chapter 1 - dynamore.de

chapter 1 - dynamore.de
eta/Post
User’s Manual
Version 1.2.10 (Build 2006-06-02)
Engineering Technology Associates, Inc.
1133 E. Maple Road, Suite 200
Troy, MI 48083-2896
Phone:
(248) 729-3010
Fax:
(248) 729-3020
Support: (800) 382-3362
E-mail:
[email protected]
Engineering Technology Associates, Inc., ETA, the ETA logo, and eta/Post are the registered
trademarks of Engineering Technology Associates, Inc. All other trademarks or names are the property
of the respective owners.
Copyright 1998 to 2006 Engineering Technology Associates, Inc. All rights reserved.
TABLE OF CONTENTS
TABLE OF CONTENTS................................................................................................................III
TABLE OF FIGURE ................................................................................................................... VII
INTRODUCTION ............................................................................................................................1
1. STRUCTURAL OVERVIEW ......................................................................................................3
1.1. GENERAL OVERVIEW..................................................................................................................... 3
1.2. MENU BAR ........................................................................................................................................ 4
1.3. ICON BAR .......................................................................................................................................... 5
1.4. DISPLAY OPTIONS......................................................................................................................... 13
1.5. PRIORITY OF FUNCTIONS............................................................................................................ 15
1.6. CONTROL WINDOW AND CONTROL OPTION ......................................................................... 15
1.7. FILE FORMAT ................................................................................................................................. 15
1.8. CONFIGURATION FILE ................................................................................................................. 16
2. GETTING STARTED ................................................................................................................19
2.1. GETTING STARTED WITH D3PLOT FILE................................................................................... 19
2.2. INDEX File........................................................................................................................................ 20
2.3. REQUIREMENTS............................................................................................................................. 21
3. FILE MENU ...............................................................................................................................23
3.1. OPEN................................................................................................................................................. 23
3.2. IMPORT ............................................................................................................................................ 24
3.3. EXPORT............................................................................................................................................ 24
3.4. COPY TO CLIPBOARD ................................................................................................................... 25
3.5. PRINT................................................................................................................................................ 25
3.6. PRINT TO FILE ................................................................................................................................ 28
3.7. QUIT (ALT+Q) ................................................................................................................................. 29
4. EDIT MENU...............................................................................................................................31
4.1. CREATE LINE.................................................................................................................................. 31
4.2. DELETE LINE .................................................................................................................................. 32
4.3. LABEL/ARROW............................................................................................................................... 32
4.4. ROTATE LIGHT............................................................................................................................... 34
4.5. LIGHT PROPERTY .......................................................................................................................... 34
4.6. COLOR MAP .................................................................................................................................... 36
4.7. PART ATTRIBUTES ........................................................................................................................ 37
4.8. USER VIEW...................................................................................................................................... 43
4.9. BACKGROUND COLOR................................................................................................................. 44
5. TOOL..........................................................................................................................................47
5.1. SECTION CUT.................................................................................................................................. 47
5.1.1. DEFINE CUT PLANE.............................................................................................................. 48
eta/Post 1.2
III
5.1.2. CLEAR SECTION CUT........................................................................................................... 50
5.1.3. NORMAL VIEW...................................................................................................................... 50
5.1.4. SECTION CUT OPTIONS ....................................................................................................... 50
5.1.5. EXPORT SECTION CUT ........................................................................................................ 52
5.1.6. SECTION VALUE CURVE..................................................................................................... 53
5.1.7. SECTION CURVATURE CURVE .......................................................................................... 54
5.1.8. MEASURE ARC LENGTH ..................................................................................................... 55
5.1.9. MOVE SECTION BY MOUSE................................................................................................ 56
5.1.10. DISPLAY OPTIONS .............................................................................................................. 56
5.1.11. SECTION LINE POSITION................................................................................................... 57
5.2. CONSTRAINT MOTION ................................................................................................................. 58
5.3. MIRROR RESULT BY XYZ ............................................................................................................ 58
5.4. FACE REFLECTION LINE CHECK ............................................................................................... 60
5.5. DEFINE ACTIVE WINDOW ........................................................................................................... 63
5.6. DEFINE NODE TRACE ................................................................................................................... 64
5.7. PART VALUE CURVE .................................................................................................................... 65
5.8. NODAL VALUE CURVE................................................................................................................. 66
5.9. ELEMENT VALUE CURVE ............................................................................................................ 67
5.10. NODAL DISPLACEMENT CURVE.............................................................................................. 68
5.11. PART DISTANCE........................................................................................................................... 69
5.12. PART INTERFERENCE CHECK .................................................................................................. 71
5.13. EXPORT BOUNDARY LINE ........................................................................................................ 73
5.14. MODEL SUMMARY...................................................................................................................... 73
6. OPTION ......................................................................................................................................75
6.1. AXIS (toggle) .................................................................................................................................... 75
6.2. TITLE (toggle)................................................................................................................................... 75
6.3. COLOR BAR(toggle) ........................................................................................................................ 75
6.4. MAX-MIN MARKER(toggle) ..................................................................................................... 76
6.5. LOGO ................................................................................................................................................ 76
6.6. NORMAL COLOR (toggle) .............................................................................................................. 76
6.7. ELEMENT ORIENTATION (toggle) ............................................................................................... 76
6.8. ACTIVE CONTOUR RANGE .......................................................................................................... 77
6.9. OVERALL CONTOUR RANGE ...................................................................................................... 77
6.10. DEFINE ROTATE CENTER .......................................................................................................... 77
6.11. APPLY VPG LAYOUT................................................................................................................... 77
6.12. APPLY SECOND SHADING ......................................................................................................... 78
6.13. APPLY FADED BACKGROUND.................................................................................................. 78
6.14. APPLY LOCAL LIGHT.................................................................................................................. 78
6.15. APPLY MOUSE TRACKING ........................................................................................................ 78
7. POSTPROCESS..........................................................................................................................79
7.1. UNDEFORM ..................................................................................................................................... 80
7.2. DEFORM........................................................................................................................................... 80
7.2.1. DEFORM OPERATION .......................................................................................................... 80
IV
eta/Post 1.2
7.2.2. FRAME OPERATION ............................................................................................................. 81
7.2.3. ANIMATION OPERATION .................................................................................................... 82
7.3. CONTOUR ...................................................................................................................................... 84
7.3.1. SELECT COMPONENT .......................................................................................................... 85
7.3.2. CURRENT LAYER................................................................................................................. 86
7.3.3. INCREMENT ........................................................................................................................... 86
7.3.4. UNDEFORM ............................................................................................................................ 87
7.3.5. ELEMENT RESULT ................................................................................................................ 88
7.3.6. CONTOUR SETTING.............................................................................................................. 88
7.3.7. EXPORT CONTOUR LINE..................................................................................................... 90
7.3.8. LIST VALUE............................................................................................................................ 91
7.4. VECTOR ........................................................................................................................................... 93
7.4.1. SELECT COMPONENT .......................................................................................................... 94
7.4.2. BY ELEMENT SIZE AND SCALE FACTOR ........................................................................ 95
7.5. FLD.................................................................................................................................................... 96
7.5.1. FLD CURVE OPTION ............................................................................................................. 97
7.5.2. EDIT FLD WINDOW............................................................................................................. 100
7.5.3. FLD REVERSED MAPPING................................................................................................. 100
7.5.4. FLD PATH.............................................................................................................................. 101
7.6. THICKNESS ................................................................................................................................... 101
7.7. MAJOR AND MINOR STRAIN..................................................................................................... 104
7.8. IN PLANE STRAINS...................................................................................................................... 104
7.9. BLANK TOOL DISTANCE ........................................................................................................... 105
7.10. CIRCULAR GRID......................................................................................................................... 108
7.11. SKID MARK ................................................................................................................................. 110
7.12. BLANK OUTLINE ....................................................................................................................... 112
7.13. EDGE MOVEMENT..................................................................................................................... 114
7.14. DEFECT DETECTION ................................................................................................................. 116
7.15. BLANK MOVEMENT.................................................................................................................. 120
8. GRAPH .....................................................................................................................................123
8.1. START UP....................................................................................................................................... 123
8.2. RESULT FILE LOAD ..................................................................................................................... 124
8.2.1. AIRBAG STATISTICS (ABSTAT) ....................................................................................... 126
8.2.2. BOUNDARY NODAL FORCES (BNDOUT) ....................................................................... 126
8.2.3. DEFORMED GEOMETRY (DEFGEO) ................................................................................ 126
8.2.4. DISCRETE ELEMENTS (DEFORC)..................................................................................... 126
8.2.5. ELEMENT DATA (ELOUT) ................................................................................................. 127
8.2.6. CONTACT ELEMENT RESULTANTS (GCEOUT) ............................................................ 127
8.2.7. GLOBAL DATA (GLSTAT).................................................................................................. 127
8.2.8. JOINT FORCE FILE (JNTFORC) ......................................................................................... 128
8.2.9. MATERIAL EERGIES (MATSUM)...................................................................................... 128
8.2.10. CONTACT INTERFACE FORCES (NCFORC).................................................................. 128
8.2.11. NODAL FORCE (NODFOR)............................................................................................... 129
8.2.12. NODAL POINT DATA (NODOUT).................................................................................... 129
eta/Post 1.2
V
8.2.13. RIGID BODY DATA (RBDOUT) ....................................................................................... 129
8.2.14. RESULT INTERFACE FORCES (RCFORC) ..................................................................... 130
8.2.15. WALL FORCES (RWFORC)............................................................................................... 130
8.2.16. SEATBELT OUTPUT (SBTOUT) ....................................................................................... 130
8.2.17. CROSS SECTION FORCE (SECFORC) ............................................................................. 130
8.2.18. SLIDING INTERFACE ENERGY (SLEOUT) .................................................................... 131
8.2.19. SPC REACTION FORCES (SPCFORC) ............................................................................. 131
8.2.20. SUBSYSTEM STATISTICS (SSSTAT) .............................................................................. 131
8.2.21. SPOTWELD RIVET FORCES (SWFORC)......................................................................... 132
8.2.22. TEMPERATURE OUTPUT (TPRINT) ............................................................................... 132
8.3. Graph Control Window.................................................................................................................... 132
8.4. Graph Operation............................................................................................................................... 135
8.4.1. PRINT..................................................................................................................................... 135
8.4.2. CLIPBOARD .......................................................................................................................... 135
8.4.3. EXPORT ................................................................................................................................. 136
8.4.4. ATTRIBUTE .......................................................................................................................... 136
8.4.5. OPERATION .......................................................................................................................... 140
8.4.6. SAVE ...................................................................................................................................... 150
INDEX FILE FORMAT ...............................................................................................................151
INTRODUCTION .................................................................................................................................. 151
HEADER ................................................................................................................................................ 151
*DATABASE_FILE............................................................................................................................... 151
*DATABASE_STATISTICS ................................................................................................................. 152
*DATABASE_UNIT.............................................................................................................................. 152
*PART_DF ............................................................................................................................................. 153
*DEFINE_FLD....................................................................................................................................... 153
*DRAWBEAD_DF ................................................................................................................................ 154
*DEFINE_POPLINE.............................................................................................................................. 155
*DEFINE_LINE3D ................................................................................................................................ 155
*END ...................................................................................................................................................... 156
HARDWARE AND SOFTWARE REQUIREMENTS................................................................157
FINAL NOTES .............................................................................................................................159
VI
eta/Post 1.2
TABLE OF FIGURE
Figure 1.1 eta/Post interface window.......................................................................................3
Figure 1.2 PART ON/OFF window..........................................................................................6
Figure 1.3 Identify Node Control Option window ................................................................. 11
Figure 1.4 Measure distance Control Option window ...........................................................12
Figure 1.5 Post process functional icons in icon bar..............................................................13
Figure 1.6 Special icons for eta/DYNAFORM result ............................................................13
Figure 2.1 eta/Post GUI..........................................................................................................19
Figure 2.2 Select File window ...............................................................................................20
Figure 2.3 Select idx File Window.......................................................................................21
Figure 3.1 The file menu ........................................................................................................23
Figure 3.2 Select File window ...............................................................................................23
Figure 3.3 Import File window ..............................................................................................24
Figure 3.4 Export file dialog box ...........................................................................................25
Figure 3.5 Print window.........................................................................................................26
Figure 3.6 Select Print Area Dialogue Box ............................................................................28
Figure 3.7 Print to File Window.............................................................................................29
Figure 4.1 Edit menu..............................................................................................................31
Figure 4.2 Create Line Control Option window ....................................................................31
Figure 4.3 Label and Arrow Control Option Window............................................................33
Figure 4.4 Light Property Control Option Window ...............................................................34
Figure 4.5 Light Adjustment Control Window.......................................................................36
Figure 4.6 Color Map Control window..................................................................................37
Figure 4.7 Part Color Control window...................................................................................37
Figure 4.8 Part Attributes control window (Part Colour) .......................................................38
Figure 4.9 Part Attributes control window (Part Material) ....................................................39
Figure 4.10 Part Attributes control window (Transparency)..................................................40
Figure 4.11 Part Attributes control window (Wire Frame).....................................................41
Figure 4.12 Part Attributes control window (No Contour) ....................................................42
Figure 4.13 User View control window .................................................................................43
Figure 4.14 View Name control window ...............................................................................44
Figure 4.15 Background Color Palette...................................................................................45
Figure 5.1 Tool Menu............................................................................................................47
Figure 5.2 Section Cut Operation...........................................................................................48
Figure 5.3 Define Cut Plane...................................................................................................49
Figure 5.4 Section Cut Operation...........................................................................................50
Figure 5.5 Section Cut Option ...............................................................................................51
Figure 5.6 The result of ARC FIT ..........................................................................................52
Figure 5.7 Export Nastran File...............................................................................................53
Figure 5.8 A Section plus curve window................................................................................54
Figure 5.9 Section Curvature Curve.......................................................................................55
Figure 5.10 Measure Arc Length ...........................................................................................55
Figure 5.11 An Example for PARTIAL MODEL display ......................................................57
Figure 5.12 Constraint Motion Dialog Window.....................................................................58
Figure 5.13 Constraint Motion Dialog Window.....................................................................58
Figure 5.14 Mirror Result Control Option Window...............................................................59
Figure 5.15 Example of a quarter model and result ...............................................................59
Figure 5.16 Mirrored model and result by YZ Plane .............................................................60
Figure 5.17 Face Reflection Control Window .......................................................................61
Figure 5.18 Face Reflect Examination Result........................................................................62
eta/Post 1.2
VII
Figure 5.19 Define Active Window Control Window............................................................63
Figure 5.20 Select Node Control Window .............................................................................64
Figure 5.21 The Node Trace...................................................................................................64
Figure 5.22 Select Part Control Option..................................................................................65
Figure 5.23 A typical Part value curve ...................................................................................66
Figure 5.24 Select Node Control Window .............................................................................66
Figure 5.25 Node Curve Result..............................................................................................67
Figure 5.26 A sample of ELEMENT VALUE CURVE..........................................................68
Figure 5.27 User Select Control Window ..............................................................................68
Figure 5.28 Nodal Displacement Curve Example..................................................................69
Figure 5.29 User Control Window .........................................................................................69
Figure 5.30 Calculation Result When the Option is off .........................................................71
Figure 5.31 Calculation Result when the Option is on...........................................................71
Figure 5.32 User Control Window .........................................................................................72
Figure 5.33 Export Boundary Line dialog window................................................................73
Figure 5.34 Model Summary .................................................................................................74
Figure 6.1 Tool Menu.............................................................................................................75
Figure 6.2 Typical display with Normal Color and Plate Normal option...............................76
Figure 6.3 Typical display with Element Orientation option .................................................77
Figure 7.1 Post-process functional icons................................................................................79
Figure 7.2 Deform control window........................................................................................80
Figure 7.3 Frames Operations ................................................................................................81
Figure 7.4 Animate.................................................................................................................82
Figure 7.5 Play Status ............................................................................................................83
Figure 7.6 Pause Status ..........................................................................................................83
Figure 7.7 Animate Contour control window.........................................................................85
Figure 7.8 Contour display on un-deformed mesh.................................................................87
Figure 7.9 Contour display on deformed mesh ......................................................................87
Figure 7.10 Contour Setting box ............................................................................................88
Figure 7.11 The Reverse contour Bar result...........................................................................88
Figure 7.12 A typical contour plot with Contour Range ........................................................89
Figure 7.13 An Example for Contour plot of 12 colors..........................................................90
Figure 7.14 Select Node Control Option................................................................................91
Figure 7.15 List Node Value ..................................................................................................92
Figure 7.16 List Value Control Option...................................................................................92
Figure 7.17 Vector Operation control window.......................................................................94
Figure 7.18 FLD control window...........................................................................................96
Figure 7.19 FLD Curve and Option .......................................................................................97
Figure 7.20 FLD file format...................................................................................................98
Figure 7.21 An Example of FLD evulation..........................................................................100
Figure 7.22 FLD Strain Path ................................................................................................101
Figure 7.23 Thickness Control Window...............................................................................102
Figure 7.24 Thickness Contour ............................................................................................103
Figure 7.25 Thinning Contour..............................................................................................103
Figure 7.26 Major Strain and Minor Strain ..........................................................................104
Figure 7.27 Strain In-Plane Control Window.......................................................................105
Figure 7.28 Blank Tool Distance..........................................................................................106
Figure 7.29 Select Part Control Option................................................................................107
Figure 7.30 Blank and Tool Distance...................................................................................108
Figure 7.31 Circular Grid.....................................................................................................109
Figure 7.32 A sample plot of Circular Grid.......................................................................... 110
Figure 7.33 Skid Mark Operation ........................................................................................ 111
Figure 7.34 A sample plot of Skid Mark .............................................................................. 112
Figure 7.35 Select Line Control Option Window................................................................. 113
VIII
eta/Post 1.2
Figure 7.36 Trim Line on Final Step of the Deformed Blank .............................................. 113
Figure 7.37 Outline on the Undeformed blank .................................................................... 113
Figure 7.38 Edge movement control window ...................................................................... 114
Figure 7.39 Material Float Define........................................................................................ 115
Figure 7.40 X Displacement is 20, the material movement ................................................. 115
Figure 7.41 Defect Detection ............................................................................................... 117
Figure 7.42 Select Elements Option..................................................................................... 118
Figure 7.43 Defect Detection ............................................................................................... 119
Figure 7.44 An Example of Detect Defection ......................................................................120
Figure 7.45 Blank Distance..................................................................................................121
Figure 7.46 Blank Movement Nephogram...........................................................................122
Figure 8.1 Graph start up window........................................................................................124
Figure 8.2 Select File dialog box. ........................................................................................125
Figure 8.3 Graph control window ........................................................................................133
Figure 8.4 Graph window in eta-Post window. ....................................................................134
Figure 8.5 Curve operation toolbar. .....................................................................................135
Figure 8.6 An inserted image form clipboard to MS-Word..................................................136
Figure 8.7 Attribute control window ....................................................................................137
Figure 8.8 Properties window ..............................................................................................138
Figure 8.9 Colour panel........................................................................................................139
Figure 8.10 Curve Operation window..................................................................................141
Figure 8.11 DATA CONTROL window of AVERAGE filter...............................................144
Figure 8.12 DATA CONTROL of FIR filter ........................................................................145
Figure 8.13 DATA CONTROL window of SAE filter .........................................................146
Figure 8.14 DATA CONTROL window of Butterworth filter .............................................147
eta/Post 1.2
IX
INTRODUCTION
0
INTRODUCTION
The POST function in DYNAFORM is a general post-processor for all ETA software, including
DYNAFORM, VPG, and FEMB. POST is an independent application module that is started when the
user selects POST from the top menu.
The POST module quickly post-processes result data of finite element analyses, including the real-time
animation of stresses, strain, energy, displacements, and time history curves. Its fully dynamic
allocation of memory optimizes system resources, allowing for unlimited model sizes.
eta/Post 1.2
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CHAPTER 1
STRUCTURAL OVERVIEW
1
1. STRUCTURAL OVERVIEW
1.1. GENERAL OVERVIEW
The POST application interface varies slightly from the preprocessing user interface. It allows the user
to quickly access most functions at any time during the session. The icon bar and menu bar functions
behave in the same manner as the preprocessing functions.
eta/Post breaks the screen into six distinct regions. The regions are used to provide input or display
messages to the user. The six regions are illustrated and described in Figure 1.1.
Figure 1.1 eta/Post interface window
1.
GRAPHIC DISPLAY WINDOW
Model and graphs are displayed in this window.
eta/Post 1.2
3
STRUCTURAL OVERVIEW
2.
CHAPTER 1
MENU BAR
Commands and options are displayed in this area.
3.
ICON BAR
Gives the user easy access to the commonly used functions of the program.
4.
CONTROL WINDOW AREA
Once the user selects a command from the MENU BAR or ICON BAR, a corresponding dialog
window with the appropriate functions is displayed in this area.
5.
DISPLAY OPTIONS
The options in this group are used to control the model displayed in the graphic display window.
These options are always displayed and can be used at any time during an eta/Post session.
6.
PROMPT AREA
eta/Post displays comments and messages to the user.
The Graphic User Interface (GUI) is designed for easy access to all the functions for postprocessing DYNA and Nastran results. This GUI is unified for both Windows and UNIX/LINUX
platforms. The user activates the functions via mouse click.
1.2. MENU BAR
The menu bar contains the FILE, EDIT, TOOL and OPTION menus. All the menus are designed in a
logical and efficient way to minimize number of mouse clicks and operations. The FILE menu contains
functions that control the input and output of data files, the EDIT menu contains functions that allow
the user to alter the model/graph and the VIEW menu contains functions that alter the display. Each of
these menus branches into various submenus and functions.
FILE MANAGER
Imports and exports data from eta/Post
EDIT
Organizes the functions for model operation
TOOLS
eta/Post's "tool kit."
OPTION
Provide options in the graphics display window.
HELP
Displays the information to contact eta/Post Technical Support.
The menus and functions will be described in the related sections.
4
eta/Post 1.2
CHAPTER 1
STRUCTURAL OVERVIEW
1.3. ICON BAR
The icon bar is designed to give the user easy access to the most commonly used functions in eta/Post.
Some of the functions represented in the icon bar are also located in the different menus. The user may
simply click these icons to activate the functions instead of navigating through the menus.
7.
OPEN
Opens a result or model file.
8.
PRINT
Creates a postscript file of the display area and sends it to the printer (default) or writes the image
to a file. Prior to printing, the printer must be initialized to accommodate the print out from
eta/Post software.
PART ON/OFF
9.
This function enables the user to turn the selected part(s) on/off. Once the function is selected, the
PART ON/OFF dialog window is displayed shown as Figure 1.2.
eta/Post 1.2
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STRUCTURAL OVERVIEW
CHAPTER 1
Figure 1.2 PART ON/OFF window
Note: When PART ON/OFF dialog window is displayed, only VIEW OPREATION functions are
enabled to use, other functions are disabled.
z
Part and part set option
Default setting closes and opens parts. If post process result includes part set define, the
option can be activated. At this time, the opening and closing object is part set.
z
Sort By
Includes ID and NAME options. Parts can be arranged by selected method in part list.
z
Enter ID
User may enter part ID in the input box and then click ENTER to change current real status.
If it was open before, it is closed after clicking ENTER, and vice versa.
User can select part to turn on or off by picking the part name in the part list. There are
several other methods to turn part on or off as described below.
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eta/Post 1.2
CHAPTER 1
z
STRUCTURAL OVERVIEW
SELECT BY
y
PICK ELEMENT
The part including the selected element is selected. The element will be highlighted as
the cursor moves over the part.
y
SELECT BY DRAG WINDOW
This function allows the user to drag a window around the desired parts, All parts
including the selected elements are selected.
y
SELECT BY MULTI-REGION
This function allows the user to select a multi-point region, all parts including the
selected elements are selected. Points are selected by clicking the mouse in the Graphic
Display area.
y
SELECT BY FREE HAND
This function allows the user to select a region by a free hand, all parts including the
selected elements are selected. The user depresses the left mouse button and moves the
mouse to select the desired region.
z
SHOW ELEMENT TYPE
This function allows the user to turn selected element types on/off so that they are shown or
no longer shown in the window list and in the GRAPHIC DISPLAY window.
y
BEAM
All parts with the beam element are removed from the part list if the BEAM is toggled
off. And all parts with the beam element appear in the part list if the BEAM is toggled
on.
y
SHELL
All parts with the shell element are removed from the part list if the SHELL is toggled
off. And all parts with the shell element appear in the part list if the SHELL is toggled
on.
y
eta/Post 1.2
SOLID
7
STRUCTURAL OVERVIEW
CHAPTER 1
All parts with the solid element are removed from the part list if the SOLID is toggled off.
And all parts with the solid element appear in the part list if the SOLID is toggled on.
z
OTHER
All parts with the line are removed from the part list if the OTHER is toggled off. And all
parts with the line appear in the part list if the OTHER is toggled on.
z
KEEP
If KEEP is selected, the selected parts are highlighted and are labeled with asterisk on the
Part List. When the user exits the function, only the selected parts remain displayed.
z
ALL ON
Turns all parts on and displays them on the screen.
z
ALL OFF
Turns all parts off from the GRAPHICS DISPLAY.
z
REVERSE
This function reverses the current on and off status of the parts in the model. The program
updates the model display accordingly.
z
UNDO
Undo the last operation in Part ON/OFF function.
z
REDO
Redo the last operation in the part ON/OFF function.
z
EXIT
Closes the PART ON/OFF dialog window and exits the function.
10.
VIRTUAL X ROTATION
The displayed model will dynamically rotate about the global X-axis when the cursor is moved up
or down. Default rotate center is the model center. If Define Rotate Center is open, user may
define rotate center. After clicking the VX icon, user may click left button of mouse to specify a
suitable position as the rotate center, and move the cursor up and down to rotate the model.
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eta/Post 1.2
CHAPTER 1
11.
STRUCTURAL OVERVIEW
VIRTUAL Y ROTATION
The displayed model will dynamically rotate about the global Y-axis when the cursor is moved up
or down. Default rotate center is the model center. If Define Rotate Center is open, user may
define rotate center. After clicking the VY icon, user may click left button of mouse to specify a
suitable position as the rotate center, and move the cursor up and down to rotate the model.
12.
VIRTUAL Z ROTATION
The displayed model will dynamically rotate about the global Z-axis when the cursor is moved up
or down. Default rotate center is the model center. If Define Rotate Center is open, user may
define rotate center. After clicking the VZ icon, user may click left button of mouse to specify a
suitable position as the rotate center, and move the cursor up and down to rotate the model.
13.
SCREEN X ROTATION
The displayed model will dynamically rotate about the screen X-axis when the cursor is moved up
or down. Default rotate center is the model center. If Define Rotate Center is open, user may
define rotate center. After clicking the SX icon, user may click left button of mouse to specify a
suitable position as the rotate center, and move the cursor up and down to rotate the model.
14.
SCREEN Y ROTATION
The displayed model will dynamically rotate about the screen Y-axis when the cursor is moved up
or down. Default rotate center is the model center. If Define Rotate Center is open, user may
define rotate center. After clicking the SY icon, user may click left button of mouse to specify a
suitable position as the rotate center, and move the cursor up and down to rotate the model.
15.
SCREEN Z ROTATION
The displayed model will dynamically rotate about the screen Z-axis when the cursor is moved up
or down. Default rotate center is the model center. If Define Rotate Center is open, user may
define rotate center. After clicking the SZ icon, user may click left button of mouse to specify a
suitable position as the rotate center, and move the cursor up and down to rotate the model.
16.
FREE ROTATION
This function is a combined rotation of Screen X Rotation and Screen Y Rotation. Moving the
mouse up/down manipulates Screen X rotation. Moving the mouse left/right manipulates Screen Y
rotation. Moving the mouse diagonally combines the rotations of both directions. Click the left
eta/Post 1.2
9
STRUCTURAL OVERVIEW
CHAPTER 1
mouse button to stop the rotation. The user may activate this function by pressing Control and left
mouse button while moving the mouse. Release the mouse button to stop the rotation.
Default rotation center is the model center. If Define Rotate Center is open, user may define rotate
center. After clicking the icon, user may click left button of mouse to specify a suitable position as
the rotate center, and move the cursor up and down to rotate the model.
17.
PAN
This command enables the user to translate the model on the screen by following the movement of
the cursor. If the cursor is moved off the graphics display window, the cursor reappears at the
opposite edge of the window to continue the operation. Click the left mouse button to stop the pan
operation. The user may activate this function by pressing Control and Middle mouse button while
moving the mouse. Release the mouse button to exit the function.
18.
CURSOR ZOOM
The user picks a point about which to zoom. The model is centered about this point and the user
may move the cursor up to zoom in or down to zoom out. The user may activate this function by
pressing Control and right mouse button while moving the mouse. Release the mouse button to
exit the function.
Note: If the cursor is moved off the graphics display window in functions ROTATE, PAN or
CURSOR ROOM, the cursor re-appears at the opposite of the window automatically to
continue the operation.
19.
WINDOW ZOOM
The user defines the corners of the zoom window by positioning the cursor on the display screen.
The user presses and holds the left mouse button and drags the cursor diagonally until the desired
window size is reached. Releases the left button, the area included in the window will be displayed
in full screen.
20.
FREE HAND ZOOM
The user defines a free region by pressing the left mouse button and dragging the cursor on the
display screen to define the region. Releases the left button, the area included the region will be
displayed in full screen.
21.
10
FILL
eta/Post 1.2
CHAPTER 1
STRUCTURAL OVERVIEW
Rescale the model to include all entities that are currently displayed. FILL automatically zooms in
or out until the model fits the viewing area of the screen.
TOP VIEW
22.
Automatically displays the model from the TOP or in the XY-plane.
23.
Y-Z VIEW
Automatically displays the model from the RIGHT or in the YZ-plane.
24.
X-Z VIEW
Automatically displays the model from the LEFT or in the XZ-plane.
25.
ISOMETRIC VIEW
Automatically displays the model from the isometric plane (60-degree isometric).
CLEAR
26.
Remove the highlighted entities from the screen.
27.
IDENTIFY NODE
This function enables the user to identify any node by cursor selection (default) or key in node
number. The program labels the node number of the selected node is highlighted on the screen and
the outputs the coordinates in the message window. Figure 1.3 shows the CONTROL OPTION
window when the function starts.
Figure 1.3 Identify Node Control Option window
z
Node ID
Select by cursor is the Default fashion.The program highlights the node that is nearest the
cursor. Click the left mouse button when the desired node is traced. The selected node will be
eta/Post 1.2
11
STRUCTURAL OVERVIEW
CHAPTER 1
labeled with the node number. User also can key node ID in the input box. This option
allows user to identify the node by entering a node number.
28.
IDENDTIY ELEMENT
This function enables the user to identify any element, its part and its nodes by cursor selection
(default) or key in element ID number. The program will highlight the selected element with the
element number on the screen and also display the element connectivity in the message window.
The operation of this function is same as the IDENTIFY NODE function.
29.
DISTANCE BETWEEN TWO NODES/POINTS
This function calculates the distance between two nodes/points selected by cursor pick or key in
node number/point number. The program displays a CONTROL OPTION window as shown as
Figure 1.4.
Figure 1.4 Measure distance Control Option window
Operation of SEELECT BY CURSOR and KEY IN ID are the same with IDENTIFY NODE
function. REJECT LAST allows user to reject the last selected node. Once two nodes are selected,
the program labels the distance and X, Y, Z components between the selected nodes on the screen
and also outputs the information in the message window.
30.
ANGLE BETWEEN THREE NODES
This function measures the angle between two vectors formed by three nodes. The first selected
node defines the vertex of the angle. The program displays a CONTROL OPTION window that
is common with the one in DISTANCE BETWEEN TWO NODES function. Once three nodes
are selected, the program labels the angle at the vertex node and outputs the information in the
message window.
31.
ANGLE BETWEEN TWO LINES
This function is used to measure the angle between two lines that are composed by selected four
nodes. Default setting is to select by mouse click or inputting node numbers. After selecting four
nodes, program displays the angle at the two lines by selected four nodes and at the same time
12
eta/Post 1.2
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STRUCTURAL OVERVIEW
output information in the information window.
RADIUS BETWEEN THREE NODES
32.
This function enables the user to measure the radius of an arc that is passing through three selected
nodes by cursor selection (default) or key in node number. After selecting three nodes the program
will display the radius on screen and output the coordinates of the center of the arc in message
window.
33. POSTPROCESS ICON
The functions in the POSTPROCESS icon bar allow the user to access the functions to process the
result files. There are two kinds of icon on the eta/Post, one is global icons, which control part
on/off, views, and dynamic rotation. The seond group of icons controls the type of post processing
to be performed; deformed shape, stress, vector plots, and graphing. There are icons specializing
for eta/DYNAFORM result, located in the control window. As shown in Figure 1.5 and Figure
1.6, each of these cons is described in Chapter 7.
Figure 1.5 Post process functional icons in icon bar
Figure 1.6 Special icons for eta/DYNAFORM result
1.4. DISPLAY OPTIONS
The DISPLAY OPTIONS window displays the current part and contains the following commonly used
functions.
1.
SHADE (toggle)
This command displays the elements as if they were illuminated by a light source. Elements that
are not directly exposed to the light source are appropriately “shaded” to simulate the actual
shading effect.
Eta/Post uses two methods for object shading: flat and smooth. Flat shading shades each polygon
upon the intensity of the light over a series of polygons making the elements appear flat and
angled.
eta/Post 1.2
13
STRUCTURAL OVERVIEW
2.
CHAPTER 1
SMOOTH SHADE (toggle)
This function uses the Gourand shading method to make the model appears more smoothly. It
interpolates shade across edges, reduces effect of intensity change. The feature angles between
adjacent elements are smoothed by this shading method.
Note: The SMOOTH SHADE option is only available when the SHADE option is on.
3.
MATERIAL COLOR (toggle)
This function can only be used in SHADE mode. If the function is toggled on, the model will be
plotted in gray color during deformed plot or animation deformation and the parts without
stress/strain during contour plot or animation. If the parts are defined with material color in Part
Attribute function, they will be shaded in the material color.
Note: The GRAY COLOR option is only available when the SHADE option is on.
4.
FILL COLOR (toggle)
This function toggles on/off the model in FILL COLOR mode. FILL COLOR fills the displayed
elements with their designated part color.
5.
ELEMENT EDGE (toggle)
This function can only be used in FILL COLOR mode. The outline of the elements is plotted in
white when the option is toggled on. The model can be displayed without the outline by toggling
off the option.
Note: The ELEMENT EDGE is only available when the FILL COLOR or SHADE option is on.
6.
SHRINK (toggle)
SHRINK creates a plot with elements reduced in size by 20 percent. This option allows the user to
toggle the function on/off.
7.
HIDDEN SURFACE
This function toggles on/off the model in HIDDEN SURFACE mode. HIDDEN SURFACE hides
the elements behind the elements viewed from the user’s point of view.
8.
PLATE NORMAL (toggle)
This function toggles plate normal on and off. The plate normal is shown with a vector drawn at
the center of element and along the element’s normal direction.
14
eta/Post 1.2
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9.
STRUCTURAL OVERVIEW
BACKGRAOUND (toggle)
If this function is toggled on, the background color is set to white. Otherwise, default background
color is black. User may open EDIT menu in Background color menu adjust background color.
1.5. PRIORITY OF FUNCTIONS
The functions in eta/Post are prioritized. Functions in Display Options can be accessed to at any time.
The functions in Edit and Tool menu have the highest priority. If any of these functions is started, all
other functions in eta/POST are disabled.
Control Window has the lowest priority. The user is enabled to access other functions when Control
window is opened. Only functions in Edit menu, Tool menu and Display Option are allowed to be used
during animation.
1.6. CONTROL WINDOW AND CONTROL OPTION
eta/Post incorporates two types of window, FUNCTION DIALOG WINDOW and CONTROL
WINDOW. At the bottom of the FUNCTION DIALOG WINDOW there are buttons to execute, reject,
reset the data or close the window. The functions of these buttons are listed below.
APPLY
Executes the current function
CANCEL
Rejects the current operation
EXIT
Exits the current window
OK
Accepts the data in the dialog box and forwards the user to the next step.
UNDO
Rejects the last step of the operation.
REDO
Allows user to restore to the operation before UNDO
RESET
Restores the original set
REJECT
Rejects the previous selection
1.7. FILE FORMAT
The protocol for naming files during an eta/Post session includes attaching suffixes to the file names
that specify the file types. The appropriate file names are listed in the option area of the display screen.
DYNA result file (d3plot, d3drif, dynain)
DYNA model file (*.dyn)
DYNA result file of eigenvalue analysis (d3eigv)
NASTRAN results file (*.pch, *.op2)
NASTRAN model file (*.nas, *.dat)
eta/Post 1.2
15
STRUCTURAL OVERVIEW
CHAPTER 1
DYNAFORM/VPG/FEMB LINE DATA file (*.lin)
eta3DPlayer 3D display file format (*.e3d)
eta/Post can open DYNA result file to process the results directly. After the NASTRAN result file is
loaded, the program will require loading the corresponding NASTRAN model file. The user may
import LINE DATA, DYNA or NASTRAN model file.
1.8. CONFIGURATION FILE
The etapost.config file or initialization file controls the default setting of eta/Post. This file is located in
the installation directory and can be edited via the text editor. The normal content of the etapost.config
file is:
#ETA/Post User Configure File
Extended GUI = ON
[GRAPHIC ENGINE]
Language Type = ENGLISH
Renderer Volume Factor = 2
Z Buffer Bit = 16
[COLORMAP SETTING]
Color Buffer Bit = 16
Color Id 1 = 0 0 0
Edge Color = 255 255 255
Color Id 2 = 255 0 0
Background Color = 0 0 0
Color Id 3 = 255 100 50
Faded Background Type = 1
Color Id 4 = 255 255 0
Xor Plotter Styler = GDI
Color Id 5 = 146 138 50
Light Source Type = LOCAL
Color Id 6 = 160 255 27
Second Render = OFF
Color Id 7 = 50 250 0
Mouse Trace = OFF
Color Id 8 = 0 140 0
Debug = OFF
Color Id 9 = 100 243 243
Define Rotate Center = ON
Color Id 10 = 77 174 255
Polygon Offset = ENABLE
Color Id 11 = 0 0 200
Frame Rate = 10
Color Id 12 = 150 50 255
Default
Material(ALUMINIUM,COPPER,SILVER,S
TEEL) = STEEL
Color Id 13 = 255 90 148
Color Id 14 = 220 0 210
Color Id 15 = 150 147 143
[WINDOW PARAMETER]
Color Id 16 = 255 255 255
Layout Type = RIGHT
[DRAW SETTING]
[PRODUCT PARAMETER]
Line Element Width = 3
Product Name = DYNAFORM
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eta/Post 1.2
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STRUCTURAL OVERVIEW
[STONING SETTING]
<Wrinkle tendency > = 0 200 255
Defect A = 0.01
<Wrinkle
Defect B = 0.1
<Serere wrinkle
Defect C = 0.2
<Inadquate stretch > = 200 200 200
> = 255 181 255
> = 220 0 210
Defect D = 0.5
Stone Length = 10
[PRINTER SETTING]
Unit Type(MM,INCH) = MM
File Type = JPEG
[CONTOUR SETTING]
[LICENSE SETTING]
Lower Limit Color = 14 122 14
Check Type (CHECK_ALL,
Upper Limit Color = 9 37 122
LSTC_ONLY,ETA_ONLY)=CHECK_ALL
[FLD DEFAULT SETTING]
[FILE MANAGER]
Curve Type (ENGINEERING
File Type = 0
OR TRUE) = TRUE
Macro Index = ON
<Crack
> = 255 0 0
<Crack risk tendency> = 255 255 0
[DIRECTORY]
<Severe thinning > = 255 165 79
Home = D:\Software_test\op10
<Safe
eta/Post 1.2
> = 100 255 0
17
CHAPTER 2
GETTING STARTED
2
2. GETTING STARTED
The user begins a session by entering the program name "eta-POST" at the Linux/UNIX prompt, or
double clicking the eta/Post icon at the Windows. Once the program is activated, it displays the
program window and is ready for operation.Figure 2.1shows the main GUI.
Figure 2.1 eta/Post GUI
2.1. GETTING STARTED WITH D3PLOT FILE
Start eta/Post and open the desired file via the OPEN command in the FILE MENU. This function
displays the Open File dialog and allows the user to read result file or model file into eta/Post. Figure
2.2 shows the SELECT FILE window.
eta/Post 1.2
19
GETTING STARTED
CHAPTER 2
Figure 2.2 Select File window
1.
LOOK IN
Allow the user to navigate directories when opening/saving files.
2.
FILE NAME
Allow the user to specify the name of the file to open/save.
3.
FILES OF TYPE
Allow the user to specify the type of file to open/save. The available file types are displayed in the
drop down list. The SELECT FILE window only displays the files that match the current FILES
OF TYPE extension.
2.2. INDEX File
Index file (.idx) is written by pre-processor together with dyn, mod file under the same directory. It is
mainly used to transfer process parameter to post processor. If there are more than one idx file under
the same directory, when post processor opens another result , it prompts user to select a matching idx
file with the result. Figure 2.3 shows the dialog to select idx file. Detailed information of index file
refers to reference APPENDIX A.
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eta/Post 1.2
CHAPTER 2
GETTING STARTED
Figure 2.3 Select idx File Window
2.3. REQUIREMENTS
eta/Post is compatible with LS-DYNA/PC 940, 950,960 and 970 It will run in a Windows 98 or NT
4.X(or later) or LINUX?UNIX operating system. It is not recommended for use with earlier versions of
Windows. The following are minimum requirements for proper operation of eta/Post in a Windows
environment:
1.
Minimum Graphics Requirement:
800 x 600 (requires small fonts)
NOTE: The monitor resolution is determined by the Windows display settings. The settings can be
accessed by clicking the right mouse button on the Windows desktop and selecting
PROPERTIES from the pull down menu and SETTINGS from the displayed pop-up window.
These
settings
can
also
be
accessed
through
the
WINDOWS
START
MENU/SETTINGS/CONTROL PANEL/ DISPLAY.
2.
Minimum Memory Requirement:
Small model (10,000-20,000 elements)
256 megabytes RAM
Medium model (20,000-100,000 elements)
512 megabytes RAM
Large model (100,000-300,000 elements)
768 megabytes RAM
Huge model (300,000-1,000,000 elements)
1GB+RAM
eta/Post 1.2
21
GETTING STARTED
3.
CHAPTER 2
Graphics Card:
OpenGL (recommended) or DIRECT 3D (sufficient) with 8 megabytes video RAM
22
eta/Post 1.2
CHAPTER 3
FILE MENU
3
3. FILE MENU
The options in this pull-down menu are used to open, save, import, export, and print related files,. It
copies model in graphic area to clipboard and printing related files. See Figure 3.1.
Figure 3.1 The file menu
A detailed description of each function is given in the following sections.
3.1. OPEN
This function displays the Open File dialog and allows the user to read result file or model file into
eta/Post. The open file dialog is shown in Figure 3.2.
Figure 3.2 Select File window
eta/Post 1.2
23
FILE MENU
CHAPTER 3
To open result file or model data, select File Type that will be read in. Locate the desired file using the
browser and click OPEN. The model win be displayed in the Graphic Display Window and will be
ready for post processing.
Eta/Post 1.0 supports LS-DYNA d3plot, d3eigv and d3drif, NASTRAN punch and output2 result files
for post processing. The program will display the Select File window again for the user to select a
Nastran model file after the Nastran result file is loaded. It is necessary to select a matching Nastran
model in order to post-processing the result correctly.
3.2. IMPORT
This function allows the user to import DYNAFORM/VPG/FEMB Line Data file for SKID MARK and
BLANK OUTLINE functions. The Import File dialog is shown in Figure 3.3.
Figure 3.3 Import File window
User can select a DYNAFORM/VPG/FEMB Line Data file, then click OPEN button, or double click
the desired file icon from the file name list to import it.
Note: IMPORT function is disabled until a d3plot file or NASTRAN punch/output2 file is read in.
3.3. EXPORT
This function allows user to export the current model as NASTRAN file or DYNAFORM/VPG/FEMB
line data file. The Export File dialog is shown in Figure 3.4.
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eta/Post 1.2
CHAPTER 3
FILE MENU
Figure 3.4 Export file dialog box
User can export the model turned on in the current database as the NASTRAN FILE. Give a file name,
then click SAVE button to export the model in the selected file format.
Note: EXPORT function is disabled until a d3plot file or NASTRAN punch/output2 file is read in.
3.4. COPY TO CLIPBOARD
This function allows the user to save the model displayed in the GRAPHICS DISPLAY window to the
clipboard in the Windows environment. The image in the clipboard can be pasted to the document files.
3.5. PRINT
The PRINT function prints the contents of the graphics display window to a printer or saves it to a
image file.
This function allows the user to define the default settings for printing or saving image files. The
options are shown in Figure 3.5.
eta/Post 1.2
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FILE MENU
CHAPTER 3
Figure 3.5 Print window
1.
PRINTER
The user can select a printer or select a format to print to a file.
Enter the printer name in the field or select from the drop down list and click PRINT to print the
image.
If PRINT TO FILE option is selected, the user can choose a format by selecting the options in the
drop down list in FORMAT window. DYNAFORM supports Postscript (PS), Encapsulated
Postscript (EPS), GIF and JPEG file formats.
Note: When PRINT TO FILE is selected, the program will prompt the user to enter a filename to
save the current display to a file of the specified format.
2.
PAPER
The user can specify the paper size and/or margin for the image print out.
Select the button at the top left to choose a paper size.
Note: The supported sizes are: LETTER - 8.5x11 inches; A4 - 8.26x11.69; and B5 - 7.17x10.13.
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eta/Post 1.2
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FILE MENU
Users can also specify a paper size for a specific paper by entering size in the width and
height field.
Enter a number in the field next to MARGIN to define the margin of the shorter edge of the paper.
The program automatically determines the margin of the other edge in order to maintain the
original aspect ratio of the picture. This feature can also be used to scale the picture.
Select the drop down option next to UNIT to choose the unit (inch or mm) used for paper size and
margin.
3.
ORIENTATION
This function defines the image orientation as landscape or portrait on the printed copy.
4.
OPTION
These options are for defining printer output and layout on the paper.
z
PRINT BACKGROUND
If this function is toggled on, the background color of the screen will be included in the print
out. If this function is toggled off, there will be no background color on the print out.
z
BOUNDING BOX
This function draws a line frame around the picture’s border.
z
PRINT STAMP TIME
This function prints the current time at the lower right corner of the picture.
z
PRINT FILE NAME
This function prints the file name at the lower left corner of the picture.
z
PRINT ETA LOGO
This function prints eta/DYNAFORM at the lower right corner of the picture.
z
PRINT GRAPHIC DESCRIPTION
If the function is toggled on, the filed below the switch is enabled to use. User can enter a
string of characters to describe the current image to be printed on the print out.
z
KEEP BACKGROUND WHITE
eta/Post 1.2
27
FILE MENU
CHAPTER 3
When this option is toggled on, set the graphic background with white color before print to
file or print to printer.
z
PRINT AREA
When opening this option, the Define Area button beside is activated. Click Define Area
button to open following dialogue box, and left click in graphic area and drag out an area as
defined graphic output area.
Figure 3.6 Select Print Area Dialogue Box
z
NUMBER OF COPIES
This function allows the user to print multiple copies to the printer. It has no effect on the
PRINT TO FILE option.
5.
PRINT
This function will send the model to a selected printer or prompt the user to enter a file name to
save the file.
6.
CANCEL
This function allows user to exit the function, and reject any selections made.
3.6. PRINT TO FILE
This function is used to save the content in display area as graphic file. Its interface is asFigure 3.7:
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eta/Post 1.2
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FILE MENU
Figure 3.7 Print to File Window
3.7. QUIT (ALT+Q)
Selection of this option ends the current eta/Post session and returns back to eta/DYNAFORM pre
processing environment. If the user is executing eta/Post from a stand-alone mode, this option
terminates the eta/Post software.
eta/Post 1.2
29
CHAPTER 4
EDIT MENU
4
4. EDIT MENU
The functions in the Edit menu allow the user to modify the setting of the model display. Figure 4.1
shows the drop down list of the Edit functions.
Figure 4.1 Edit menu
A detailed description of each function is given in the following sections.
4.1. CREATE LINE
This function enables the user to create a line by selecting a set of nodes. In eta/Post a line is formed by
a sequence of points. The program displays the line by a set of straight-line segments between adjacent
points in sequence.
The generated lines are included in a new part.
The program displays a
CONTROL OPTION window as shown as Figure 4.2.
Figure 4.2 Create Line Control Option window
eta/Post 1.2
31
EDIT MENU
1.
CHAPTER 4
SELECT BY CURSOR
Select the location of the node, a point will be created.
2.
END PICK
Click this button to create a line by a set of straight-line segments between adjacent points in
sequence.
3.
ENCLOSE LINE
The created line is closed by a straight-line segment between the first selected and the last selected
point.
4.
REJECT LAST
The last selected node is rejected.
5.
REJECT ALL
All selected nodes are rejected.
6.
EXIT
Exit the function.
4.2. DELETE LINE
This function enables the user to delete the selected line(s).
4.3. LABEL/ARROW
LABEL allows the user to enter a title or text label at any location in the graphic display window.
ARROW allows the user to draw arrows at any location in the display window. The program displays a
control window as shown in Figure 4.3
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eta/Post 1.2
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EDIT MENU
Figure 4.3 Label and Arrow Control Option Window
1.
DISPLAY LABEL/ARROW
Controls the Label/Arrow display in the graphic display window. Default is toggled on.
2.
FONT SIZE
This function is used to control font size of the text. Mouse click the pulling-down menu beside to
select font size. Default value is Pt12.
3.
ARROW
This function enables the user to select two points by cursor to draw an arrow in the graphic
display window. The name of the arrow will be listed in the Label/Arrow control window. The
first location is the tail of the arrow and the second location is the arrow head.
4.
TEXT
This function allows the user to add a text label in the graphic display area. Enter a string of
characters in the field above the TEXT button. Press the TEXT button then click a location on the
screen. The program will add the text label at the clicked location.
5.
DELETE
Delete an arrow or a text label. The program will highlight the arrow or text label on the screen as
the user selects an arrow or text label in the list. Click DELETE button to delete the highlighted
arrow or text label. The user may combine the Shift or Cntrl key and mouse click for multiple
selections.
eta/Post 1.2
33
EDIT MENU
6.
CHAPTER 4
EXIT
Exit the function.
4.4. ROTATE LIGHT
eta/Post uses two light sources directed from the specific locations from the model. This function
allows the user to rotate the light sources along the screen X Y axes. The function only works when
the SHADE option is turned on. The program displays the light source 1 and 2 and their lighting
directions when the function starts. The user uses the mouse to move the light sources on the screen.
The lighting effect is updated as the user moves the mouse. Press the left mouse button to exit the
function.
The user may activate this function by pressing the SHIFT and LEFT mouse button
simultaneously. Release the mouse button to exit the function.
4.5. LIGHT PROPERTY
This function allows the user to change the light property and the material property for gray shading.
This function only works when the SHADE option is turned on. The program displays the LIGHT
PROPERTY control window as shown in Figure 4.4
Figure 4.4 Light Property Control Option Window
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eta/Post 1.2
CHAPTER 4
1.
EDIT MENU
LIGHT PROPERTY
The light property allows the user to adjust the brightness and shininess of the part by adjusting
the setting of Ambient, Diffuse and Specular light. The LIGHT PROPERTY only works when the
SHADE option is turned on. The user may click and drag the slider in each light property to
adjust the light property. Slide to the right results in more brightness or reflection of the display.
z
AMBIENT
Ambient light is a uniform light source coming from all directions to the part.
z
DIFFUSE
Diffuse light is a parallel light source coming from the light source direction. This light is
reflected evenly from the part surface.
z
SPECULAR
Specular light is similar to the diffuse light except the light is reflected sharply in a particular
direction.
z
RESET LIGHT
Reset the light property to the default setting.
2.
MATERIAL PROPERTY
eta/Post allows the user to modify different material properties for rendering the part. The material
property only takes effect in the SHADE mode with GRAY COLOR option.
z
MATERIAL
User may select the material from the Material drop down list. The available materials are:
aluminum, steel, copper, gold, iron, silver, bronze and rubber. User may assign a material to
selected parts by using the PART ATTRIBUTE function.
z
MATERIAL COLOR
The program provides adjustment for AMBIENT, DIFFUSE and SPECULAR color by
clicking the color box next to the property type. The program displays a control window as
shown in Figure 4.5
eta/Post 1.2
35
EDIT MENU
CHAPTER 4
Figure 4.5 Light Adjustment Control Window
The user may click and drag the marker in the color map window to change the color of the
selected material. The program updates the model display with the new material color in the
graphic display window. It also shows the new material color in the color box on the low left
side of the control window. The user can compare the new material color with the original
color on the right. The user may also click and drag the slider in the vertical bar to adjust the
brightness of the selected material. The RBG values of the material color are shown in the
column on the right side of the control window. The user may change these values to change
the material color. The user may choose any of the four scales to show the RGB values:
Byte, RGB, Hex or HSV. When the desirable color is obtained, click OK to accept the color
and exit the control window. Otherwise, click CANCEL to reject the color and exit the
control window.
z
SHININESS
The user may click and drag the slider to adjust the shininess of the selected material.
z
RESET MATERIAL
Resets the material color to the default setting.
3.
EXIT
Close the light property control window and exit the function.
4.6. COLOR MAP
Eta-Post uses 14 different colors to distinguish parts in the model. This function enables the user to
modify any part color from default setting. The program displays the COLOR MAP control window as
shown in Figure 4.6
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eta/Post 1.2
CHAPTER 4
EDIT MENU
Figure 4.6 Color Map Control window
The user may select any color to modify by clicking on a color block in the color palette. The program
will display a change part color control window as shown in Figure 4.7
Figure 4.7 Part Color Control window
The procedure of changing Part Color is same as in Change Material Color that has been described in
section 4.6.
1.
COLOR SCHEME
This function is used to switch color scheme. User may select color scheme by clicking the
pulling-down menu below. There are three types of color scheme: Style-User Defined, Style-ETA,
Style-LSTC. Default style is Style- User Defined.
2.
SAVE
This function is used to save the COLOR SCHEME.
4.7. PART ATTRIBUTES
The functions in PART ATTRIBUTES control window allow the user to customize the display
eta/Post 1.2
37
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characteristics for selected parts in the model.
There are fives options.
The default PART
ATTRIBUTES control window is shown in Figure 4.8
1.
COLOR
The user may change part color from the color list. Click on the PART COLOR option and select
the parts from the part list window or click the part from the screen. The program will mark the
part name with an asterisk (*) and highlight the parts on the screen. Select a color from the color
table to change the part color. Then click APPLY below the control window. The program will
change the color of the selected part on the screen and the part name in the window. Please see the
Figure 4.8.
Figure 4.8 Part Attributes control window (Part Colour)
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2.
EDIT MENU
MATERIAL
This option allows the user to assign material property to the selected parts when the GRAY
SHADE (Material Color, SHADE) option is turned on. The available materials are: aluminum,
steel, copper, iron, Gold, silver, bronze and rubber. Click on the MATERIAL button and select a
material type from the draw down list. Then the user can select the parts from the part list window
or click the parts from the screen. The program will mark the part name with an asterisk (*) and
highlight the part on the screen. Clicks APPLY and the selected parts will be endued with the
specified material. The changes of part’s material can be show only when the SHADE and GRAY
option are turned on. Please see the Figure 4.9.
Figure 4.9 Part Attributes control window (Part Material)
3.
TRANSPARENCY
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This option allows the user to make the selected parts in transparent when the SHADE option is
turned on. Click on the TRANSPARENCY button and select the parts from the part list window
or click the parts from the screen. The program will mark the part name with an asterisk (*) and
highlight the part on the screen. Clicks APPLY and the transparency slider will be active. The user
may use the transparency slider to adjust the degree of transparency. Slide to the left will make
the selected parts more transparent. The program will show the selected parts transparent when
the SHADE option is turned on. Please see Figure 4.10.
Figure 4.10 Part Attributes control window (Transparency)
4.
WIREFRAME
This option allows the user to display the selected parts in wire frame when the SHADE option is
turned on. Click on the WIREFRAME button and select the parts from the part list window or
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click the parts from the screen. The program will mark the part name with an asterisk (*) and
highlight the part on the screen. The program will not shade the selected parts when the SHADE
option is turned on. Please see Figure 4.11.
Figure 4.11 Part Attributes control window (Wire Frame)
5.
NO CONTOUR
The user may choose not to show contour result in select parts. Click on the NO CONTOUR
option and select the parts from the part list window or click the part from the screen. The program
will mark the part name with an asterisk (*) and highlight the parts on the screen. Clicks APPLY
and the program will not display contour of the selected part during CONTOUR ANIMATION.
Instead, the selects parts will be plotted in gray color. Please seeFigure 4.12.
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Figure 4.12 Part Attributes control window (No Contour)
There are some functional buttons on the Part Attributes window for user to easy operate the parts.
6.
ALL PARTS
Enable the user to select all the parts on the current database.
7.
DISPLAYED
Enable the user to select all the parts that are displayed in the current window.
8.
REVERSE
Enable the user to reverse the selected parts. All the selected parts will be unselected and all the
unselected parts will be selected.
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9.
EDIT MENU
CLEAR SELECTION
Turn all the selected parts to unselected.
10. UNOD
Enable the user to cancel the last selected operation before pressing the Apply button.
11. REDO
Enable the user to cancel the UNDO operation.
12. APPLY
Enable the user to execute the selected operation.
13. REMOVE ATT
Enable the user to remove current specified part properties.
14. SAVE
Enable the user to save the current part attributes to a file. A Select file dialog box will pop up and
prompt the user to specify a name after clicking this button.
15. RECALL
Enable the user to load the previously saved part attribute file and set as the current parts attribute.
4.8. USER VIEW
This function is used to save the current viewing orientation and recall the previously saved view. User
may save up to 10 views in a session. The program displays a control window as shown in Figure 4.13
Figure 4.13 User View control window
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1.
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SAVE VIEW
Save the current viewing orientation. The program assigns a default view name as shown in
Figure 4.14. User may enter any view name in the VIEW NAME field. Click OK to save the
current viewing orientation, or click CANCEL to abort the save operation.
Figure 4.14 View Name control window
2.
RECALL VIEW
Recall the previously saved viewing orientation. Click a VIEW NAME in the view list and then
click RECALL. The program will display the model according to the viewing orientation saved
under the selected VIEW NAME.
3.
DELETE
Delete the previously saved viewing orientation. Click a VIEW NAME in the view list and then
click DELETE to delete the saved view.
4.
EXIT
Closes the SAVE VIEW control window and exits the function.
4.9. BACKGROUND COLOR
This function allows the user to select a color from color palette as the background color in the graphic
display window. Once the function is selected, the program displays a color palette as shown in Figure
4.15
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Figure 4.15 Background Color Palette
The user may select any color in the palette as the background color. The program will change the
background color immediately and exit the function as the color is selected. Press the ESC key to exit
the function without selecting any color.
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5
5. TOOL
The functions in this menu are shown in Figure 5.1. The user can define section cut, mirror result,
define active window, trace node and define node curve.
Figure 5.1 Tool Menu
A detailed description of each function and corresponding submenu is given in the following section.
5.1. SECTION CUT
This function displays the section cut of a finite element model with a defined plane intersecting the
elements. The functions in SECTION CUT control window are shown in Figure 5.2. DEFINE CUT
PLANE is the only function available when the SECTION CUT function starts.
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Figure 5.2 Section Cut Operation
5.1.1. DEFINE CUT PLANE
The section plane is the U-V plane of the user defined local coordinate system. The local coordinate
system may be defined by selecting one, two or three nodes from the model.The program displays a
Control Option window as shown in Figure 5.3. The program also changes the displayed model to wire
frame mode in gray color.
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Figure 5.3 Define Cut Plane
1.
ONE POINT
Enter a X,Y,Z coordinate to the text box under Coordinate Group manually and then click Apply
Input Value button Or select a node by cursor in graphic area to define the origin of the LCS, then
select a global direction as the local W axis and click EXIT. The global direction may be either +
or – X (Y or Z) axis as listed in Figure 5.1.2. The local coordinate system will be defined at the
first node with the local W axes following the selected direction and U, V axes parallel to the other
two global axes.
2.
TWO POINTS
Enter a X,Y,Z coordinate to the text box under Coordinate Group manually and then click Apply
Input Value button Select the first node to define the origin of the LCS and the second node to
define the local W-axis, then click EXIT to define the LCS. The local coordinate system will be
defined at the first node with local w-axis aligned with the vector connecting the first and the
second node.
3.
THREE POINTS
Enter a X,Y,Z coordinate to the text box under Coordinate Group manually and then click Apply
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Input Value button Select the first node to define the origin of the LCS. Enter a X,Y,Z coordinate
to the text box under Coordinate Group manually and then click Apply Input Value button select
the second node to define the local U axis and the third node to define the U-V plane. The local V
and W axis will be computed according to the right hand rule.
Once the local system is defined and accepted, the program will display the section lines in part color
that represent the section cut of the model in the u-v plane. The program will activate other options as
shown in Figure 5.4 for the user to change or operate the cut section.
Figure 5.4 Section Cut Operation
5.1.2. CLEAR SECTION CUT
This function enables the user to erase the section cut from the display window.
5.1.3. NORMAL VIEW
This function enables the user to view from the normal direction of the cut plane.
5.1.4. SECTION CUT OPTIONS
This function controls the display and export of the section cut. Refer to Figure 5.5 for the available
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options.
1.
CUT PLANE
The default number of cut planes is 20 if ALL PLANE option is selected. This means there will be
20 cut planes equally spaced along the local W direction. If the CUR.PLANE is selected, the
current section cut will be exported when select the function EXPORT SECTION CUT. If the
ALL PLANE option is selected, all 20 section cuts will be exported when select the function
EXPORT SECTION CUT.
Figure 5.5 Section Cut Option
2.
ARC FIT
This function will search and label all the arcs along the section line with the radius between the
Max. Radius and the Min. Radius. If the DISPLAY is toggled on, the arcs labeled with radius will
be displayed on the screen. The result of ARC FIT displays is shown in Figure 5.6.
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Figure 5.6 The result of ARC FIT
z
MAX RADIUS
Set the maximum arc radius that can be displayed.
z
MIN RADIUS
Set the minimum arc radius that can be displayed.
z
RADIUS DEV.
Set the tolerance between two adjacent arcs to merge.
z
MIN CHORD
Set the minimum chord length that can be displayed.
5.1.5. EXPORT SECTION CUT
This function allows the user to export all the section lines to a NASTRAN file. The number is
controled by Cut Plane group options as shown in Figure 5.5, The program displays a Select File dialog
window as shown in Figure 5.7.
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Figure 5.7 Export Nastran File
5.1.6. SECTION VALUE CURVE
This function is only enabled for the section cut in contour animation. Click SECTION VALUE
CURVE to display a graph window containing the section curve. Refer to Figure 5.8 for a sample
graph window. The abscissa is the arc length of the section and the ordinate is the corresponding
contour value. Its zero point is correspondingly marked out in graphic area.
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Figure 5.8 A Section plus curve window
5.1.7. SECTION CURVATURE CURVE
This function is used to display section curvature curve. Click SECTION CURVATURE CURVE to
display graphic window that includes section curvature curve. See Figure 5.9. The abscissa is arc length
of section curve and the ordinate is the corresponding curvature.
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Figure 5.9 Section Curvature Curve
5.1.8. MEASURE ARC LENGTH
This function allows user to measure arc length of the same section line. User may left click mouse to
select two nodes on any section line, selected nodes are marked with node number. When two nodes
are selected, program displays arc length, highlight it on the screen and output relevant information in
information window. See Figure 5.10.
Figure 5.10 Measure Arc Length
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5.1.9. MOVE SECTION BY MOUSE
This function allows the user to move the section cut location by using the mouse. The movement may
be translation along the local W axis or rotation about the local W axis.
z
TRANSLATE
Click the MOVE SECTION BY MOUSE option and click MOVE SECTION BY MOUSE.
eta/Post displays a Control Window to allow the user to define the reference point. Click
DEFINE REFERENCE POINT to select a node in the current section as the reference node.
Or click PREVIOUS POINT to use the previously defined reference point. The program
draws a line along the local W axis as the directional line. Move the mouse along the
directional line to obtain the new section cut nearest the cursor. Click the left mouse button
to accept the new section and exit the function.
z
ROTATE
Click the MOVE SECTION BY MOUSE option and click MOVE SECTION BY MOUSE.
eta/Post displays a Control Window to allow the user to define the rotational axis. Click
DEFINE ROTATION AXIS to select two nodes in the current section as the W-Axis. Or
click PREVIOUS AXIS to use the previously defined rotational axis. Move the mouse along
the directional line to obtain the new section cut. Exit the Control Option to accept the UAxis, at this time the user is allowed to drag mouse, the section cut will rotate along the UAxis.
z
MOVE OR ROTATE SECTION BY INPUTING DISPLACEMENT
This function allows user to input offset value to move section position. Displacement value
is based on cutting section, enter offset value and click GO button. Section translates or
rotates about defined local W-axis.
5.1.10. DISPLAY OPTIONS
z
WHOLE MODEL
Whole model will be displayed after exit from the section cut menu.
z
SECTION ONLY
Only the section line will be displayed after exit from the section cut menu. This option is the
default display option when the user uses Section function.
z
PARTIAL MODEL
This function allows user to display a portion of the model on the one side of the section line
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after exit from the section cut menu. If this option is selected, the program will prompt the
user to select the side about the section line. The program will display only the selected
portion of the model on the screen. Figure 5.11 shows a typical display of PARTIAL
MODEL option.
Figure 5.11 An Example for PARTIAL MODEL display
5.1.11. SECTION LINE POSITION
This function provides two options for the user to decide the section plane is fixed or moved.
z
FIXED
If the user selects this option, the section cut plane is fixed. The section cut will be made
from the model in each time step intersecting the fixed section plane.
Depending on the
relative movement between the model and the cut plane, the section cut pattern may be
different between time steps as the model is passing through the section plane. The result
shown in the section may be cut from different elements between time steps.
z
MOVED
If the user selects this option, the section plane is moved with the model. The section cut is
always made to the same elements intersecting the section plane between time steps. This
will assure the result shown in the section is always cut from the same elements during the
animation.
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5.2. CONSTRAINT MOTION
This function enables the user to define a reference point for animation. The user may select any node
in the model as the reference point by the function SELECT REFERENCE NODE. The user may also
select any or all translation degree of freedom (X, Y and Z) to constrain the motion. Figure 5.12 shows
the dialog window of the Constraint Motion.
Figure 5.12 Constraint Motion Dialog Window
The referenced node will be stationary in the constrained direction during the animation. The rest of the
model will be displaced relative to the reference node.
Figure 5.13 Constraint Motion Dialog Window
Note: When Axis is selected as the constraint axis, the function will be labeled with asterisk as
shown in Figure 5.13 . When Show Reference Node is clicked, the function will be labeled
with asterisk. The program labels the reference node with a circle during animation.
5.3. MIRROR RESULT BY XYZ
This function allows the user to define a plane to mirror the analysis result. Three mirror planes are
available: XY PLANE, YZ PLANE and ZX PLANE as shown in Figure 5.14.
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Figure 5.14 Mirror Result Control Option Window
The following example is to mirror a quarter model and result as shown in Figure 5.15. After selecting
MIRROR RESULT BY YZ PLANE, the program mirrors the model and result as shown in Figure 5.16.
Figure 5.15 Example of a quarter model and result
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Figure 5.16 Mirrored model and result by YZ Plane
Press the CLEAN MIRROR RESULT in the Control Option Window to remove the mirrored model
and result.
z
DEFINE LOCAL CS
This function is used to mirror the model based on local UVW plane. Process of Define Local CS
is the same with Define Cut Plane. See DEFINE CUT PLANE in chapter 5.1.
5.4. FACE REFLECTION LINE CHECK
This function simulates reflection model irradiated by several tubular light sources which are parallel
distributed on one plane. Formed strips as zebra pattern on the model face are used for examine
leveling of the surface.
Control Window is as Figure 5.17. After entering this function, strip automatically maps on the model
surface. Original light source plane is the global X-Y plane. The reference point of the plane locates on
Z axis direction in the center of the model. Light source width and space are automatically set
according to the model size. User may adjust the amount, direction, width and space of light source to
achieve different examination goals. The examination result is show as Figure 5.18. Strips are
distributed more straightforward and even on smooth region of the model. In scraggly region of the
model, strips are distorted and are distributed uneven. The degree of distortion is direct ratio to the
degree of the scraggliness.
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Figure 5.17 Face Reflection Control Window
1.
LIGHT SOURCE PARAMETERS
z
ORIENTATION
Setup light source orientation. There are X, Y and User Defined options. Default setting is X.
X and Y indicates light tube axis orientation is set at global X and Y direction. After selecting
User Defined, user may drag mouse to rotate light tube in its plane, left click or right click
mouse to confirm and exit.
z
NO.OF STRIPS
Setup number of strips,default number is 10.
z
STRIP WIDTH
Setup strip width.
z
SPACING
Setup strip spacing.
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Figure 5.18 Face Reflect Examination Result
2.
STRIP CONTROL
z
AUTO FILL
Select this function to automatically reset strip width and spacing according to the current
model size and light tube plane position to make strips filled on the model.
z
SHOW LIGHT STRIP
Select this function to force re-plotting the current examination result.
z
MOVE LIGHT STRIP
Select this function, user can move mouse to move light strip, left click or right click mouse
to confirm and exit.
z
CHANGE LIGHT DIRECTION
Select this function to rotate the light source plane, the normal direction of the light source
plane will dynamically rotate around the axis of the light source when the cursor is moved up
or down, and the rotate center is the model center. Left click or right click mouse to confirm
the result and exit. If the main part of model is not located on the global X-Y plane, user may
use this function to adjust the light source plane to a suitable position.
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z
TOOL
REVERSE CONTRAST
Select this function to reverse the color of the light and shade region.
3.
FRAME
List all frames information of the current model. If user clicks one frame, then program re-plots
strips result according to data of this frame.
4.
EXIT
Exit the function.
5.5. DEFINE ACTIVE WINDOW
This function allows the user to display a portion of the model for more detailed viewing. The user
defines the desired area. eta/Post displays the elements with the analysis result as active window.
Other portion of the model will be masked and became inactive.
The user can define the Active Window by Cursor, Drag Window, Polygon Freehand and Displayed.
Or can use Undo, Redo, Clear Active Window to reset active window. See the Control Option shown in
Figure 5.19. After define, click Exit to quite Define Active Window.
Figure 5.19 Define Active Window Control Window
Click CLEAR ACTIVE WINDOW from the TOOL Pull-down menu to remove the defined active
window. The program will display the whole model.
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5.6. DEFINE NODE TRACE
NODE TRACING allows the user to select a set of nodes to be traced during animation. Dialogue box
shown in Figure 5.19 prompts user to select node. A trace is a line or track that shows the path that the
node takes during the animation. A typical Node Trace is show in Figure 5.21.
Figure 5.20 Select Node Control Window
Figure 5.21 The Node Trace
Click the CLEAR NODE TRACE from the TOOL Pull-down menu to remove all of the currently
defined traces.
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5.7. PART VALUE CURVE
This function allows the user to plot the result of the selected parts.
The program shows the time
change curve of the maximum and minimum value in the selected parts in a time history curve in a
graph window. The function only works in contour animation. The program displays a dialog window
as shown in Figure 5.22 and prompts the user to select the desired parts. Figure 5.23 shows a typical
Part Value Curve of thickness animation.
Note: The user should select the formed part (blank) as the tool parts don’t have results.
Figure 5.22 Select Part Control Option
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Figure 5.23 A typical Part value curve
5.8. NODAL VALUE CURVE
This function allows the user to plot the result in a time history curve of the selected nodes in a new
graph window. The dialogue box see Figure 5.24. This function is only activated in contour animation.
After selecting desired nodes, the program shows the node curve result as shown in Figure 5.25.
Figure 5.24 Select Node Control Window
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Figure 5.25 Node Curve Result
5.9. ELEMENT VALUE CURVE
This function allows the user to plot the result of the selected elements in a time history curve in a new
graph window. The function only works during contour mode with ELEMENT RESULT options
selected. The procedure of using the function is same as NODAL VALUE CURVE as descipbed in
Section 5.8.Figure 5.26.shows a typical Element Value Curve.
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Figure 5.26 A sample of ELEMENT VALUE CURVE
5.10. NODAL DISPLACEMENT CURVE
This function helps user to draw nodal displacement curve of the selected nodes. User may select
multiple displacement components at the same time. The dialogue box is as Figure 5.27. After selecting
desired nodes, program plots nodal displacement curve in the new curve window. See Figure 5.28.
Figure 5.27 User Select Control Window
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Displacement component curves with (*)in Figure 5.27 are drawn at the same time. Default setting
is to display 3 displacement components and global displacement. Click any one of the components to
toggle off it, click once more time to toggle on it.
Figure 5.28 Nodal Displacement Curve Example
5.11. PART DISTANCE
This function is used to calculate the distance between two parts and plots the result in contour. Figure
5.29 is control window. User needs to set Source part and Destination part. The calculation result plots
on the Source part.
Figure 5.29 User Control Window
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TOOL SET
z
SOURCE
Select source part for distance calculation.
z
DESTINATION
Select destination part for distance calculation.
2.
OPTION
z
USE ELEM NORMAL
if toggle off this option, calculated distance is a absolute value between the elements. If
toggle on this option, calculated distance considering the normal direction of two parts. The
distance value can be positive or negative. Figure 5.30 shows the result when the option is off
while Figure 5.31 shows the result when the option is on.
3.
RESULT
z
EXECUTE
Calculates the distance between two parts and plots the contour result.
z
CLEAR
Clears calculated contour result.
4.
Exit
Exit this function.
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Figure 5.30 Calculation Result When the Option is off
Figure 5.31 Calculation Result when the Option is on
5.12. PART INTERFERENCE CHECK
It is used to examine the interference status between parts. Figure 5.32 is Control Window.
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Figure 5.32 User Control Window
1.
BY PART GROUPS
When selecting the option, user needs to specify master part group and slave part group. This
function is used to check the interference status between two part groups and there is no checking
of interference status of parts within part groups. When the option is not selected, user may select
any parts, this function is used to examine the interference status between any two parts.
2.
REFERENCE
Under some cases, initial model has interference in itself, and user may need to ignore or hold this
interference.
z
SET
Throw off the interference of initial model from the current interference result.
z
CLEAR
Calculate all interference result without considering initial model interference in the current
step.
3.
CONTROL PARAMETERS
z
INNER
When selecting this option, this function is used to check if there is penetrable interference
between part elements.
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z
TOOL
OUTER
When selecting this option, this function is used to check if there is contact interference
between part elements.
z
ALLOW GAP
This option is only used for outer interference. The value is maximum allowable gab criterion
to distinguish the contact interference.
z
TOLERANCE
It is used to control calculation accuracy.
4.
CONSTANT INTERFERENCE CHECK
z
KEPP CHECK
After selecting this option, program keep checking interference when plotting each frame
during animation. It is mainly used in animation, the animation stops automatically every
time interference is checked out.
5.13. EXPORT BOUNDARY LINE
This function helps user to export boundary line of part to file. The dialogue is shown as Figure 5.33.
Click Select parts to select parts, and then click exports boundary lines to export the boundary line. Set
file path and name in the following opened dialogue box. (the file format of boundary line file is Line
Data).
Figure 5.33 Export Boundary Line dialog window
5.14. MODEL SUMMARY
This function enables the user to display the statistics regarding elements and nodes in the model.
Figure 5.34 shows a sample model summary.
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Figure 5.34 Model Summary
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6
6. OPTION
The functions in this menu are shown in Figure 6.1. The user can customize the appearance in the
graphic display window.
Figure 6.1 Tool Menu
A detailed description of each option is given in the following section.
6.1. AXIS (toggle)
The XYZ coordinate system is displayed in the lower left corner of the display window. This option
allows the user to toggle the axes on/off.
6.2. TITLE (toggle)
The title of the result file is displayed in the upper left corner of the display window. This option
allows the user to toggle the title on/off.
6.3. COLOR BAR(toggle)
This function toggles the color guage at the right corner of screen on and off.
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6.4. MAX-MIN MARKER(toggle)
This option is used to control marked physical valute in screen graphic area. Normally use * to represent
the max value and use o to represent the min value.
6.5. LOGO
This function toggles the Company Logo( eta) at the lower left corner of screen on and off.
6.6. NORMAL COLOR (toggle)
This option allows the user to display the part color on positive side and gray color on the negative side
of the finite element model when PLATE NORMAL option is selected in the DISPLAY OPTIONS
window. This option is essential for the user to visually check the part for reversed normal of the finite
element mesh. Figure 6.2 shows a part displayed with NORMAL COLOR and PLATE NORMAL
option.
Figure 6.2 Typical display with Normal Color and Plate Normal option
6.7. ELEMENT ORIENTATION (toggle)
This option shows a vector from the first node to the second node of each plate element. It allows the
user to visualize the direction of the element location U axis and local Z axis (according to the right
hand rule) . It is useful to check the orientation of the composite material. Figure 6.3 shows a typical
display of a part with ELEMENT ORIENTATION option.
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Figure 6.3 Typical display with Element Orientation option
6.8. ACTIVE CONTOUR RANGE
When this function is selected, the contour scope in color guage changes according to part scope in
graphic display area. When the function is not selected, the contour scope is the whole model scope,
which is the displayed parts in graphic area.
6.9. OVERALL CONTOUR RANGE
When selecting this function, the contour scope in color bar is all frame scope. When the function is not
selected, the contour scope in color bar is only the current frame scope.
6.10. DEFINE ROTATE CENTER
When this function is selected, user can define rotation center. When the function is not selected,
program automatically define rotation center.
6.11. APPLY VPG LAYOUT
eat/POST supports several post processor software, such as DYNAFORM, VPG,etc at the same time.
Default layout is DYNAFORM interface layout. When selecting this option, eta/POST interface layout
adopts VPG post processor interface layout.
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6.12. APPLY SECOND SHADING
When some graphic cards cannot work properly, this option is required to apply second shading. Under
general situation, this function is not necessary.
6.13. APPLY FADED BACKGROUND
When selecting this option, morphing color is adopted as the background. When it is not selected,
background is single color.
6.14. APPLY LOCAL LIGHT
When this option is selected, local light source is selected. Or to click SHIFT and left button of mouse
at the same time to adjust the positions of two local light sources. Otherwise global light source is
adopted. At this time click shift button and left button of mouse at the same time to adjust global light
source direction.
6.15. APPLY MOUSE TRACKING
When selecting this option, eta/post can list value of elements or nodes that are corresponding to
displayed cursor position.
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7
7. POSTPROCESS
The functions in the POSTPROCESS menu allow the user to graphically display and manipulate
analysis results. There are 4 functions shown in the post-processing tool bar as shown in Figure 7.1a
and 11 special functions for eta DYNAFORM as shown in Figure 7.1.b.
a) General Post-process function icons
b) The special icons for eta/DYNAFORM
Figure 7.1 Post-process functional icons.
Once a function in the tool bar is selected, the POST-PROCESSING CONTROL WINDOW appears.
Each function allows the user to graphically display and manipulate a specific result for stamping
simulation. The user selects the desired PLOT STATE, TIME STEPS, FRAME RANGE and
COMPONENTS to plot or animate the result.
Note: To load LS-DYNA result files and to activate the post process menu, see FILE/OPEN in
Chapter 3 FILE MANAGER.
Note: The user will not have access to have the control window when other control option windows
are active.
A detailed description of each function is given in the following sections.
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GENERAL POST-PROCESS FUNCTION ICONS
The post-process function icons are always displaying on the icon bar of Post-Processor after the user
load the result files from LS-DYNA or NASTRAN. These are common functions for most finite
element analyses.
7.1. UNDEFORM
This function is used to display the un-deform model shape.
7.2. DEFORM
The functions in this menu animate the deformed shape of the model in real time and display
displacement of an individual step. The options are shown in Figure 7.2.
Figure 7.2 Deform control window
7.2.1. DEFORM OPERATION
1.
SHOW UNDEFORM SHAPE
This function enables user to toggle the undeformed geometry of the model on/off. The deformed
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shape plot is displayed in its original colour. The plot of the undeformed shape is displayed in
white over the deformed shape.
2.
SCALE FACTOR
This command adjusts the default scale factor of the deformed shape plot. The default is 1.
It scales plot components to a user-defined value allowing the user to magnify or minimize their
visual display. For example, if the plot state is set to deformation, the user could magnify the
deformation by a factor of ten to see small deformation not readily visible during animation.
7.2.2. FRAME OPERATION
This function allows the user to select desired frame(s) to plot (single frame) or animate (more than one
frame) deformation shown as in Figure 7.3. There are 6 options in it.
Figure 7.3 Frames Operations
1.
FRAMES
The FRAMES window allows the user to select individual frame(s) for the plot or animation. The
frames selected are highlighted in blue. When frames are selected in other options, the
corresponding frames are highlighted in the FRAME window.
z
SINGLE FRAME
This function allows user to pick single frame, and eta/Post plots the deformation
simultaneously.
z
ALL FRAMES
Once All Frames is picked, all frames in the list window are selected for animation.
z
EVEN FRAMES
Once Even Frames is picked, even frames in the list window are selected for animation.
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ODD FRAMES
Once Odd Frames is picked, odd frames in the list window are selected for animation.
z
SELECT FRAMES
Once Select Frames is picked, eta/Post allows user to select any frames for animation. Left
mouse button picking works with CTRL and SHIFT to allow the user to select any desired
frames in the list window.
z
RANGE
The RANGE window provides the to user multiple options for determining the frames to be
animated as shown in Figure 7.3. The RANGE option allows the user to define a range of
frames with an increment. The data field for the RANGE option is not accessible until the
option is selected.
After entering the desired values, press ENTER to activate the PLAY
2.
button.
RESET
This function clears all previously selected frames.
7.2.3. ANIMATION OPERATION
This function allows the user to animate the selected frames as shown in Figure 7.4
Figure 7.4 Animate
1.
PLAY
eta/Post starts to animate the selected frames. After clicking the PLAY button, the other three
buttons, PAUSE, STOP and EXPORT are activated as shown inFigure 7.5.
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Figure 7.5 Play Status
2.
PAUSE
Pause the animation. In this mode, the four other functions are enabled to use as shown in Figure
7.6.
Figure 7.6 Pause Status
3.
FIRST FRAME
Display the first frame
4.
PREVIOUS FRAME
Display the previous frame
5.
NEXT FRAME
Display the next frame
6.
LAST FRAME
Display the end frame
7.
STOP
Stop the animation.
8.
WRITE MOVIE FILE
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This function writes an AVI file or a E3D file from the current animation. An AVI file is a
Microsoft multimedia file that provides a means to store a series of 2D images for animation. An
E3D file is an ETA proprietary file that provides a means to store the true 3D images that can be
played by eta/3D Player.
During Animation, click the WRITE MOVIE FILE
button.
Eta/Post displays the
WRITE FILE window for the user to choose the file type and enter the name and location for the
file. Select AVI video (*.avi) or E3D Player file (*.e3d) as the file type, enter a file name and
navigate to the desirable directory. Default directory is where the d3plot files are loaded.
After entering the name and location of the file, click the SAVE button in the WRITE FILE
window. For AVI file type, eta/Post displays the SELECT COMPRESSION FORMAT for the
user to select the compression type and quality.
The program writes the AVI or E3D file for the current animation.
9.
FRAME NUMBER
After the animation is paused, this function allows the user to drag the slider to the desired frame
to display the result.
During animation, the frame number is changed automatically according to the current time step.
10. FRAMES/SECOND
This function allows user to adjust the speed at which the animation is running by altering the
number of frames per second. The user can drag the slider to adjust the frame rate. Once the
frame rate is selected, the animation will continue at this frame rate until it is reset or stopped.
7.3. CONTOUR
The functions in this menu enable the user to animate the element stress/strain and related results in
real time. The color bar, located on right hand side of graphic window, displays the corresponding
contour values. The location of the highest contour value in the model is labeled with an asterisk (*)
and the lowest is labeled with a zero (0). The functions in this menu are shown in Figure 7.7 Select
Stress-Strain or Displacement in Contour Operation firstly, and then select Current Component to
operate. The operation process is shown as follow.
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Figure 7.7 Animate Contour control window
7.3.1. SELECT COMPONENT
The contour animation can show STRESS/STRAIN and DSIPALCEMENT results. The user selects
the type of contour variable displayed during the plot/animation. The selected type of variable
determines the components displayed in the CURRENT COMPONENT drop down list.
SIGMA_XX
PRIN_STRESS2
SIGMA_YY
PRIN_STRESS3
SIGMA_ZZ
MAX_SHEAR_STRESS
SIGMA_XY
PRIN_STRAIN1
SIGMA_YZ
PRIN_STRAIN2
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SIGMA_ZX
THINNING
PLASTIC_STN
NORM_STRAIN
BEND_MONMENT_MXX
EPSON_ZZ
BEND_MONMENT_MYY
EPSON_XX
BEND_MONMENT_MZZ
EPSON_YY
SHEAR_RES_QXX
EPSON_XY
SHEAR_RES_QYY
EPSON_YZ
NORMAL_RES_NXX
EPSON_ZX
NORMAL_RES_NYY
ENERGY
NORMAL_RES_NXY
MAX_VONMISES
THICKNESS
MEAN_STRESS
EPSON_XY
PRIN_STRESS1
EPSON_YZ
PRIN_STRESS2
EPSON_ZX
MEAN_STRESS
ENERGY
PRIN_STRESS1
MAX_VONMISES
PRIN_STRESS2
MEAN_STRESS
PRIN_STRESS3
PRIN_STRESS1
If the DISPALCEMENT type is selected, the supported components are listed below:
DISPLACEMENT_X
VELOCITY_Z
DISPLACEMENT_Y
VELOCITY_TOTAL
DISPLACEMENT_Z
ACCELERATION_X
DISPLACEMENT_TOTAL
ACCELERATION_Y
VELOCITY_X
ACCELERATION_Z
VELOCITY_Y
ACCELERATION_TOTAL
7.3.2. CURRENT LAYER
The user can select any layer in the element to show the result. The layer is corresponding to the
integration point through the element thickness. Middle layer is the default setting in the program.
7.3.3. INCREMENT
This function is used to display difference value between two neighboring frames as result.
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7.3.4. UNDEFORM
This function allows the resultant contour to be displayed on the un-deformed, original mesh. Refer to
Figure 7.8 and Figure 7.9 to compare the result displayed on the un-deformed mesh and deformed mesh.
Figure 7.8 Contour display on un-deformed mesh
Figure 7.9 Contour display on deformed mesh
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7.3.5. ELEMENT RESULT
This option allows the user to show the result by element instead of contour interpolated by nodes.
7.3.6. CONTOUR SETTING
This function will start the Contour Bar Options Control Window shown as Figure 7.10. The user can
use these functions to customize the contour setting for animation.
Figure 7.10 Contour Setting box
z
REVERSE CONTOUR BAR
This function allows the user to reverse the color of the contour bar for animation. The result of
the reverse contour bar is shown in Figure 7.11.
Figure 7.11 The Reverse contour Bar result
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CONTOUR RANGE
The user can define the contour range for the contour bar by entering the values for the minimum
and maximum range. If the entered value is lower than the maximum, the contour color of the
result above the range is displayed in darker color than the top box in the contour bar. If the enter
value is higher than the minimum value, the contour color of the result below range is displayed in
dark color of the bottom box in the contour bar. The user may change the color of these two color
boxes by clicking the color box in the CONTOUR BAR OPTION window. Figure 7.12 shows a
typical contour plot with user defined color range.
Click the APPLY button to update the contour display according to new contour range.
Figure 7.12 A typical contour plot with Contour Range
z
RESET CONTOUR RANGE
This function resets the contour value range to the default maximum/minimum values of the entire
animation.
z
CONTOUR MODE
There are four types of color settings.
RGB (red, green, blue)
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RGBM (red, green, blue, magenta)
RG (red, green)
GRAY
z
CONTOUR LEVEL
The contour level can be set from 2-20 levels. The program defaults to CONTINUE. If the user
sets the contour level with any value 2-20, the contour color is displayed as solid color for each
contour value in the contour bar. Figure 7.13 shows a contour plot with 12 colors in RGB mode.
Figure 7.13 An Example for Contour plot of 12 colors
z
NUMBER OF DECIMAL
Number of decimal can be set from 1 to 7. default value is 2. Click APPLY button to renew
contour according to the new number of decimal.
z
FLOAT VALUE TYPE
There are two types of float value: E(default), F. E stands for scientific notation and F stands for
decimal notation. Click APPLY button to renew contour according to the new float value type.
7.3.7. EXPORT CONTOUR LINE
This function allows the user to export the contour line (only when the CONTOUR LEVEL is not
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CONTINUE) to a DYNAFORM Line Data file.
eta/Post prompts the user to enter the file name. After entering the file name and clicking SAVE button,
the contour lines will be saved to the defined file.
7.3.8. LIST VALUE
This function lists the contour value of selected nodes or selected element (if ELEMENT RESULT is
selected, then list element contour value). For example, list node value in the following steps:
Click the LIST VALUE function in the CONTOUR CONTROL WINDOW.
The Control Option window is displayed with Select Node Option shown as Figure 7.14.
Figure 7.14 Select Node Control Option
Select the desired option form the list. The default setting is by mouse pick. The user can also select
nodes by dragging window, polygon or free hand region.
Once the nodes are selected, the highest 10 values are listed at the lower left corner of the GRAPHICS
DISPLAY WINDOW as shown in Figure 7.15.
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Figure 7.15 List Node Value
A Control Option Window appears shown as Figure 7.16. These functions control the position and
number of contour values listed.
Figure 7.16 List Value Control Option
z
HIGHEST
The set of nodes with the highest value are listed.
z
NEXT HIGHEST
The set of nodes with next highest value are listed.
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NEXT LOWEST
The set of nodes with next lowest value are listed.
z
LOWEST
The set of nodes with the lowest value are listed.
z
LIST PER PAGE
The function prompts a data control window that allows the user to enter the number of the listed
nodes.
z
SET LIST POSTION
This function allows the user to place the list window by the cursor pick.
Other functions are common to those in the DEFORM animation.
7.4. VECTOR
The functions in this menu animate the analysis results with vectors in real time. The options are
shown inFigure 7.17.
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Figure 7.17 Vector Operation control window
7.4.1. SELECT COMPONENT
There are four types of component, DISPLACEMENT, VELOCITY, ACCELERATION, STRESS and
STRAIN in the function.
If DISPLACEMENT, VELOCITY or ACCELERATION is selected, the CURRENT LAYER is
disabled, and the CURREN COMPONENT is enabled used. The user can select any component or any
combination of them from the list.
If STRESS or STRAIN is selected, the CURRENT LAYER is enabled and the CURRENT
COMPONENT is disabled. There are MIDDL, TOP and BOTTOM available in the CURRENT
LAYER.
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7.4.2. BY ELEMENT SIZE AND SCALE FACTOR
This function is used to control the size of the vector.
BY ELEMENT SIZE will scale the vector size to fit within the element.This option is only efficient to
STRESS of STRAIN. If select STRESS of STRAIN, then BY ELEM SIZE is activated. If select
DISPLAYCEMENT, VELOCITY or ACCELERATION, then BY ELEM SIZE is closed.
SCALE FACTOR allows the user to enter a scale factor to vector length according to the magnitude of
the result.
Note: The SCAL FACTOR is disabled when BY ELEMENT SIZE is selected.
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SPECIAL ICONS FOR eta/DYNAFORM
Those icons are special for eta/DYNAFORM post-processing. If the user opens a result file of a
DYNAFORM simulation, these icons will be displayed in the top of CONTROL WINDOW. This
allows the user to quickly select the type of result to be reviewed by a simple mouse click.
7.5. FLD
This function is used to evaluate the formability of the blank (safety and failure zones). The X and Yaxes in the diagram represent the minor and major strains of each element. The options in this menu are
shown in Figure 7.18.
Figure 7.18 FLD control window
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7.5.1. FLD CURVE OPTION
This function allows the use to define the FLD curve and other parameters for FLD evaluation. The
program displays the FLD CURVE AND OPTION window as shown in Figure 7.19.
Figure 7.19 FLD Curve and Option
1.
DEFINE CURVE BY
z
FLC(From index file)
If user defined FLC curve when pre-processing, program automatically includes FLC curve
in output idx file. Post processor gets FLC curve from idx file default. FLC curve type in idx
file is engineering strain type. If user uses FLC curve with true strain format, when inputting
in pre-processor, true strain transfers into engineering strain format, and then input to preprocessor, or adopts File method to import FLC described in follows..
Detailed information about INDEX (idx) file format refers to APPENDIX A.
z
n,r,t
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If FLC curve not defined in pre-processor, then FLC (From index file) option mentioned
above is not activated. Program obtains n, r, t parameters from idx file default and then gets
the FLC curve approximately according to Keeler’s formula. If user has not assigned idx file,
or does not have *.idx file ( for example user opens result file calculated by older version
DYNAFORM), program adopts a group of default n, r, t parameter to calculate FLC curve.
At this time, user should adjust n, r, t manually to get FLD curve matched blank material.
Following is adopted Keeler’s formula:
FLD 0 = n * ( 23 .3 + 14 .134 * t ) / 21 .0,
0 < t < 2.54 mm ;
FLD0 = n * (20.0 + (20.669 − 1.938 * t ) * t ) / 21.0,
2.54 ≤ t ≤ 5.33mm ;
FLD0 = 75.125 * n / 21.0,
t ≥ 5.33mm .
FLC shape is decided by formula below:
ε maj = FLD0 + ε min * (0.027254 * ε min − 1.1965)
ε maj = FLD0 + ε min * (−0.008565 * ε min + 0.784854)
z
ε min < 0 ;
ε min > 0 .
File
Define FLD curve by importing curve file(*.fld). Figure 7.20 shows an example of FLD file.
User may refer to the format to create fld file. $FORM LIMIT DIAGRAM is necessary
keyword, other keyword is optional. Safety margin defines the distance from the Marginal
curve to the failure curve. Type defines the curve type, 0 for true strain, 1 for engineering, 2
for engineering percent. There is no FLD curve type in the old FLD format, its curve type is
decided by FLD parameter in etapost.config which is configuration file of post-processor
program. So when using old FLD curve, pay attention, make sure that the added type
messages in FLD file or FLD parameter in adjust configuration file match with FLD curve.
Figure 7.20 FLD file format
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CURVE TYPE
The function allows the user to switch the FLD type between the engineering and the true strain
for FLD evaluation.
3.
PARAMETERS
z
FLD0
FLD0 is the lowest point on the failure curve. The user can move the failure curve in Ydirection by entering a FLD0 value.
z
SAFTY MARGIN
The user can define the margin area of the FLD by changing the distance from the margin
curve to the failure curve. The setting for SAFETY MARGIN determines what range of
strain below the FLD is defined as at risk of cracking. Generally, this is set to 10 percent
below the failure curve.
z
ALLOWABLE THINNING
The setting for ALLOW THINNING determines what percent thinning of material in biaxial
mode. Generally, it is recommended to set it to about 30%.
z
ESSENTIAL THINNING
The ESSENTIAL THINNING setting determines what minimum percent thinning of material
is required to determine a required stretch.
z
ALLOWABLE THICKENING
The ALLOW THICKENING setting determines what percent gathering of material is
necessary before the material is defined as wrinkling. This default set at 2%.
4.
CURVE FILTER
FLD divides the whole model into 8 areas based on the formability of the part. Each area is shown
in a unique color. An example of FLD is as Figure 7.21.
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Figure 7.21 An Example of FLD evulation
Any of the area except CRACK and SAFE can be turned off by un-checking the option box under
CURVE FILTER in the FLD CURVE and OPTION window.
5.
SHOW MODE LINE (toggle)
Toggles ON/OFF the forming mode lines in the FLD window.
7.5.2. EDIT FLD WINDOW
This function allows the user to change the size and location of the FLD window by a drag window.
Once the function is selected, the user is prompted to drag a window to define FLD in the GRAPHICS
DISPALY WINDOW. The user may try as many size and location as he wishes until he clicks the
EXIT button in the control window.
7.5.3. FLD REVERSED MAPPING
This function allows the user to trace the elements in the model from the FLD window. The user
moves the curve to a particular point in the FLD window to highlight the corresponding elements in the
model. Click the left mouse button to stop the tracing. The program will label the corresponding
elements with the element and node numbers.
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7.5.4. FLD PATH
This function is used to track selected element strain path in FLD during the whole deform process.
Define Path is used to select required element from the graphic. After defining and exit, program
automatically calculate the strain change path of the selected element deform process and individually
displays it in FLD graphic. See Figure 7.22. Click Clear Path to clear defined strain path, FLD returns
to the default FLD graphic of all parts under current frame
Figure 7.22 FLD Strain Path
7.6. THICKNESS
This function animates the contour of blank thickness to estimate the stamping quality. The program
displays a control window as shown in Figure 7.23.Functions of other buttons see Chapter 7.1 and 7.2.
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Figure 7.23 Thickness Control Window
The use may select THICKNESS, THICKNESS STRAIN or THINNING from the drop down menu to
animate the thickness, thickness strain or thinning of the blank. For thickness contour, the program
automatically switch to REVERSE CONTOUR BAR mode to plot the thinnest area in red and the
thickest area in blue. See the Figure 7.24 and Figure 7.25 for a sample plot of thickness and thinning
contour.
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Figure 7.24 Thickness Contour
Figure 7.25 Thinning Contour
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7.7. MAJOR
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AND MINOR
STRAIN
This function allows the user to display, animate and list the major/minor principal strains. Figure 7.26
show the control window for the Major and Minor Strain function. Functions of other buttons see
Chapter 7.1 and 7.2.
Figure 7.26 Major Strain and Minor Strain
Other functions are common to other functions in the previous sections.
7.8. IN PLANE STRAINS
The functions in this window allow user to animate the principal in-plane strains. The program
displays a control a display window as shown in Figure 7.27. Functions of other buttons see Chapter
7.1 and 7.2.
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Figure 7.27 Strain In-Plane Control Window
The in plane principal strains are displayed in the model as vectors. The value range is displayed in the
CONTOUR BAR.
Other functions are common to the VECTOR function as described in the previous section.
7.9. BLANK TOOL DISTANCE
Blank to Tool distance allows the user to check the distance between a specified tool and the Blank.
User can use this function to check the contact pattern during the forming process by animating the
distance of the blank and tool. Figure 7.28 shows the control window of the function. Functions of
other buttons see Chapter 7.1 and 7.2.
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Figure 7.28 Blank Tool Distance
1.
NORM DIRECTION (toggle)
If the option is selected, the distance between the blank and the tool is calculated from the normal
direction of the selected tool. Otherwise, the distance is calculated from the tool motion direction.
2.
DEFINE TOOL
This function allows the user to select the tool for calculating distance. The program displays the
Select Part Control Option window as shown in Figure 7.29.
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Figure 7.29 Select Part Control Option
User can select part(s) by the cursor pick, dragging window, polygon and free hand region.
3.
BLANK BY ELEMENT
This function allows the user to select elements of the blank by cursor pick, dragging window,
polygon area or free hand area.
After the tool is defined, the user can animate the blank tool distance contour. Figure 7.30 shows a
typical contour plot of the distance between the blank and die at the initial forming step.
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Figure 7.30 Blank and Tool Distance
7.10. CIRCULAR GRID
This function allows user to simulate the circular grid testing in the actual stamping operation. The
program paves the circular grid according to the user’s specification on the deformed blank. The
deformed circles are calculated based on the element strains and display on the deformed blank. Figure
7.31 shows the control window of the Circular Grid function. Functions of other buttons see Chapter
7.1 and 7.2.
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Figure 7.31 Circular Grid
1.
RADIUS
This parameter is used to define the radius of the circle. The default value is calculated by the
element size.
2.
OFFSET
It is the gap distance between two circles in the U and V directions of the circular grid. The default
value is calculated by the element size.
3.
DEFINE U-V DIRECTION
The U-V plane is used to orient the circular grid direction on the blank. Follow the standard
procedure for defining U-V plane.
4.
SELECT CIRCLE
This function allows the user to select the circle to list the strain result. It is only activated after
the animation is started. The result of the selected circle is displayed in the message window in
the following format Please see the Figure 7.32.
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[i]-<46> <Major>=-22.8553(%) > <Minor>=38.4680(%)>
Figure 7.32 A sample plot of Circular Grid
7.11. SKID MARK
Skid Mark function allows user to display any possible impact marks left on the blank by the
tools.Figure 7.33 shows the control window of this function. Functions of other buttons see Chapter 7.1
and 7.2.
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Figure 7.33 Skid Mark Operation
Note:
Before starting the function, there should be a line defined in the current database.
Otherwise, the program will issue a warning message “No lines in database”.
1.
TRACE BETWEEN STEP (toggle)
If the function is selected, one skid line per frame is displayed on the blank. Otherwise, only two
skid mark lines are plotted and displayed, one for the original position in the first frame, the other
is the position for the current frame.
2.
DEFINE DRIVE LINE
This function allows the user to select the drive line(s) by cursor pick, dragging window, polygon
or free hand region. The drive line is usually defined on the tool mesh.
3.
EXPORT SKID LINE
This function allows the user to export the skid line to a line data file. The program displays a
save file dialog window to let the user enter the file name to save the skid line in the
eta/DYNAFORM Line Data format.
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4.
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MEASURE SKID LINE
This function is used to measure distance between skid mark and defined driving line.
Figure 7.34 shows a typical plot of Skid Line result. The first position is labeled with red squares
and the current position is labeled with yellow squares.
Figure 7.34 A sample plot of Skid Mark
7.12. BLANK OUTLINE
This function calculates the outline of the blank in the binder surface (un-deformed blank). It is used to
estimate the necessary blank size to form the part. The calculation is based on the trim line on the part
after the draw-die or spring back simulation. The following steps should be followed.
Read in d3plot files from the DYNA analysis.
Read in a line data file for the trim line using the IMPORT function in the FILE menu. The line data
file should only consist of the trim line(s). If the line data is not available, use the CREATE LINE
function in the EDIT menu to create the trim line.
Select the BLANK OUTLINE function from the icon bar.
The Control Option Window is shown as in Figure 7.35. Click SELECT BY CURSOR to select trim
line(s).
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After desired trim line is selected, click EXCUTE function to calculate the Blank Outline.
Figure 7.35 Select Line Control Option Window
Note: If there is no line defined in the database, the program will issue a message “NO LINES IN
DATABASE”.
Figure 7.36 Trim Line on Final Step of the Deformed Blank
Figure 7.37 Outline on the Undeformed blank
The selected or created trim line will automatically mapped to the original (un-deformed) blank. The
user can estimate the blank size from this outline. Functions of other buttons see Chapter 7.1 and 7.2.
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7.13. EDGE MOVEMENT
The function enables the user to animate movement of the blanks outer edge in real time. A vector is
drawn to show the displacement (including X, Y, and Z orientation) at the boundary nodes of the blank.
The contour bar, located on upper right corner of the graphic window, displays the corresponding
contour magnitude of the displacement vectors. The location of the highest contour value in the model
is labeled with an asterisk (*) and the lowest is labeled with a zero (0). The options for this function are
shown in Figure 7.38:
Figure 7.38 Edge movement control window
1.
DELTA X/DELTA Y/DELTA Z
Those options enable the user to specify the deviation of the referenced boundary line relative to
the original boundary line of the reference frame along the X, Y and Z direction. The defined
value will be added to the edge movement vectors.
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Figure 7.39 Material Float Define
Figure 7.40 X Displacement is 20, the material movement
2.
REFERENCE FRAME
This function enables the user to specify which frame to be used as the referenced to calculate the
edge movement. The program will use the boundary line of this frame as reference to calculate the
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movement vectors. The user can click and slide the slider to select the start frame.
3.
COORDINATION OPTION
There are three check box denotes three different orientation X, Y and Z. For example, if toggle
on the X, it means that only the displacement on X orientation is calculated and plots on the screen.
The user can toggle on all three options one time.
4.
SHOW FLOW
This function is used to open or close the initial blank contour and material flow curve between
boundaries after deform. Default setting is toggled on.
7.14. DEFECT DETECTION
This function is used to detect the surface defect of the deformed blank. The objective is to simulate the
Stone Test in the shop. The control window of this function is shown in Figure 7.41
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Figure 7.41 Defect Detection
DEFECT A, B, C and D are the criteria for the defection. STONE LENGTH is the chord length to
calculate the vertical distance to the selected elements. SCAN INCREMENT is the distance between
the measurement.STONE ORIENTATION is the selected element coordinate position, click the
pulling-down menu on the right of Stone Orientation, option X (default), Y, XY can be selected.
The user should click SELECT ELEMENTS to select elements for processing.
The Select Elements option window is shown in Figure 7.42.
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Figure 7.42 Select Elements Option
After select desired elements, select Exit to exit the function.
The SHOW DEFECT, CLEAR DEFECT and FRAME functions will be activated as shown in Figure
7.43.
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Figure 7.43 Defect Detection
Click any single fram to show defect contour. See Figure 7.44. The contour color is based on the
surface defect over the stone length. The red color shows the area on the mesh with the highest defect
level.
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Figure 7.44 An Example of Detect Defection
7.15. BLANK MOVEMENT
This function is used for real-time animation of movement contour of blank compared to its initial
statues. It is mainly used to check spring back value. SeeFigure 7.45
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Figure 7.45 Blank Distance
1.
REFERENCE FRAME
This function is used to specify reference frame. Program calculates blank distance between the
reference frame and any specified frame.
2.
COORDINATION OPTION
There are three check box denotes three different orientation X, Y and Z. For example, if toggle
on the X, it means that only the displacement on X orientation is calculated and plots on the screen.
The user can toggle on all three options one time. See Figure 7.46.
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Figure 7.46 Blank Movement Nephogram
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8
8. GRAPH
The GRAPH function is an independent module than other functions in eta/Post. This function enables
the user to visualize time history result from LS-DYNA analysis in graph form. In addition, the
GRAPH function offers a wide range of tools to help the user better understand and convey the results.
Features include the ability to manipulate the display settings (labels, colors, etc) and a host of
advanced filtering techniques (FIR, SAE, Butterworth, averaging, etc.) and calculation of different
results. The detailed descry-;option of available functions in GRAPH is given in the following
sections.
8.1. START UP
The user can activate the GRAPH function by clicking the GRAPH icon on the toolbar. The program
will display the graph control window for the user to load the time history result file. The graph control
window is shown in Figure 8.1.
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Figure 8.1 Graph start up window
8.2. RESULT FILE LOAD
The function allows the user to read result files form LS-DYNA analysis into the current database. The
user can input LS-DYNA ASCII, State and Time data files. Click the LOAD button and the program
pops up the Select File dialog box for user to select a database file. The figure is shown in Figure 8.2.
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Figure 8.2 Select File dialog box.
Eta-Post supports the following result files from DYNA analysis:
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ABSTAT
Airbag statistics
BNDOUT
Boundary nodal forces
DEFGEO
Deformed geometry
DEFORC
Discrete elements
ELOUT
Element data
GCEOUT
Contact element resultants
GLSTAT
Global data
JNTFORC
Joint force file
MATSUM
Material energies
NCFORC
Contact interface forces
NODFOR
Nodal force
NODOUT
Nodal point data
RBDOUT
Rigid body data
RCFORC
Resultant interface forces
RWFORC
Wall forces
SBTOUT
Seatbelt output
SECFORC
Cross section forces
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SLEOUT
Sliding interface energy
SPCFORC
Single point constraint (SPC) reaction forces
SSSTAT
Subsystem statistics
SWFORC
Spotweld rivet forces
TPRINT
Temperature output
8.2.1. AIRBAG STATISTICS (ABSTAT)
The user can plot airbag statistic data from the “abstat” file. The following types are available:
VOLUME
PRESSURE
INTERNAL ENERGY
DM/DT IN
GENSITY
DM/DT OUT
TOTAL MASS
GAS TEMPERATURE
8.2.2. BOUNDARY NODAL FORCES (BNDOUT)
The user can plot boundary nodal force time history data from the “bndout” file. The following types
are available:
XFORCE
YFORCE
ZFORCE
ENERGY
8.2.3. DEFORMED GEOMETRY (DEFGEO)
The user can plot the deformed geometry data from the “defgeo” file.
8.2.4. DISCRETE ELEMENTS (DEFORC)
This user can plot the discrete element time history data from the “deforc” file. The following types are
available:
X-FORCE (MOMENT)
X-FORCE (MOMENT)
X-FORCE (MOMENT)
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RESULTANT FORCE (MOMENT)
8.2.5. ELEMENT DATA (ELOUT)
The user can plot element force data from the “elout” file.
8.2.6. CONTACT ELEMENT RESULTANTS (GCEOUT)
The user can plot contact element resultant data from the “gceout” file. The following types are
available:
XFORCE
YFORCE
ZFORCE
FORCE MAGITUDE
X MOMENT
Y MOMENT
Z MOMENT
MOMENT MAGNITUDE
8.2.7. GLOBAL DATA (GLSTAT)
The user can plot the global time history data from the “glstat” file. The following types are available:
TIME STEP
TOTAL ENERGY
TOTAL/INITIAL ENERGY
ENERGY RATIO
KINETIC ENERGY/ERODED KINETIC ENERGY
INTERNAL ENERGY/ERODED INTERNAL ENERGY
SPRING & DAMPER EMERGY
HOURGLASS ENERGY
SYSTEM DAMPING ENERGY
SLIDING INTERFACE ENERGY
EXTERNAL WORK
TIME PER ZONE CYCLE
NUMBER OF SHELL ELEMENT
STEP SIZE
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GLOBAL X VELOCITY
GLOBAL Y VELOCITY
GLOBAL Z VELOCITY
8.2.8. JOINT FORCE FILE (JNTFORC)
The user can plot the joint force data from the “jntforc” file. The following types are available:
X_FORCE
Y_FORCE
Z_FORCE
X_MOMENT
Y_MOMENT
Z_MOMENT
RESULTANT_FORCE
RESULATANT_MOMENT
8.2.9. MATERIAL EERGIES (MATSUM)
The user can plot the material energy time history data from the “matsum” file. The following types are
available:
INTERNAL ENERGY
KINETIC ENERGY
X MOMENT
Y MOMENT
Z MOMENT
X RIGID BODY VELOCITY
Y RIGID BODY VELOCITY
Z RIGID BODY VELOCITY
8.2.10. CONTACT INTERFACE FORCES (NCFORC)
The user can plot the contact interface force data from the “ncforc” file. The following types are
available:
X FORCE
Y FOECE
Z FORCE
PRESSURE
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X COORDINATE
Y COORDINATE
Z COORDINATE
8.2.11. NODAL FORCE (NODFOR)
The user can plot the nodal force data from the “nodfor” file.
8.2.12. NODAL POINT DATA (NODOUT)
The user can plot the nodal point data from the “nodout” file. The following types are available:
X DISPLACEMENT
Y DISPLACEMENT
Z DISPLACEMENT
X VELOCITY
Y VELOCITY
Z VELOCITY
X ACCELERATION
Y ACCELERATION
Z ACCELERATION
8.2.13. RIGID BODY DATA (RBDOUT)
The user can plot the rigid body time history data from the “rbdout” file. The following types are
available:
X-coordinate
Y-coordinate
Z-coordinate
X-displacement
Y-displacement
Z-displacement
X-ROT-DISPLACEMENT
Y-ROT-DISPLACEMENT
Z-ROT-DISPLACEMENT
X-velocity
Y-velocity
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Z-velocity
X-ROT-VELOCITY
Y-ROT-VELOCITY
Z-ROT-VELOCITY
X-acceleration
Y-acceleration
Z-acceleration
X-ROT-ACCELERATION
Y-ROT-ACCELERATION
Z-ROT-ACCELERATION
8.2.14. RESULT INTERFACE FORCES (RCFORC)
The user can plot the resultant interface data from the “rcforc” file. The following types are available:
X FORCE
Y FORCE
Z FORCE
MASS
8.2.15. WALL FORCES (RWFORC)
The user can plot the rigid wall time history data from the “rwforc” file. The following types are
available:
NORMAL FORCE
X FORCE
Y FORCE
Z FORCE
8.2.16. SEATBELT OUTPUT (SBTOUT)
The user can plot the seatbelt output data from the “sbtout” file. The following types are available:
SEATBELT
SLIPRING
RETRACTOR
8.2.17. CROSS SECTION FORCE (SECFORC)
The user can plot the cross section time history data from the “secforc” file. The following types are
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available:
X FORCE
X MOMENT
Y FORCE
Y MOMENT
Z FORCE
Z MOMENT
X CENTROID
TOTAL FORCE
Y CENTROID
TOTAL MOMENT
Z CENTROID
AREA
8.2.18. SLIDING INTERFACE ENERGY (SLEOUT)
The user can plot the interface energy data from the “sleout” file. The following types are available:
TOTAL SLAVE SIDE
TOTAL MASTER SILE
TOTAL ENERGY
8.2.19. SPC REACTION FORCES (SPCFORC)
The user can plot the SPC reaction force data from the “spcforc” file. The following types are available:
X FORCE
Y FORCE
Z FORCE
X MOMENT
Y MOMENT
Z MOMENT
8.2.20. SUBSYSTEM STATISTICS (SSSTAT)
The user can plot the subsystem statistic data from the “ssstat” file. The following types are available:
KINETIC ENERGY GLOGAL
INTERNAL ENERGY RATIOS 2
KINETIC ENERGY SUBSYSEM 1
INTERNAL ENERGY RATIOS 3
KINETIC ENERGY SUBSYSEM 2
INTERNAL ENERGY RATIOS 4
KINETIC ENERGY SUBSYSEM 3
X MOMENT 1
KINETIC ENERGY SUBSYSEM 4
X MOMENT 2
INTERNAL ENERGY GLOBAL
X MOMENT 3
INTERNAL ENERGY SUBSYSTEM 1
X MOMENT 4
INTERNAL ENERGY SUBSYSTEM 2
Y MOMENT 1
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INTERNAL ENERGY SUBSYSTEM 3
Y MOMENT 2
INTERNAL ENERGY SUBSYSTEM 4
Y MOMENT 3
KINETIC ENERGY RATIOS 1
Y MOMENT 4
KINETIC ENERGY RATIOS 2
Z MOMENT 1
KINETIC ENERGY RATIOS 3
Z MOMENT 2
KINETIC ENERGY RATIOS 4
Z MOMENT 3
INTERNAL ENERGY RATIOS 1
Z MOMENT 4
8.2.21. SPOTWELD RIVET FORCES (SWFORC)
The user can plot the weld spot rivet force data from the “swforc” file. The following types are
available:
AXIAL
SHEAR
8.2.22. TEMPERATURE OUTPUT (TPRINT)
The user can plot the temperature output data from the “tprint” file. The following types are available:
HEAT GENERATION
TOTAL HEAT GENERATION
CHANGE INTERNAL ENERGY
INTERNAL ENERGY
8.3. Graph Control Window
The user can select a file from the Select File dialog box and click Open to load the file to the program.
There are many different types of result files from LS-DYNA analysis that can be read in. The number
of result files depends on the type of analysis and the output control setting in pre-processor. The user
may load as many files in the current database to process. The program displays the Graph control
window as shown in Figure 8.3.
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Figure 8.3 Graph control window
There are three List boxes and three function buttons in the Graph window. The number of list boxes
depends on the result file type. The detailed description of the functions is given in the follow sections.
1.
RESULT FILE
The Result File list box displays the name of result files loaded in the current session. The user
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can select the desired file name in the list box to retrieve the related data.
2.
TYPE
The items list the Type list box depends upon selected the result file. Only the actual data types
in the selected file will be displayed. For example in Figure 8.3, there are two items in the list box
(N/A and Wall-1). N/A indicates the first data type is not available.
3.
COMPONENT
The COMPONENT list box lists the components according to the selected file and the selected
type. The use may select as many components as necessary to be plotted in a graph window. The
user may select a component by clicking the name in the list or select multiple components by
pressing the SHIFT (range) or CTRL (add) key while clicking the mouse button.
The program plots a curve with a unique colour for each selected component.
4.
PLOT
This function plots the selected item(s) in the COMPONENT list box to a curve(s) in current
graph window. Figure 8.4 shows a typical graph window in the display window. The user may
move the graph window to a different location by dragging the title bar in the graph window.
Figure 8.4 Graph window in eta-Post window.
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NEW GRAPH
This function allows the user to create the new graph window to plot the new curve(s). By default,
the new curve is plotted in the current graph window when the user clicks APPLY to plot. This is
the same function as in the CURVE OPERATION window.
6.
EXIT
This button allows the user to exit the Graph module.
8.4. Graph Operation
GRAPH OPERATION TOOLBAR
The
button at the bottom of the graph window is used to open graph operation toolbar as shown
inFigure 8.5.
Figure 8.5 Curve operation toolbar.
There are six functions in the toolbar that can be used to operate the graph window.
This function allows the user to close the graph operation toolbar. Detailed description for each
function is given in the following sections.
8.4.1. PRINT
This function enables the user to print or save the content of the current graph window to a picture file.
Refer to the section 3.5, PRINT, for more information.
8.4.2. CLIPBOARD
This function enables the user to copy the content of the current graph window to the clipboard. Copy
to Clipboard is the standard Windows operation for transferring data between software. The user can
copy a graph image directly to other Microsoft programs as a bitmap image provided that the other
program supports bitmap image. The image in Figure 8.6 is inserted to Microsoft Word document
using the CLIPBOARD function.
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Figure 8.6 An inserted image form clipboard to MS-Word
8.4.3. EXPORT
This function enables the user to export the curves in the current graph window to a DYNAFORM
curve file (with the .CUR extension). The program displays the Select File dialog window and prompts
the user to enter the file name.
8.4.4. ATTRIBUTE
This function enables the user to change the attributes of the curve. Click the Attribute button to display
the control window at the bottom of the graph window. Figure 8.7 shows the functions in the
ATTRIBUTE control window.
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Figure 8.7 Attribute control window
There are many options for the user to change the attribute of the selected curve. The box on the left of
the window shows the curve names in the graph window. The user should select a desired curve by
clicking the curve name to change its attribute.
1.
ON/OFF
This function enables the user to turn on/off the selected curve(s) in the graph window. The user
may select a curve by clicking the name in the list or select multiple curves by pressing the SHIFT
(range) or CTRL (add) key while clicking the mouse button.
2.
PROPERTIES
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This function will display a window to present the basic properties (number of points in curve,
Min. Y and Max. Y coordinates) of the selected curve. A typical PROPERTIES window is shown
in Figure 8.8.
Figure 8.8 Properties window
3.
CURVE NAME
This function allows the user to change the name of the curve.
4.
CURVE STYLE
This function offers an option for the user to change the line style of the selected curve. There are
four styles available for the curve.
SOLID
DASH
DOT
DASH DOT
The default style is SOLID and the user can press the
button on the right of the text box to
select a desired type. Click the APPLY button to update the graph window.
5.
NUMBER OF CURVE MARKS
This function offers an option to the user to change the number of curve marks on the selected
curve. The user can click
button on the right of the text box to select a desired number (2~15)
of curve marks.
6.
MARK
This function offers an option to the user to change the type of curve mark. There are six types of
curve mark available.
ROUND
SQUARE
UP TRIANGULAR
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DOWN TRIANGULAR
DIAMOND
NO MARK
The user can press the
button on the right of the text box to select a desired type. Click the
APPLY button to update the graph window.
7.
CURVE COLOUR
This function allows the user to change the colour of the selected curve. The user clicks the colour
box to display the colour panel. Figure 8.9 shows the colour panel. The user may select the desired
colour for the curve. If the user does not want to change the colour after the colour panel is
displayed, click anywhere outside the colour panel to cancel the operation. Click the APPLY
button to update the graph window.
Figure 8.9 Colour panel
8.
BACKGROUND COLOUR
This function offers an option for the user to change the background colour of the graph window.
The default background colour of the curve window is black. The procedure of changing the
background is same as described in CURVE COLOUR function.
9.
AXIS OPERATION
The functions in AXIS enable the user to modify the attribute of the axis including Log X, Log Y,
Grid display, and change the height of Y axis.
10. LOG X and LOG Y (toggle)
This function enables the user to change the value of coordination with logarithm scale.
11. GRID
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This function enables the user to display X and Y grids in the curve. Refer to the Figure 8.7 for a
typical graph window with GRID option.
12. MODIFY Y AXIS
This function enables the user to specify the height of the Y-axis in the graph window. Click
anywhere along the Y-axis to define the new height. The user can click the Modify button again to
cancel the operation.
13. X TITLE
This function offers an option for the user to change the title of X-axis. The X title is labelled
below the X-axis.
14. Y TITLE
This function offers an option for the user to change the title of Y-axis. The y title is labelled on
the left side of the Y-axis.
15. MIN. MAX. X/Y
This function offers an option for the user to change the range of the X and Y coordinates. The
program plots only the portion of the curve(s) within the defined coordinate range.
16. NEW VALUE
This function allows the user to modify the Y value of a selected point. Click a point on a curve to
display the x and y coordinate in the corresponding text boxes. The X text box is inactive and
can’t be modified. The user can modify the value of the Y text box.
8.4.5. OPERATION
The functions in OPERATION control window allow the user to operate on the selected curve. There
are 23 types of operations on the curve. These operations are grouped into two categories: curve data
operations (such as Integration, Differentiate, Add, etc.) and curve object operations (such as Copy,
Delete and Paste, etc.). One or more curves must be selected before selecting the curve operation
function. Click the OPERATION button to display the control window as shown in Figure 8.10.
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Figure 8.10 Curve Operation window
The curve list box on the left of the Operation window lists the curve names in the current graph
window. A unique curve number is assigned to each curve name. The curve number usually starts with
a letter and follow with a two-digit number. The user may select a curve by clicking the name in the
list or select multiple curves by pressing the SHIFT (range) or CTRL (add) key while clicking the
mouse button.
1.
CURVE OBJECT OPERATION
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COPY
This function allows the user to copy the selected curve(s).
z
PASTE
This function allows the user to paste the copied curve(s) to the current graph window or
another graph window.
NOTE: The Copy and Paste functions are not meant for other software such as MS-Word. Use the
Clipboard function to paste the graph window to other software.
z
DELETE
This function allows the user to delete the selected curve(s) from the current graph window.
2.
CURVE OPTIONS
The Curve Options includes 9 types of operation for the selected curve. The option operation is
applied to the last selected curve(s). For example, if the user selects a curve from the curve name
list window and clicks “1/X” button, the program will perform the reciprocal operation to the Y
values of the selected curve.
z
NEGATIVE
This function allows the user to change the Y value of selected curves by multiplying -1.
z
SCALE
This function allows the user to scale the Y value of the selected curve by multiplying a
defined scale factor.
z
INTEGRATIE
This function allows the user to perform an integral of the selected curve. The new the Y
value is equal to the area under the selected curve from the origin to the current X value.
z
DIFFERENTIAL
This function allows the user to perform the derivation of the selected curve. The new Y-axis
value is equal to the slope of the curve’s tangent on corresponding X point.
z
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SQUARE
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This function allows the user to apply the square to the Y values of the selected curve.
z
SQUARE ROOT
The function allows the user to take the square root of the Y values of the selected curve. If
the Y value is negative, the program will find the square root of the absolute value and
maintain the negative sign from the original Y value.
z
RECIPROCAL
This function allows the user to convert the Y values of the selected curve to their reciprocal.
z
ABSOLUTE
This function allows the user to plot the absolute value of the Y values of the selected curve.
z
RESULTANT
This function allows the user to find the square root of the sum of the square of the Y values
of the selected curves. The new value
. The function is used to plot
the vector length from three curves containing the X, Y and Z component. For a twodimensional vector, only two curves need to be selected. This function will be activated after
the user selects more than one curve.
z
LOGARITHM
This function allows the user to plot the logarithm of the Y values of the selected curve. The
original Y value should be greater than zero.
z
NATURAL LOGARITHM
This function allows the user to plot the natural (Napierian) logarithm of the Y values of the
selected curve.
z
FAST FOURIER TRANSFORM
This function allows the user to convert curve data from time domain to frequency domain
response for signal processing analysis. The FFT is a fast algorithm for computing the
Discrete Fourier Transform (DFT). The DFT is a basic operation to transform an ordered
sequence of data samples from a signal, usually in a time-domain into the frequency-domain.
The spectral information about the signal is then represented explicitly. There are various
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implementation of FFT when the samples are not of power of two. The algorithms adopted in
eta/Post can deal with both cases, whether the number of samples is a power of two or not.
z
HIC 15
This function enables the user to calculate the maximum Head Injure Criteria when the
impact time is less than 15 milliseconds. This is a special function used for eta/VPG
z
HIC 36
This function enables the user to calculate the maximum Head Injure Criteria when the
impact time is less than 36 milliseconds. This is a special function used for eta/VPG
3.
FILTERS
There are four different filters implemented in OPERATION.
Average Filter
Butterworth Filter
Finite Impulse Response (FIR)
SAE
z
AVERAGE
AVERAGE allows the user to smooth the curve through averaging the value of a point with a
number of neighboring points defined by user. The purpose of this operation is to make the
curve smoother.
Select the AVERAGE type from the drop down list by clicking the down arrow button in the
FILTER text window.
Clicking the SELECT button to display the DATA CONTROL window. The program will
prompt the user to enter the number of the points for averaging as shown in Figure 8.11. The
user may enter any positive number in the input box, which displays the default value of 10.
Figure 8.11 DATA CONTROL window of AVERAGE filter
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After the user enters an appropriate number, click OK to accept the input value and exit the
DATA CONTROL window.
Press APPLY to display the filter result.
z
FIR FILTER
This function allows the user to smooth the curve according to the Finite Impulse Response
(FIR) filter specifications.
Select the FIR type from the drop down list by clicking the down arrow button in the FILTER
text window.
Click the Select button to display the DATA CONTROL window. The program will prompt
the user to enter the corresponding parameters in the control window. The user may enter any
appropriate parameters in the DATA CONTROL windows, which displays the default values
as shown in Figure 8.12.
Figure 8.12 DATA CONTROL of FIR filter
y
PASSBAND FREQUENCY
The maximum Passband frequency is determined through the equation: Passbanduser =
(Total Number of Points on Graph/Time Duration). The default value is 10% of the
Passband frequency.
y
STOPBAND FREQUENCY
Stopband frequency is defined as:
Stopband = Passbanduser + (Passbanmax -
Passbanduser). The default value depends on the Passbanduser.
y
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Passband Ripple value is between 0.0 and 1.0 dB.
y
MINIMUM STOPBAND ATTENUATION (MIN.ATT.1.0+ DB)
Stopband attenuation must be greater than 1.0 dB. The Stopband frequency and
maximum Passband Ripple should not be too close to either the given low- or high-end
limits. Attenuation factors commonly range between 10 and 50. It is recommended that
the user choose a Passhand frequency that is approximately 5 to 20% of the number.
Too small a number will cause a computational error and too large a number will cause
the program to stall.
After the user enters the appropriate parameters, click OK to accept the input
parameters and exit the DATA CONTROL window.
Presses APPLY to display the filter result.
z
SAE FILTER
This function allows the user to smooth curves according to the Society of Automotive (SAE)
filter specification.
Select the SAE type from the drop down list by clicking the down arrow button ing the
FILTER text window.
Clicking the SELECT button to display the DATA CONTROL window. The program will
prompt the user to enter the Cutoff value as shown in Figure 8.13. The user may enter any
appropriate value in the DATA CONTROL window, which displays the default values of 10.
Figure 8.13 DATA CONTROL window of SAE filter
After the user enters the appropriate value, click OK to accept the input parameters and exit
the DATA CONTROL window.
Presses APPLY to display the filter result.
z
146
BUTTERWORTH FILTER
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CHAPTER 8
This function allows the user to smooth the curves according to the Butterworth filter
specifications.
Select the BUTTERWORTH from the drop down list by clicking the down arrow button in
the FILTER text window.
Click the Select button to display the DATA CONTROL window. The program will prompt
the user to enter the corresponding parameters in the control window. The user may enter any
appropriate parameters in the DATA CONTROL window, which displays the default values
as shown in Figure 8.14.
Figure 8.14 DATA CONTROL window of Butterworth filter
y
PASSBAND FREQUENCY
The maximum passband frequency is determined through the equation: Passbanduser
=(Total Number of Points on Graph/Time Duration). The default value is 10% of the
passband frequency.
y
STOPBAND FREQUENCY
Stopband frequency is formulated ; Stopband = Passbanduser + (Passbanmax Passbanduser). The default value depends on the Passbanduser.
y
MAXIMUM PASSBAND RIPPLE (MAX PASSBRIPP)
Passband Ripple value is between 0.0 and 1.0 dB.
y
MINIMUM STOPBAND ATTENUATION (MIN.ATT.1.0+ DB)
Stopband attenuation must be greater than 1.0 dB. The Stopband frequency and
maximum Passband Ripple should not be too close to either the given low- or high-end
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limits. Attenuation factors commonly range between 10 and 50. It is recommended that
the user choose a Passhand frequency that is approximately 5 to 20% of the number.
Too small a number will cause a computational error and too large a number will cause
the program to stall.
After entering the appropriate parameters, click OK to accept the parameters and exit
the DATA CONTROL window.
Presses APPLY to display the filter result.
4.
COMPUTATION
This function allows the user to create a new curve through the algebraic operation of several
selected curves including Add, Subtract, Multiply, Divide, etc. The operation in this group usually
requires to select a curve prior and after the operation.
z
ADD
This function adds the Y values from two or more curves.
z
SUBTRACT
This function subtracts the Y values of the second curve from the first curve.
z
MULTIPLY
This function multiplies the Y values of the selected curves.
z
DIVIDE
This function divides the Y values of the first curve by the second curve.
z
BRACKET
This functions enables the user to define the left and right brackets to group a series of
operations.
z
CROSS PLOT
This function enables the user to make a cross plot of two selected curves. The new X-axis
value is obtained from the Y-axis value of the second selected curve and the new Y-axis
value from the Y-axis value of the first curve. For example, it the user wants to plot a load
defection curve, he should click the load curve as the first curve and the deflect curve as the
148
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CHAPTER 8
second curve. The program will plot the load as the Y coordinate and deflection as X
coordinate in the new curve. It is recommended to plot the cross plot curve to a new graph
window to obtain a proper scaling.
5.
RESULTING CURVE
The RESULTING CURVE window displays the curve operation expression in real time during
the definition process. When user clicks the curve name in the curve name window, the program
displays the curve number in the Resulting Curve window. When the clicks a operation button, the
program will add the operation symbol in a appropriate location related to the curve number. For
example, if the user clicks the first curve name from the curve name window and then clicks “+”
(Add) from the computation group and then the second curve name, the program will display C1 +
C2 in the Resulting Curve window. If the user than clicks the “Square Root” from the Curve
Option group, the program will display C1+C2:Rt(). This means the program is adding the first
curve to the square root of the second curve.
There are two types of colour of the expression in the Resulting Curve window. One is black and
another is red. When the colour of the expression is black, it means that the defined operation is
valid and the user can press APPLY to perform the operation. If the colour of the expression is red,
it indicates that the expression is not correct.
The user may use the UNDO button to erase the last operation. The user may also click the text in
the Resulting Curve window and use the keyboard entry to edit the text expression. However the
latter method is not very convenient, and is not recommended for the new user.
6.
APPLY
This function executes the defined operations as shown in the Resulting Curve window.
7.
UNDO
This function allows the user to cancel the last selected operation. The user may click as many
UNDO as necessary to correct the defined operation.
8.
CLEAR
This function allows the user to erase all the selected operations any time while defining the
operation.
NOTE: During the operation for curves, some curve data operations require the sample frequency
and intervals are the same, e.g. binary arithmetic operation. Some other operations require a
minimum number of samples e.g. Differentiation, Integration etc. If the user used these
operations without following these requirements, an error message box will be resulted.
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NOTE: There are four digital filters as discussed earlier in this chapter. All the filters have the
default parameters for convenience. There are two classes of digital filter, non-recursive and
recursive. Butterworth filter is the lowpass recursive filter and the FIR and average filter are
non-recursive filters. The computation is less for FIR filters than that for Butterworth.
However, Butterworth filter gives more power and less signal loss.
9.
NEW GRAPH
This function allows the user to create the new graph window to plot the new curve(s). By default,
the new curve is plotted in the current graph window when the user clicks APPLY to plot.
8.4.6. SAVE
This function allows the user to save all the curves in current graph window.
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APPENDIX A
INDEX FILE FORMAT
APPENDIX A
INDEX FILE FORMAT
2006.1 Version 02
INTRODUCTION
Like the format of LS-DYNA input deck, the file uses keyword input, which provides a flexible and
logically organized database that is simple to understand.
The following are some new cards. The others are the same as that in ls-dyna, such as *MAT,
*SECTION, *DEFINE_CURVE, etc.
HEADER
Generally, index file contains the following two comments:
$ eta/DYNAFORM index file (date at time)
$ KEYWORD VERSION (version number)
for example,
$ eta/DYNAFORM Index File
Jan 9, 2006 at 12:00:44
$ KEYWORD VERSION 02
*DATABASE_FILE
Purpose: Specify the database file name.
Card Format
Card 1
Variable
FILENAME
Type
C
Default
none
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INDEX FILE FORMAT
APPENDIX A
VARIABLE DESCRIPTION
FILENAME
File name of database file, 80 characters maximum .
*DATABASE_STATISTICS
Purpose: Statistics of the database.
Card Format
Card 1
1
2
3
4
5
6
Variable
NPRT
NND
NEL
NLN
NSRF
Type
I
I
I
I
I
Default
0
0
0
0
0
VARIABLE
7
8
DESCRIPTION
NPRT Number of parts.
NND
Number of nodes.
NEL Number of elements.
NLN Number of lines.
NSRF Number of surfaces.
*DATABASE_UNIT
Purpose: Specify the unit system.
Card Format
Card 1
1
Variable
NUNT
DESCRIPTION
Type
I
C
Default
0
none
VARIABLE
2
3-8
DESCRIPTION
NUNT Unit system:
EQ 0: MM, TON, SEC, N
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INDEX FILE FORMAT
EQ 1: MM, G, MSEC, N
EQ 2: MM, KG, MSEC, KN
EQ 3: M, KG, SEC, N
DESCRIPTION Description of the unit system
*PART_DF
Purpose: Supplement some attributes of part, i.e., combine material information, section properties,
FLC. Input is terminated when a “*” card is found.
Card Format
Card 1
1–4
5-8
Variable
PARTNAME
TOOLNAME
Type
C
C
Default
None
none
Card 2
1
2
3
4
5
6
7
Variable
PID
SECID
MID
FLDID
Type
I
I
I
I
Default
none
none
none
0
VARIABLE
8
DESCRIPTION
PARTNAME Name of part
TOOLNAME Name of tool of part
PID
Part identification, must be identical with that in dyna input file
SECID
MID
FLDID
Section identification defined in the *SECTION section
Material identification defined in the *MAT section
ID number of FLD, see *DEFINE_FLD.
*DEFINE_FLD
Purpose: Define a FLD (forming limit diagram).
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INDEX FILE FORMAT
APPENDIX A
Card Format
Card 1
1
2
Variable
FLDID
LCID
FLD0(E-S)
Type
I
I
Default
none
0
VARIABLE
3
4
5
6
7
FLD0(T-S)
N
T
R
F
F
F
F
F
none
none
none
none
none
8
DESCRIPTION
FLDID FLD identification, must be unique
LCID Load curve ID which defines the forming limit curve (FLC).
Minor strains are defined as abcissa values and major strains are defined
as ordinate values. In defining the curve list pairs of minor and major
strains starting with the left most point and ending with the right most
point, see *DEFINE_CURVE.
FLD0(E-S) Minor engineering strain.
FLD0(T-S) Minor true strain
N
Work-hardening exponent
T
Thickness
R
Plastic anisotropy ratio
*DRAWBEAD_DF
Purpose: Supplement some attributes of drawbead. Input is terminated when a “*” card is found.
Card 1
1
2
3
4
5
6
7
8
Variable
CID
PID
LCIDRF
LCIDNF
DFSCL
Type
I
I
I
I
F
Default
none
none
none
none
1.0
VARIABLE
CID
154
DESCRIPTION
Contact ID of drawbead, must be identical with that in dyna input file
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APPENDIX A
PID
INDEX FILE FORMAT
ID number of the part attached by the drawbead, see *PART_DF
LCIDRF Load curve ID giving the restraining force
LCIDNF Load curve ID giving the normal force
DFSCL Scale factor for the restraining force curve (LCIDRF)
*DEFINE_POPLINE
Purpose: Define a pop-line.
Card Format
Card 1
1
2
3
4
5
6
Variable
PLID
LID
PID
Type
I
I
I
Default
none
none
none
VARIABLE
7
8
DESCRIPTION
PLID Pop-line identification, must be unique
LID
ID number for 3D line, see *DEFINE_LINE3D
PID
Part ID attached by pop-line, see *PART_DF.
*DEFINE_LINE3D
Purpose: Define a general 3D line.
Card Format
Card 1
1
2
3
4
Variable
LID
PID
Type
I
I
Default
none
none
5
6
7
Card 2, 3, 4, etc. Put coordinate per card (3E20.0).
8
Input is terminated when a “*” card is
found
Variable
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X
Y
Z
155
INDEX FILE FORMAT
APPENDIX A
Type
F
F
F
Default
none
none
none
VARIABLE
DESCRIPTION
LID
ID number for 3D line, must be unique
PID
Part ID, see *PART_DF.
X, Y, Z Coordinates of points on 3D line
*END
Purpose: Define the termination of the Index file, must be located in the end of the idx file.
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APPENDIX B
HARDWARE AND SOFTWARE REQUIREMENTS
APPENDIX B
HARDWARE AND
SOFTWARE REQUIREMENTS
z
UNIX
PLATFORM
OS VERSION
GRAPHICS CARD
DISK SPACE
HP
HP-UX 11+
Minimum CRX 8 Plane
200 MB
IBM
AIX 4.2+
Minimum 24 Plane Graphics
200 MB
SGI
IRIX 6.5+
All Graphics Boards Supported
200 MB
SUN
SunOS 5.8+
Minimum Creator 3D
200 MB
z
LINUX
The RedHat operating system version 7.3 and above is supported. Eta-Post must run under KDE
environment. NVIDIA graphic cards are recommended.
z
PC/WINDOWS
Eta/Post-Precessor is compatible with LS-DYNA/PC 960 and 970. It will run on Windows 98,
2000, and XP environments. It is not recommended for use with earlier versions of Windows. The
following are minimum requirements for proper operation of eta/Post-PC in a Windows
environment:
z
Minimum Graphics Requirement:
XGA(1024 x 768)
z
Graphics Card:
OpenGL based (NVIDIA chip set recommended) or DIRECT 3D (sufficient) with 8 megabytes
video RAM.
z
Minimum Memory Requirement:
Small model (10,000 - 20,000 elements):
256 MB
Medium model (20,000 - 100,000 elements):
512 MB
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HARDWARE AND SOFTWARE REQUIREMENTS
z
APPENDIX B
Large model (100,00 - 300,000 elements):
768 MB
Huge model (300,000 - 1,000,000 elements):
1GB +
Minimum Load space requirement:
256 megabytes
z
Recommended processor:
Pentium 4 or better
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FINAL NOTES
FINAL NOTES
ETA would like to thank all those who helped creating this manual. We have tried to make this manual
as accurate as possible. In an effort to keep future versions as error free as possible, we ask that you
send us your suggestions and notify us of any errors that you come across. You can contact the ETA
software support group at the Troy office via:
Voice: 248-729-3010
Fax:
248-729-3020
E-mail: [email protected]
Emend Time: June 05, 2006
eta-POST Team
Engineering Technology Associates, Inc.
eta/Post 1.2
159
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