ls-prepost intro 073012
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Introduction to LS-PrePost 3.2Jacob Krebs, Philip Ho, LSTC July 30, 2012
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Table of Contents
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SECTION WORKSHOPS
Overview -
General Operations Workshop 01
Mesh Generation Workshop 02
Pre-Processing Workshop 03-06
Post-Processing Workshop 07-08Command File and Macros Workshop 09
Advanced Applications Workshop 10
Extra Pre-Processing Exercises Workshop 11
Geometry Workshop 12
Configuration Files -
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Overview
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About LS-PrePost
LS-PrePost is an advanced pre and post-processordesigned specifically for LS-DYNA
LS-PrePost is developed for Windows and Linux
LS-PrePost is Free
Core Functionality
Full support of LS-DYNA keyword files
Full support of LS-DYNA results files
Robust handling of geometry data (new CAD engine in 3.x)
Pre-processing (meshing, model clean-up, entity creation)
Post-processing (animation, fringe plotting, curve plotting)
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Online Resources
Official Website
http://www.lstc.com/lspp
User Group
http://groups.google.com/group/ls-prepost
Latest Release Version:
http://ftp.lstc.com/anonymous/outgoing/lsprepost/3.2/
ftp://ftp.lstc.com/outgoing/lsprepost/3.2/
Beta Version:
http://ftp.lstc.com/anonymous/outgoing/lsprepost/4.0
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Input / Output
Input (partial list)
FEM: LS-DYNA Keyword, Nastran, I-DEAS Universal,PAM-CRASH, RADIOSS
CAD: IGES, STEP ASCII: glstat, matsum, etc
Binary: d3plot, binout, etc
Output (partial list) FEM: LS-DYNA Keyword, Nastran, STL
Image: BMP, GIF, JPEG, PNG, PostScript
Movie: AVI, MPEG, Animated GIF XY Data: CRV, CSV, XML
Other: Post.db, Project File
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Mouse and Keyboard
Dynamic Model Operation
Rotate: Shift + Left-click
Translate: Shift + Middle-click
Zoom: Shift + Right-click/Scroll-wheel
(Using Ctrl instead of Shift for edge mode)
Graphics Selection
Pick (single): Left Click
Area (rectangle): Left-click + Drag
Poly (polygon): Left-click at corners / Right-click to finish
List Selection
Multi-Select: Left-click + Drag / Ctrl + Left-click
Mouse over controls for status bar help comments
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GUI Layout
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Menus
File management & preferences
Command Line
Input (left) / Output (right)
Bottom Toolbar
Model rendering controls
Right Toolbar
Access to pre and post-processing tools
Graphics Viewport
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Transition Tips (version 2.4 to 3.X)
Function Key: F11
Toggles between v2.4 and v3.X style user interface
Menu: View > Toolbar > Text & Icon
Turns on icon labels for bottom and right toolbars
Menu: Help > Old to New
Provides mapping between v2.4 page interface buttons and
v3.X toolbar icons
Menu: Help > Document
Describes new geometry tools
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File Menu Open Open file (new model created for each file opened) Import Import file (adds keyword data to current model)
Recent Open recent files (stored in /user/.lspp_recent)
Save Over-write current Keywordor Projectfile
Save As Save any of the following file formats using advanced
options: Keyword, Active Keyword(visible data), Project, Post.db
(condensed d3plot data), Geometry, Keyword and Project(using same
file name)
Update Load new d3plots for run in progress
Run LS-DYNA Submit LS-DYNA job on the local machine
Print... Launch printing interface (send to printer or image file)
Movie... Launch movie generation interface
Exit Exit LS-PrePost
Save and Exit Save data to current file and exit LS-PrePost
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File Open LS-DYNA Binary Plot d3plot, interface file, or d3thdt LS-DYNA Keyword File ASCII formatted input file
Time History File d3thdt (after loading d3plot)
Command File Command session file
Post.db File Database file (created by cdb=input)
Project File Project file (pre-processing)
Interface Force File Interface force file (post-processing)
IGES File Geometry data in IGES format
STEP File Geometry data in STEP format
Nastran File Nastran bulk data file Nastran+pch File Nastran stress result file
Lsplot File Obsolete
Others Additional input file types
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Misc. Menu View Model Info Launch model information interface View Memory Info Launch memory usage interface
View Message Info Launch keyword reader message interface
Display Ruler Launch ruler interface
Set Keyword Title Launch title interface
Swap Byte On Title Swap byte order for title
Start Recording Commands Start/stop recording macro commands
Launch Macro Interface Launch Macro interface
Manage Command File Launch command file interface
Execute System Call Launch system call interface Keyword File Separate Separate a single keyword file into multiple
files based on *KEYWORD title
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View Menu Full Screen (Esc to Exit) Show graphics area in full screen mode
Background Set background style (plain, faded, or image)
Geometry Shade Set geometry rendering style
Element Shade Set element rendering style
All Element/Geometry Show all elements/geometry
Ref Geometry Show reference geometry Points/Curves/Surfaces Show points/curves/surfaces
Toolbar Hide/display toolbars, set text/icon mode, and set font size
Local Axes Toggle between global/local
Beam Prism Toggle between line/prism
Smooth Fringe Color Enable smooth contours (when in fringe mode)
Keep Zout Orientation Maintain orientation when zooming out
Show Deleted Nodes Display deleted nodes when viewing results
Show Deleted Elements Display deleted elements when viewing
results
Result On Screen Display results on screen when Ident > Show
Results is active (when in fringe mode)
Smooth Shade Use smooth shading
Record Message Write messages to lspost.msg
Show Mid-Side Nodes for 10-node Tetrahedron element
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Geometry Menu Reference Geometry Access tools for creating and editing
reference geometry (Axis, Plane, Coordinate System, and
Point)
Curve Access tools for creating and editing curves (Point,
Line, Circle, Circular Arc, Ellipse, Elliptical Arc, BSpline Curve,
Helix, Composite Curve, Break Curve, Merge Curve, BridgeEdge, Smooth Curve, Middle Curve, Morphing Curve, Fillet
Curve)
Surface Access tools for creating and editing surfaces (Plane,
Cylinder, Cone, Sphere, Torus, Fill Plane, Extrude, Revolve,
Sweep, Loft, N-Side Surface, Patch Surface, Bridge Two Faces,
Combine Faces, Fit From Points/Mesh, Middle Surface, SurfaceMorphing)
Solid Access tools for creating and editing solids (Box,
Cylinder, Cone, Sphere, Torus, Extrude, Revolve, Sweep, Loft,
Fillet, Chamfer, Draft, Thicken, Wedge, Boolean)
Geometry Tools Access other geometry tools (Delete Face,Extend Curve, Extend Face, Intersection, Offset, Project,
Replace Face, Stitch Faces, Trim Transform, Copy Entity,
Management, Heal, Topology Simplify, Measure)
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FEM Menu Element and Mesh Access mesh creation tools (Shape
Mesher, Auto Mesher, Solid Mesher, Block Mesher, N-Line
Mesher, Tetrahedral Mesher, Blank Mesher, Element
Generation, Node Editing, Element, Editing, Mass Trimming,
Spot Welding, SPH Generation)
Model and Part Access model and part tools (Assembly andSelect Part, Keyword Manager, Create Entity, Display Entity,
Reference Check, Renumber, Section Plane, Model Selection,
Subsystem Manager, Group, View, Part Color, Appearance,
Annotation, Split Window, Explode, Lighting Setup)
Element Tools Access element tools (Identify, Find, Blank,
Move or Copy, Offset, Transform, Normals, Detach, Measure,Morph, Smooth, Part Trim, Part Travel)
Post Access post-processing tools (Fringe Component, Fringe
Range, History, XY Plot, ASCII, Binary Output, Follow, Trace,
State, Particle, Circle Grid, Chain Model, FLD, Output, Setting,
Vector) Favorites Customizable toolbar (see Setting Toolbar
Manager)
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Application Menu
Airbag Folding Dummy Positioning
Seatbelt Fitting
Metal Forming
Roller Hemming
ALE Setup
Model Checking
Intrusion Measurements
Head Impact Positioning
Granular Flow Setup
Airbag Impact Setup
Media
Sled Creation
DynFold
Curve Gen Customize
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Setting Menu Current Subsystem ID Set current subsystem ID
Current Working Directory Set current working directory
General Settings Set general parameters
Post Settings Set post processing parameters
Configuration Settings Set configuration settings
Toolbar Manager Customize toolbars
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Help Menu Document View LS-PrePost documentation Tutorial View LS-PrePost tutorials
Will need to download the Help and Tutorial documents from
LSTCs ftp site the first time these documents are being
accessed
Old to New View mapping between old (v2.4) and new (v3.X) GUI Release Notes View release notes
Check for Update Check server for newer version of LS-PrePost
About LS-PrePost View version info
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Bottom Toolbar
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Opti Toggle Title, Legend, Min-Max, Time Stamp, Triad,Background Color, Mesh Color, and Performance Stats on/off
HidEle Display elements with hidden lines removed
ShaEle Display elements in shaded mode with mesh lines off
VieEle Display elements in plain color mode
WirEle Display elements in wireframe mode
Feat Display elements in feature line mode (default angle=30)Edge Display elements in edge line mode
Grid Display each nodal point as a colored pixel
Mesh Toggle element mesh on/off
Shrink Draw elements in shrunken mode (default=0.85)
Frin Toggle Fringe/Line-contours/Iso-surfaces
Unref Toggle unreferenced nodes on/off
EdgGeo Display geometry in shaded mode with edges on
ShaGeo Display geometry in shaded mode with edges off
WirGeo Display geometry in wireframe mode
ShfCtr Toggle Off/Shift/Ctrl (for one-handed rotate/pan/zoom)
Clear Clear all picked or highlighted information
AutCen Automatically center model to fit within window
ZoIn Zoom in, click and drag to draw a box
Zout Zoom out to previous zoom position
Pcen Pick node as new center point for model rotation
VCrd View coordinate systems
Top Choose Top, Bottom, Front, Back, Right, or Left view
Angle Left-click to reverse rotation direction
Right-click to modify rotation angle
Rotate Left-click to rotate about axis shown
Right-click to switch rotation axis (X/Y/Z)
Persp Toggle Parallel/Perspective view mode
ActAll Restore all entities to be active
BacCol Toggle background color black/white (Plain background mode only)
Anim Display animation controls or start/stop animation
SelPart Launch Assembly and Select Part interface
ResPart Restore the last removed part (Shift+R)
Plot Open XY plot management interface
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General Operations
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FEM General Selection
ID Enter Ids of the entity to be selected into
the text box for highlighting
Type When selecting element, chooseelement type to be selected
Label selection put a label on the selected
entities
Prop Propagate selection (pick seed)Adap Propagate across adaptive elements
Ang Feature angle for propagation to stop
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Pick Select a single entityArea Select using a rectangular window
Poly Select using an irregular polygon
Sel1 Pick 1 entity (only 1 will be in buffer)
Sphe Select entities within a sphereBox Select entities within a box
Prox Select entities within proximity to a part
Circ Select entities within a circle
Frin Select entities within a fringe plot rangePlan Select entities within a plane
In Select entities inside Area/Poly
Out Select entities outside Area/PolyAdd Add entities to a selection set
Rm Remove entities to a selection set
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FEM General Selection
ByNode Select nodes
ByElem Select elements
ByPart Select parts
BySet Set based selection
ByEdge Edge based selection
ByPath Select first and last along a pathBySegm Select segments
BySurf Select surface (geometry)
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Adjacent Select adjacent elementsAttach Select attached elements
Clear Clear selection
Save Save selection to buffer or to file
Load Load selection from buffer or
from file
Deselect Undo last selection
Whole Select all entities in modelVisible Select all visible entities
Reverse Reverse selection
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Model Assembly and Select Part
Purpose: turn parts on/off (on=active) Parts listed by PID and name (or element
type)
Top drop-down menu selects current model Parts can be turned on/off by element type
Use General selection to select parts
Active parts can be Saved/Loaded frombuffers (via Save button in General selection)
Selected displays active parts only in list
Info button launches Part Information
interface for active parts
SortBy button launches Part Sort interface
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Model->Select Part->SortBy
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Options to select info
to be tabulated
Each header can beclicked to sort the IDs
of that column
Highlighted parts canbe set as active part in
the graphics rendering
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Model MSelect Select
Purpose: switch between loaded models, view multiplemodels, perform keyword comparison
Select display selected model(s)
Trans translate a model (for visualization only,useful for side-by-side animation)
Remove unload a model
Info show model summary
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Model Groups
Purpose: create part groups Groups are automatically generated for all
*SET_PART that exist in the model
Create create a new group from active parts Select load the selected group
Add add a group to the current display
Subtract subtract a group from the current display
Save save groups to an ASCII file
Load load groups from file
(Save and Load effective for presentations)
Or, And, Xor used for Adding groups
Auto Center automatically center the selected
group
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Model Views
Purpose: create views (based on color, appearance,orientation, and active parts)
Create create a new view
Select load the selected view Delete delete the selected view
Save save views to a binary file
Load load views from file
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Model Appearance
Purpose: modify the appearance of parts Parts can be selected by Single/Area/Polygon
Each selected part will have the selected rendering
options applied Thick draw shells with true thickness
Sphere draw solid part nodes as spheres (for EFG)
AllVis selected rendering options are applied to all
active parts
Render buttons are disabled while using Appear
interface
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Model Part Color
Purpose: modify part color and transparency Set/Show colors for parts or other entities
(background, text, mesh, labels)
Sky (top), Middle, Ground (bottom) refer to
background color (when View > Background > Tri
Fade is selected)
Select color from palette or form new color using
RBG Editmap to assign new color to the color map
Fringe colors can also be changed select a fringe
color, then after the color selection, click Fringe
button.
Amap apply the current color map to part drawing
Rstp restore transparency of all parts to opaque
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Model Part Color
Smap save the current color map to a file Lmap load color map from a previous saved file
Transparency draw part in transparent mode,
transparency factor:
0.0 fully opaque (once is set to 0.0, need to click
part again to turn it into transparent)
1.0 totally transparent
Pick toggle pick a part to toggle it from opague
to transparent and vice versa
Pick through pick through a part to set part thatis behind this part
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Model Annotation
Purpose: annotate Graphics and XY-Plot windows Position interactively position text
Arrow add fixed arrow
Nd Arrow add arrow tied to node location Move move annotations
Text size, color, and orientation can be adjusted
Annotations can be saved to / loaded from a file
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Model Explode
Purpose: separate (explode) parts for bettervisualization
Factor scale factor for parts movement
Direction direction for part movement All explode all parts
Part explode selected parts only
PtGroup explode a group of parts (defined using
Page 1: Group)
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Model Lighting Setup
Purpose: adjust model and material lighting Light adjust model lights
2 lights are on by default
Front position (0.0, 0.0, 1.0)
Back position (0.0, 0.0, -1.0)
Up to 8 more can be activated
The following properties can be adjusted for each
Ambient Diffuse
Specular
Position
Material adjust material lighting
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Element Tools Identify
Purpose: identify nodes/elements/parts Uses General Selection interface
Entity types:
Node, Element, Part, Curve, Surface, Particle,
constrained nodal rigid body (cnrb)
Element types:
Shell, Solid, Beam, TShell, SPH, Mass, Discrete, Seatbelt,Inertia, Nurbs, DiscSph, Any
Max. number of IDs that can be shown is 12800
Can key in xyz coordinates to show position
Can show element directions (shell and beam)
Can show orthotropic material directions
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Element Tools Identify
Purpose: identify nodes/elements/parts Can show node/element results (after fringing in
post-processing)
Can show element results at integration points
To show result on screen, go to pull down menu
View, and turn on Results on Screen
When identifying a very large no. of nodes or
elements, make sure to turn off Echo and turnon No ID, otherwise will take a long time to
come back
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Element Tools Blank
Purpose: temporarily hide or mask elements Uses General Selection interface
Entity types:
Node, Element, CNRB, Curve, Surface, Particle Element types:
Shell, Solid, Beam, TShell, SPH, Mass, Discrete, Seatbelt,Inertia, Nurbs, DiscSph, Any element
UnBlank Part click to restore partially hiddenparts
Auto-Apply blank automatically (no need to click
Apply button) Auto-Update update display of solid surfaces and
edges automatically (no need to click Update Surf
or Update Edge)
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Element Tools Find
Purpose: find nodes/elements/parts/Cnrb Find any element by ID or specified type
Show Only shows found entity by itself
Highlight highlights found entity Neighbors propagates to neighboring elements
UnblankAll turns on all elements and parts
UnblankPart turns on all elements in part thatfound node/element belongs to
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Workshop 1
General Operations
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Workshop 1
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Workshop 1Load and view an LS-DYNA Keyword file...
Launch a new session of LS-PrePost
File > Open > LS-DYNA Keyword
(select /workshop1/belted.k)
Click View in the Keyword Reader Error interface
Click Done in the Message interface Use Shift + Left Click to rotate the model
Click the Auto Center (AutCen) render button (or hit
Ctrl+A)
Click the Mesh / HidEle / VieEle / WirEle / Feat / Edge /
Shrink render buttonsUse the part selection interface...
Go to Model Assembly and Part (SelPart) and select
individual parts from the list
Use Ctrl + Left Click to select multiple parts
Click All to display all parts Toggle Beam / Shell / Solid / Disc / SBelt
Click SortBy button and turn on/off some check boxes in
the setting columns in the Part Sort dialog
Click the MatTypeName header to see the sorting effect
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Workshop 1 (continued...)
Create a part group... Go to Model Groups
Click Create (all displayed parts will be saved to Group_43)
Go to Model Assembly and Part (SelPart) and manually turn on
some other parts
Go to Model Groups Select Group_43 from the list and click Select
Identify nodes and elements...
Turn on the mesh (using the Mesh render button)
Go to Element Tools Identify
Select Node in the Identify interface and pick some nodes in themodel to display their IDs
Select Element in the Identify interface and pick some elements
Toggle Elem Dir to display the N1 to N2 direction
Click the Clear render button to clear all highlighted entities
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Workshop 1 (continued...)
Modify part appearance... Go to Model Appearance
Select any one of the drawing modes Hide / Edge / Shad / Wire
Pick some parts in the model
Toggle Thick in the Appearance interface and click AllVis
Click the Zoom In render button (or hit Ctrl+Z) and zoom in on ashell part to verify that thickness is displayed
Blank some elements...
Go to Element Tools Blank
Select Area in the General Selection interface and draw a box to
blank some elements Click Reverse in the General Selection interface
Click Unblank All in the Blank interface
Click the Assembly and Part (SelPart) render button
Select 88 PSHELL from the list, click the Auto Center (AutCen)
render button, and click Done in the Assembly and Part interface
Toggle Prop (propagate) in the General Selection interface, select
Ang: 15, and pick an element on the front of the torso
Click Unblank All
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Workshop 1 (continued...)
Create a view... Go to Model Views
Click Create (the current view will be saved as View_01)
Rotate the model and click Create again
Select View_01 from the list and click Select
Click the ActAll render button to display the entire modelFind a node and element...
Go to Element Tools Find and select Show Only
Enter 1439 in the text field and click Find
Click Neighbors several times
Select Node in the Find interface
Enter 5340 in the text field and click Find
Click Neighbors several times
Click the Clear render button
Go to Model Assembly and Part (SelPart) Click All
Go to Element Tools Blank
Click Unblank All
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Workshop 1 (continued...)
Modify color and transparency... Go to Model Part Color (PtColor)
Select Transparency
Pick the roof of the structure and adjust the slider
Select Pick Through and pick through the roof to make
some additional components transparent Select Pick Toggle and pick the roof again to make it
opaque
Click Visible and drag the slider to the far left
Select Color
Pick a part and adjust its color using the RGB sliders Select Set and pick some additional parts
Select any color from color map
Click Backg (only works when View > Background >
Plain is selected)
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Mesh Generation
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Mesh Shape Mesher
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Mesh Shape Mesher
Purpose: mesh basic geometries Box_Solid, Box_Shell define min/max
coordinates and mesh density
4N-Shell define 4 corners and mesh density
Sphere_Solid, Sphere_Shell define center,
radius, and mesh density (quarter circle)
Cylinder_Solid, Cylinder_Shell define center,
direction, radius, length and mesh density (ifnumber of elements in circumferential direction is
multiple of 4, butterfly mesh will be create)
Circle_Shell define outer radius, inner radius (ifhole is desired), angle (to create an arc), mesh
density, and normal direction
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Create Position Interface
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Create Position Interface
Purpose: define an XYZ location By picking a position
By picking a node
At an element center At an edge midpoint
At the average center of nodes or elements
At the center of a circle New *NODE can be created
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Create Direction Interface
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Create Direction Interface
Purpose: define a direction By picking 2 positions
By picking 2 nodes
Along an element edge Along an element normal
Direction can be rotated about global or local
coordinate system
New *DEFINE_VECTOR can be created
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Mesh Auto Mesher (Size)
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Mesh Auto Mesher (Size)
Size mode creates uniformly sized elements Can be mix of quad and tri element or all tri only
Compute button will give rough estimate of
element size
Mesh by GPart will create separate LS-DYNA part
for each geometry part
Ignore Hole Size, hole size smaller than this value
will be ignore and be filled with elements
General meshing procedure...
Select surfaces to be meshed
Enter average element size Click Mesh
Click Accept
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Mesh Auto Mesher (Deviation)
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Mesh Auto Mesher (Deviation)
Deviation mode is tool mesher for metal stampingapplications
Deviation mode creates small elements on curved
surfaces and large elements on flat surfaces
4 parameters control the element size
Max element size
Min element size
Max deviation Max angle
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Mesh Solid Mesher
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Mesh Solid Mesher
Solid meshing by blocks Uses cut & dice method followed by sweeping
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Define cutting planes
on geometry
Cut and trim
into smallblocks
Sweep block faces to
form hex elements
Mesh N-Line Mesher
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Mesh N Line Mesher
Purpose: create mesh from 2/3/4 lines 2 Line Shell create mesh between 2 lines
3 Line Shell create mesh between 3 lines
4 Line Shell create mesh between 4 lines Enter number of elements on each edge
Or enter element size
Or use points on lines to create elements
Line Sweep sweep one line along another line
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Mesh Tetrahedron Mesher
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Purpose: create solid elements (tets) inside an enclosedshell volume
Limitation: only 1 skin part is accepted
Requirement: skin normals must be aligned
Skin can be remeshed to give better solid tet mesh
10-node tets can also be created
Solid tet mesh can be translated in space
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Mesh Element Generation (Beam)
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( )
Purpose: create beam elements On an edge
On a curve
By dragging nodes By spinning nodes
Along shell diagonals
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Mesh Element Generation (Shell)
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( )
Purpose: create shell elements On all outer surfaces of a solid
On individual solid faces
By dragging an edge By spinning an edge
By extending an edge
By dragging a curve
By spinning a curve
From a segment set
By filling holes
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Mesh Element Generation (Solid)
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( )
Purpose: create solid elements By dragging shells
By offsetting shells
By spinning shells Using shell thickness
By sweeping shells along a path
Between two shells sets
(must have identical mesh connectivity)
4-noded tet to 10-noded tet
Hex to 4-noded tet
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Workshop 2
Mesh Generation
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Workshop 2
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Create a solid cylinder and a shell cylinder...
Launch a new session of LS-PrePost
Go to Mesh Shape Mesher
Select Entity: Cylinder_Solid
Enter Radius: 5, Length: 10,
Num Ele (Circumferential): 32, Num (Length): 20 Enter XYZ: 0,0,1 for position
Click dirz (set direction to 0,0,1)
Click Create and Accept
Select Entity: Cylinder_Shell
Enter Num Ele: 30 (leave other parameters unchanged) Enter XYZ: 0,0,-1 for position
Click dirz again (changes direction to 0,0,-1)
Activate Top And Bottom (meshes ends of cylinder)
Click Create and Accept
Turn on the mesh (using the Mesh render button)
Rotate the model such that you can see the cross-section of both cylinders
(note the different cross-sectional mesh of the two parts)
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Workshop 2 (continued...)
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Create a mesh from 4 lines...
Launch a new session of LS-PrePost
File > Open > IGES File
(select /workshop2/test_4lmesh_curves.igs)
Click OK in the IGES Read Options popup
Go to Mesh N-Line Mesher Select Type: 4 Line Shell
Pick the longest curve
Pick the remaining curves in clockwise order
Enter N1: 24 (and hit Enter)
Enter N2: 12 (and hit Enter) Enter N3: 20 (and hit Enter)
Enter N4: 10 (and hit Enter)
Click Mesh It and Accept
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Workshop 2 (continued...)
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Sweep one line along another...
Launch a new session of LS-PrePost
File > Open > IGES File
(select /workshop2/sweep_lines.igs)
Click OK in the IGES Read Options popup
Go to Mesh N-Line Mesher Select Type: Line Sweep
Select Mesh By: Points of Line
Pick the square line
Pick the attached curve
Click Mesh It and Accept
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Workshop 2 (continued...)
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Sweep one line along another...
Go to Curve Circle
Select Method: Parameters
Click the . button next to Origin Point X
Select Geometry in the Create Position interface
Pick the endpoint of the remaining curve Click Done in the Create Position interface
Enter Direction X Y Z: 1 0 0
Enter Radius: 50 and click Apply
Go to Mesh N-Line Mesher
Select Mesh By: Number of elements
Pick the circle and click the up arrow several times to increase N1
Pick the curve and click the up arrow several times to increase N2
Click New PID
Click Mesh It and Accept
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Workshop 2 (continued...)
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Auto mesh an IGES file using Amesh...
Launch a new session of LS-PrePost
File > Open > IGES File
(select /workshop2/frame.igs)
Click OK in the IGES Read Options popup
Go to Mesh Auto Mesher
Select Size
Enter Elem Size: 1.5
Click Visible in the General Select interface
Click Mesh
Click Accept Turn off geometry (iges) rendering by clicking this icon
Click the Wireframe (mesh) render button
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Workshop 2 (continued...)
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Create a hollow cylinder using the block mesher...
Launch a new session of LS-PrePost
Go to Mesh Block Mesher
Select Type: Butterfly Blocks
Enter Length: 20
Enter L: 10 Activate Is Tubal
Enter Inner R: 4
Click Create
Rotate the model and note the synchronization
between the main window and Computation Window Highlight (by clicking and dragging over) the faces,
lines, and vertices in the Computation Window to see
how the 4 blocks are assembled to form the cylinder
Click Accept
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Workshop 2 (continued...)
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Mesh a part using the solid mesher...
Launch a new session of LS-PrePost
File > Open > STEP File
(select /workshop2/knuckle.stp)
Go to Geometry Tool Heal
(to remove unnecessary vertices)
Select Vertex
Select Remove
Click Analysis (see figure)
Click Apply
Go to Geometry Tool Simplify Select Unfillet Face
Click in the Fillet Surfaces List box
Pick the small surfaces (see figure)
Click Apply
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Mesh a part using the solid mesher...
Go to Reference Geometry Plane
Select Method: Normal to Curve
Pick an edge and a vertex to define a trimming plane
(see figure)
Click Apply
Repeat 3 times
(to create a total of 4 trimming planes)
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Mesh a part using the solid mesher...
Go to Geometry Tool Trim
Select Cut Solid
Click in the Trim Tool box
Pick a trim plane
Click in the Be Trimmed Solid box Pick the solid part
Click Apply
Repeat 4 times
(to trim the solid into a total of 6 parts)
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Mesh a part using the solid mesher...
Go to Geometry Tool Heal
(to remove duplicated faces)
Select Face
Click Analysis
Click Apply
Go to Geometry Tool Stitch
Activate All Faces
Activate Non-manifold Mode
Deactivate Group by Part
Click Apply
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Workshop 2 (continued...)
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Mesh a part using the solid mesher...
Right-click RefGeom under Assembly 1 in the feature
tree (upper left corner of main window) and select
Reverse Blank
Go to Mesh Solid Mesher
(to suppress unwanted boundaries)
Select Suppress
Pick unwanted boundary lines
(see dashed lines in figure)
Select Meshing
Enter Elem Size: 1.2
Click Try Meshing Automatically
Click Accept
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Pre-Processing
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Element Tool Element Editing
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Purpose: modify an existing mesh by editing elements Element Editing Tools
Check (quality)
Create (beam, shell, tetra, penta, hexa, discrete)
Delete
Split / Merge
Modify (thickness)
Direction (change for orthotropic materials)
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Element Tool Element Editing (Split/Merge)
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Shell elements can be split into quads or tris Constrain Adaptive button If checked
(*CONSTRAINED_ADAPTIVITY automatically
created when splitting deformable elements)
Click edge of element for splitting into 2elements, can be perpendicular or parallel to
edge
Two quads can be merged into a single quad Solid elements can also be split
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Element Tool Node Editing
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Purpose: modify an existing mesh by editing nodes Node Editing Tools
Create to create new nodes, use Advance button tocreate nodes using different methods
Delete to delete unreferenced (no other element orentity attached to it)
Replace to replace one node with another node(merge) or take the center point of the 2 nodes
Align to align nodes that is close to a line formed by 2points
Modify (xyz coordinates)
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Element Tool Node Editing (Align)
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Define line by picking two points Select nodes that will be snapped to the line
Option to use Nodes or Point on Element
SpNdEQ special option to put node in equal
spacing when align to the line
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Element Tool Node Editing (Replace)
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Two nodes replacement Merge two nodes into one
Option to choose final position of merged node(Node1, Node2, MidPoint)
Single pick or area select Multiple (Many) nodes replacement
Merge multiple nodes into one
Option to choose final position of merged node
(Center, Node, Position) General Selection interface used to select nodes
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Element Tools Normals
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Purpose: show/reverse/align element normal Shell color indicates direction of normal
General Selection interface can be used to manually
show or reverse normal vectors
Automatic alignment (Auto Reverse) can be
performed by picking a seed element
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Element Tools Detach
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Purpose: detach elements from an existing mesh Shell, Beam, Solid, Tshell detach elements by type
Node detach all elements connected to a node
Element Select group of elements to be detached
Edge Select edges of elements to be detached
Starting NID Enter starting ID for new nodes
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Element Tools Duplicate Nodesshow and merge duplicate (coincident) nodes
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g p ( )
Tolerance is automatically calculated but can be
overridden
Option to keep smaller or larger Node ID
Option to put new node at the xyz centroid of allmerged nodes
Show Dup Nodes will show all the nodes that
meet the tolerance criterion Select Nodes allow user to select subset of
nodes shown
Merge Dup Nodes will perform the merging of
the duplicated Nodes
Option to delete degenerated elements (elements
with zero area)
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Element Tools Measure
Purpose: take measurements of various items
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Purpose: take measurements of various items
Item list of available measurements
Coordinate xyz coordinate
Dist N2N distance between 2 nodes
Dist N2S distance between a node and a surface Dist P2P distance between 2 points
Angle 3Node angle between 3 nodes
Angle 4node angle between 2 lines formed by 4 nodes
3Pt Radius the radius formed by 3 nodes
Area / Volume / Mass / Inertia
Ang Vel angular velocity
Separation distance between two parts
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Element Tools Measure (continued...)
Active Elements Only for certain quantities (e g
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Active Elements Only for certain quantities (e.g.,
Area, Volume, Mass, Inertia)
Element/Part/All measure by element, by part, or
all
Cancel pick remove last picked entity
Apply take measurement
Reference Axes select current reference axes for
measurement (define axis using Item: Create Axis) History depends on selected item
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Workshop 3
Pre-Processing
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Workshop 3Merge duplicate nodes...
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Launch a new session of LS-PrePost
File > Open > LS-DYNA Keyword (select /workshop3/badmesh.k)
Go to Element Tools Duplicate Nodes and turn on the mesh
(using the Mesh render button)
Activate Show Free Edges
Click Show Dup Nodes (see upper right figure)
Click Merge Dup Nodes
Click Accept
Enter Tolerance: 1.0
Click Show, Merge, and AcceptReplace nodes...
Go to Element Tool Node Editing
Select Replace
Select Area and MidPoint
Select two nodes at a time for merging (by drawing a window)
Click Accept
Repeat until all internal free edges have been eliminated
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Workshop 3 (continued...)Create a tria element...
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Go to Element Tool Element Editing
Select Create
Select Elem Type: Shell
Activate PID and pick the part
Activate Tria Only
Pick the 3 nodes to fill the final gap in the part
Click Accept
Align nodes along a line...
Go to Element Tool Node Editing
Select Align Click the Right render button
Click the Zoom In render button and zoom in as shown
Pick 2 nodes to form a line
Pick the nodes in between
Click Align
Click Accept
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Workshop 3 (continued...)Split elements...
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Go to Element Tool Element Editing
Select Split/Merge
Pick the elements around the hole as shown
Click Apply
Click Accept
Fill a hole...
Go to Mesh Element Generation
Select Shell
Select Shell By: Fill_Holes
Pick any node on the perimeter of the hole Click Create
Click Accept
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Workshop 3 (continued...)Align shell normals...
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Go to Element Tools Normals
Select Show Normals (should be already selected)
Click Visible in the General Selection interface
Select Vector Size: 0.5
Select Auto Reverse
Activate Pick Seed
Pick any element that is red
Click AutoRev
Click Done
Save the modified input file... File > Save As > Save Keyword As...
Click Browse
Enter a file name (save as /workshop3/newmesh.k)
Click Save
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Pre-Processing(continued)
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Application Model Checking
Purpose: identify and clean unreferenced or undefined entities
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Model Display Entity
Purpose: visualize model entities (keywords) other than
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nodes and elements (which are displayed by default)
Available options include
*BOUNDARY_{OPTION}
*CONSTRAINED_{OPTION} *INITIAL_VELOCITY_{OPTION}
*LOAD_{OPTION}
*RIGIDWALL_{OPTION}
*SET_{OPTION}
Use while post-processing by loading d3plots
followed by the corresponding keyword file
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Model Reference Check (Attach)
Purpose: identify entities that are attached to other
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model entities
Initial attachment set can be all visible or as selected
(using General Selection interface)
Attachment set can grow By Part or By Element
Final attachment set can be written to a file
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Model Renumber
Purpose: renumber and offset model
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entities
By Keyword Entities can be
renumbered/offset by Keyword
ID range can be specified Entities can be picked using the General
Selection interface
By Part Parts/Elements/Nodes can be
renumbered/offset by Part
By Selected Parts/Elements/Nodes can
be renumbered/offset by Selected
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Element Tools Move/Copy
Purpose: move or copy elements from one part to
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another
Use General Selection interface to select elements
Target part can be a non-existent
Starting IDs for new elements and nodes can be
specified when performing a copy
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Element Tools Offset
Purpose: offset shells (always in normal direction)
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Offset Distance distance to offset
Element normals must be aligned before offsetting
Beware of offsetting small radii inward
Elements can be copied while offsetting
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Element Tools Transform (Translate)
Purpose: translate nodes/elements/parts
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Translate Distance distance to translate
X,Y,Z directions can be in global or local system
N1-N2 translate in the direction from N1 to N2
N1-N2-N3 translate in the direction normal to
the plane formed by N1, N2, and N3
N1-to-N2 translate using the distance and
direction between N1 and N2 Pt-to-Pt translate using the distance and
direction between P1 and P2
Sh-Normal pick a shell element and use itsnormal as the direction of the translation
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Element Tools Transform (Translate)
Free Edit after distance, direction and node
l ti d th l t d d
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selection, user can drag the selected nodes on
screen
Copy Elem copy elements while translating
Copy Node copy nodes while translating Transfer transfer selection to copied elements
Multiple copies can be created
New elements can be placed in a new part ID User can enter starting element ID for new
elements
User can enter starting node ID for new nodes
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Element Tools Transform (Rotate)
Purpose: rotate nodes/elements/parts
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Rot. Angle angle to rotate in degree
X,Y,Z axes can be in global or local coordinates
N1-N2 rotate about an axis from N1 to N2
N1-N2-N3 rotate about the normal formed by N1,
N2, and N3
Origin of rotation can be a node or XYZ location
Elements/Nodes can be copied while rotating
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Element Tools Transform (Reflect)
Purpose: reflect nodes/elements/parts
/ / fl l l b l
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Norm X/Y/Z reflect along global axes
N1-N2 reflect along the direction from N1 to N2
N1-N2-N3 reflect along the normal formed by N1,
N2, and N3
Origin of reflection can be a node or an XYZ location
Elements/Nodes can be copied while reflecting
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Element Tools Transform (Project)
Purpose: project nodes and elements
N X/Y/Z j t l l b l
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Norm X/Y/Z project along global axes
N1-N2 project along the direction from N1 to N2
N1-N2-N3 project along the normal formed by N1,
N2, and N3
Can also project To Mesh, To Curve, or To Surface
Point on plane of projection can be a node or an XYZ
location Elements can be copied while projecting
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Element Tools Transform (Scale)
Purpose: scale nodes/elements/parts
S l F t t th 1 t l l th 1
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Scale Factor greater than 1 to enlarge, less than 1
to shrink (when using Scale+)
X,Y,Z scale in either global or local coordinate
system N1-N2 scale in direction from N1 to N2
N1-N2-N3 scale in direction of normal formed by
N1, N2, and N3 Origin can be a node or a XYZ location
Elements/Nodes can be copied while scaling
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Element Tools Transform (Transform)
Purpose: transform nodes/elements/parts from one
coordinate system to another
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coordinate system to another
From pick 3 nodes (first set of P1,P2,P3) to define a
starting system
To pick 3 nodes (second set of P1,P2,P3) to definea destination system
P1-P3 buttons launch Create Position interface
Elements can be copied while transforming
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Element Tools Smooth
Purpose: smooth a mesh to improve element quality
Use General Selection interface to select elements
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Use General Selection interface to select elements
Specified nodes can be locked to prevent movement
Nodes along feature angles are not moved
Boundary nodes can be fixed or free
User specified number of smoothing iterations can
be applied
Nodes can be projected back to geometry aftersmoothing
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Element Tools Part Trim
Purpose: trim a mesh using a curve
Parts first choose the parts to be trimmed
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Parts first, choose the parts to be trimmed
Trim Curves second, select curves for trimming
Trim Methods (projecting curves to mesh)...
Closest 3D projection
Vector projection (along a specified vector)
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Workshop 4Mesh Transformation
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Workshop 4Create nodes at circle centers...
Launch a new session of LS-PrePostFil O LS DYNA K d
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File > Open > LS-DYNA Keyword
(select /workshop4/tube1.k)
Click the Wire render button
Go to Element Tool Node Editing
Select Create
Click Advanced
Select 3PtCircle in the Create Position interface
At one end of the large tube, pick 3 nodes on the
perimeter and click Apply
Repeat for the other end of the large tube and both
ends of the small tube
Click Cancel in the Create Position interface
Click Accept
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Workshop 4 (continued...)Transform a mesh...
Go to Element Tools TransformSelect Transform
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Select Transform
Activate From
Pick one center node of the small tube (as P1)
Pick the other center node of the small tube (as P2)
Pick any node on the end of the tube near P1 (as P3)
Activate To and repeat the same for the large tube
(P1-P3 must be picked in a similar sequence)
Select ByPart in the General Selection interface
Pick the small tube
Click Save To Buffer Buffer5 in the General
Selection interface
Click Transform
Click Accept
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Workshop 4 (continued...)Translate a mesh...
Go to Element Tools Transform Select Translate
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Select Translate
Select Direction: N1-N2
Pick both center nodes of the large tube
(to define Node1 and Node2)
Enter Translate Distance: 20
Click Load From Buffer Buffer5 in the General
Selection interface
Click Tran +
Click Accept
Save the modified input file...
File > Save As > Save Keyword As...
Click Browse
Enter a file name (save as /workshop4/newtube.k)
Click Save
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Pre-Processing(continued)
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Model Part DataThere are 7 functions in the Part
Data dialog:
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Show show existing part
data
Create create new part data Mod modify existing data
Sear search parts by
parameters
Assign assign part data
properties
Prop edit properties of part
data Replace replace a part with
another part
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Model Part Data Show Show / Delete /
Write part dataP t b l t d
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Parts can be selectedgraphically using Pick/Area/
Poly or from the list
Show will list element type ofthe part, its properties, no. of
nodes and elements, and the
Min/Max IDs
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Model Part Data Cre Create new part
definitionsN ID t k i ti t d t
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NewID take existing part dataand create a new part ID
Add create new part with no
data (SECID, MID, etc...) Contact if this box is check,
will create *PART_CONTACT
data
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Model Part Data
Mod Modify existing
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part definitions
Changes can only be made
to one part at a time
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Model Part Data Assign Assign properties
to parts Changes can be made to
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Changes can be made tomany parts at once
Multiple select from list to
highlight parts that will bechanged
Empty fields will not beassigned
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Model Part Data Prop Review part properties
(Section, Material, Hourglass, )M dif k d i t f
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Modify open a keyword input formfor editing
RefBy show all parts that reference
the selected property
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RefBy popupdialog
Model Part Data Replace replace a part in one model
with another part from anothermodel
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model
The second model can be loaded with
the Load button
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Replace this part with
another part that hasfiner mesh
Model Entity Interface
A uniform interface to deal with LS-DYNA
entities that can be shown graphically
h h h
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Show to show the entities
Create to create the entity
Modify modify the existing entities Delete delete entites
Write entity data to a file
General selection is used whenever it ispossible for selecting the entities
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Model Create Entity Set Data
Show *SET_{OPTION}
Create *SET_{OPTION}
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OPTIONS NODE, BEAM, DISCRETE, PART,SEGMENT, SHELL, SOLID, THICK SHELL
Select entities using General Selection interface
Modify *SET_{OPTION}
Sets must be shown before they can be modified
Delete *SET_{OPTION}
Write *SET_{OPTION} to a file
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Boundary Spc
Show *BOUNDARY_SPC_{OPTION}
Label None/Symbol/Detail
Local coordinate systems will be shown if used
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Local coordinate systems will be shown if used
Match Filter by constrained DOFs
Create *BOUNDARY_SPC_{OPTION} OPTIONS NODE, NODE_SET
Use General Selection interface to select nodes
Activate constrained DOFs
Use global or local coordinate system
Modify *BOUNDARY_SPC_{OPTION}
Delete *BOUNDARY_SPC_{OPTION}
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Initial Velocity
Show *INITIAL_VELOCITY
Create *INITIAL_VELOCITY
*INI IAL V LOCI Y NO l
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For *INITIAL_VELOCITY_NODE only
Use General Selection interface to select nodes
Modify *INITIAL_VELOCITY Delete *INITIAL_VELOCITY
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Rigidwall Rigidwall
Show *RIGIDWALL_{OPTION}
Create *RIGIDWALL_{OPTION}
OPTIONS GEOMETRIC PLANAR
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OPTIONS GEOMETRIC, PLANAR
Select geometry type(cylinder/flat/prism/sphere)
Activate additional planar options(finite/forces/moving/ortho)
Define position and normal direction
Modify *RIGIDWALL_{OPTION} Delete *RIGIDWALL_{OPTION}
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Database Cross Section
Show *DATABASE_CROSS_SECTION_{OPTION}
Create *DATABASE_CROSS_SECTION_{OPTION}
OPTIONS PLANE SET
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OPTIONS PLANE, SET
Define position and normal direction
Modify *DATABASE_CROSS_SECTION_{OPTION} Delete *DATABASE_CROSS_SECTION_{OPTION}
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Database History
Show *DATABASE_HISTORY_{OPTION}
Create *DATABASE_HISTORY_{OPTION}
OPTIONS NODES BEAM SHELL SOLID SPH TSHELL
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OPTIONS NODES, BEAM, SHELL, SOLID, SPH, TSHELL
Use General Selection interface to select entities
Modify *DATABASE_HISTORY_{OPTION} Delete *DATABASE_HISTORY_{OPTION}
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Define Box
Show *DEFINE_BOX_{OPTION}
Create *DEFINE_BOX_{OPTION}
OPTIONS ADAPITVE COARSEN
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OPTIONS ADAPITVE, COARSEN
Define box extents
Translate or scale box Modify *DEFINE_BOX_{OPTION}
Delete *DEFINE_BOX_{OPTION}
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Define Vector
Show *DEFINE_VECTOR
Create *DEFINE_VECTOR
Define origin and direction
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Define origin and direction
Modify *DEFINE_VECTOR
Delete *DEFINE_VECTOR
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Define Coordinate System
Show *DEFINE_COORINATE_{OPTION}
Create *DEFINE_COORINATE_{OPTION}
OPTIONS NODES SYSTEM VECTOR
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OPTIONS NODES, SYSTEM, VECTOR
Define title
Pick nodes or define vectors Set additional parameters
Modify an existing coordinate system
Modify *DEFINE_COORINATE_{OPTION}
Delete *DEFINE_COORINATE_{OPTION}
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Element Seatbelt Accelerometer
Show *ELEMENT_SEATBELT_ACCELEROMETER
Create *ELEMENT_SEATBELT_ACCELEROMETER
Pick N1-N3
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Pick N1 N3
Set other flags
Modify *ELEMENT_SEATBELT_ACCELEROMETER Delete *ELEMENT_SEATBELT_ACCELEROMETER
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Element Mass
Show *ELEMENT_MASS
Label Mass Value/Mass ID/Detail/None
Create *ELEMENT MASS
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_
Use General Selection interface to select nodes
Enter mass value Activate PID option
Modify *ELEMENT_MASS
Delete *ELEMENT_MASS
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Constrained Spotweld
Show *CONSTRAINED_SPOTWELD
Create *CONSTRAINED_SPOTWELD
Use Autocreate to create when N2 is picked
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p
Enter failure criteria
Modify *CONSTRAINED_SPOTWELD Delete *CONSTRAINED_SPOTWELD
CDelete (check and delete) invalid spotwelds
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Constrained Generalized Weld Spot
Show *CONSTRAINED_GEN_WELD_SPOT
Create *CONSTRAINED_GEN_WELD_SPOT
Use General Selection interface to select nodes
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Click EditPara to define failure parameters
Modify *CONSTRAINED_GEN_WELD_SPOT Delete *CONSTRAINED_GEN_WELD_SPOT
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Constrained Tied Nodes Failure
Show *CONSTRAINED_TIED_NODES_FAILURE
Create *CONSTRAINED_TIED_NODES_FAILURE
Use General Selection interface to select nodes
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Enter failure strain
Modify *CONSTRAINED_TIED_NODES_FAILURE Delete *CONSTRAINED_TIED_NODES_FAILURE
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Constrained Rivet
Show *CONSTRAINED_RIVET
Create *CONSTRAINED_RIVET
Use Autocreate to create when N2 is picked
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Enter death (failure) time
Modify *CONSTRAINED_RIVET Delete *CONSTRAINED_RIVET
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Constrained Node Set
Show *CONSTRAINED_NODE_SET
Create *CONSTRAINED_NODE_SET
Use General Selection interface to select nodes
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Set active DOF
Enter death (failure) time
Modify *CONSTRAINED_NODE_SET
Delete *CONSTRAINED_NODE_SET
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Constrained Nodal Rigid Body (CNRB)
Show *CONSTRAINED_NODAL_RIGID_BODY
Create *CONSTRAINED_NODAL_RIGID_BODY
OPTION SPC
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Use General Selection interface to select nodes
Set additional flags
Modify *CONSTRAINED_NODAL_RIGID_BODY
Delete *CONSTRAINED_NODAL_RIGID_BODY
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File Import (Combine Keyword Files)
Each keyword file defines a subsystem
Import Offset causes all entity IDs to by automatically
offset by largest ID currently in use
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offset by largest ID currently in use
Import NoOffset performs no offsetting (use with
caution)
Setting Offset allows custom offsetting based on
keyword type (see next slide)
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File Import (Combine Keyword Files)
Setting Offset interface
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Model Keyword Manager
All LS-DYNA keywords are accessible
through Keyword Manager tree list (over900 total)
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Keywords that exist in the current model
are shown in Blue
Click All to display all keywords (or click
Model to display only those that exist in
the current model)
Expand the tree and double-click to edit a
keyword (opens Keyword Input Form)
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Keyword Input Form
Example Keyword Input form for *PART
Keyword type List of existing keywords of this type
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Keyword type List of existing keywords of this type
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Keyword Input Form (continued...)
Keyword Input form buttons
Always click first when creating a new card
Draw entity in the graphics window
Commit changes
Delete/Undeletef i f
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Open interface to pick
data directly from model
Create fresh keyword
using default values
Delete/Undelete
selected keyword
Set all entries to
Default values
Exit keyword editing form
Popup RefBy interface
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Keyword Input Form (continued...)
Keyword Input form controls
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Card Number
Parameter Names
Parameter Values
Link Button
Drop-down Menu
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Keyword Input Form (continued...)
Other Keyword Input form features
Blue parameter titles can be clicked to display description inbottom text area (see below)
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Red parameters indicate that additional cards may be
displayed depending on the parameter value
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Click in any field above to display description here
(same information found in LS-DYNA Keyword Manual)
User comments can be entered here
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Model MSelect Compare
Purpose: compare two similar LS-DYNA keyword input
files that have minor differences Disregards keyword order, unlike other
compare/difference software
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compare/difference software
Normalizes data to ignore differences below acertain tolerance
Provides a summary only when a large number of
differences are detected
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File Save Keyword As
Output Version 960/970/971
(only change if using an oldversion of LS-DYNA)
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Renumber/Offset can
renumber or offset beforesaving
BySubSystem activate to save
subsystems to separate files(not visible unless model
contains subsystems)
Advanced... additional options(see next slide)
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Advanced Settings Interface
Keyword order can be customized
Keywords can be selectively omitted
Title, Field Names, and Comments can be omitted
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Parameter names can be output instead of actual values
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File Save Active Keyword As
Output Version 960/970/971
(only change if using an oldversion of LS-DYNA)
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Keywords can be selectively
output using the AdvancedSetting interface
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Workshop 5Create a Keyword File
(Ball to Plate Impact)
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Workshop 5Mesh a plate from IGES data...
Launch a new session of LS-PrePost
File > Open > IGES File
(select /workshop5/plate.igs)
Click OK in the IGES Read Options popup
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Go to Mesh Auto Mesher
Enter Elem Size: 15 Pick the surface in graphics area
Click Mesh
Click Accept
Mesh a sphere...
Go to Mesh Shape Mesher Select Entity: Sphere_Solid
Enter Radius: 50
Enter Density: 6
Enter Center Z: 55
Enter Target Name: ball
Click Create and Accept
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Workshop 5 (continued...)Define plate material...
Go to Model Keyword Manager
Select All
Expand MAT
Double-click 024-PIECEWISE_LINEAR_PLASTICITY
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Click NewID in the Keyword Input Form
Enter TITLE: plate material Enter RO: 7.8e-6
Enter E: 200.0
Enter PR: 0.3
Enter SIGY: 0.2
Enter ETAN: 2.0
Enter FAIIL: 0.1
Click Accept
Click Done
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Workshop 5 (continued...)Define plate section...
Expand SECTION
Double-click SHELL
Click NewID in the Keyword Input Form
Enter TITLE: plate section
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Enter NIP: 5
Enter T1: 1.5 (and hit the Enter key) Click Accept
Click Done
Import ball properties (material and section)...
File > Import > LS-DYNA Keyword (select /workshop5/ball_properties.k)
Click Import Offset in the Import File interface
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Workshop 5 (continued...)Assign plate properties...
Go to Model Part Data
Select Mod
Select S 1 SHELL1 from the list
Enter Part Title: plate
Cli k S C
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Click SECID
Select 1 plate section in Link SECTION interface Click Done in Link SECTION interface
Click MID
Select 1 plate material in Link MAT interface
Click Done in Link MAT interface
Click Accept
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Workshop 5 (continued...)Assign ball properties...
Go to Model Keyword Manager
Expand PART
Double-click PART
Select 2 ball in the Keyword Input Form
Cli k th Li k B tt t t th SECID fi ld
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Click the Link Button next to the SECID field
Select 2 ball section in Link SECTION interface Click Done in the Link SECTION interface
Click the Link Button next to the MID field
Select 2 ball material in Link MAT interface
Click Done in the Link MAT interface
Click Accept
Click Done
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Workshop 5 (continued...)Create plate boundary SPCs...
Go to Model Create Entity
Expand Boundary
Select Spc
Select Cre
Create Set
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Create Set
Activate X, Y, and Z Select Area in the General Selection interface
Click and drag to select all plate edge nodes
(select nodes on each edge separately)
Click Apply
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Workshop 5 (continued...)Create ball initial velocity...
Expand Initial
Select Velocity
Select Cre
Enter Vz: -20
Select Pick in the General Selection interface
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Select Pick in the General Selection interface
Select ByPart in the General Selection interface Pick the ball
Click Apply
Click the Left render button
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Workshop 5 (continued...)Create part set for contact...
Expand Set Data
Select *SET_PART
Select Cre
Enter Title: contact
Click Visible in the General Selection interface
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Click Visible in the General Selection interface
Click ApplyDefine contact...
Go to Model Keyword Manager
Expand CONTACT
Double-click AUTOMATIC_SINGLE_SURFACE
Click NewID in the Keyword Input Form
Set SSTYP: 2
Click the Link Button next to the SSID field
Select 1 contact in the Link SET interface
Click Done in the Link SET interface
Click Accept
Click Done
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Workshop 5 (continued...)Set termination time...
Expand CONTROL
Double-click TERMINATION
Enter ENDTIM: 10 in the Keyword Input Form
Click Accept
Click Done
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Click Done
Set d3plot frequency... Expand DATABASE
Double-click BINARY_D3PLOT
Enter DT: 1 in the Keyword Input Form
Click Accept
Click Done
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Workshop 5 (continued...)Set ASCII output frequency...
Expand DATABASE
Double-click ASCII_option
Enter Default DT: 0.1 (and hit the Enter key)
Scroll down and activate GLSTAT (global statistics)
Set BINARY: 3 for GLSTAT
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Set BINARY: 3 for GLSTAT
Activate MATSUM (material summary) Click Accept
Click Done
Save keyword file...
File > Save As > Save Keyword As...
Deactivate BySubSystem
Click Browse (save as /workshop5/ball_and_plate.k)
Click Advanced
Click Customize Order: Expert
Click Ok in the Advanced Setting interface
Click Save in the Save Keyword interface
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Workshop 5 (continued...)Compare a set of LS-DYNA Keyword files...
Launch a new session of LS-PrePost
File > Open > LS-DYNA Keyword
(select /workshop5/compare/belted1.k)
File > Open > LS-DYNA Keyword
(select /workshop5/compare/belted2.k)
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Go to Model MSelect
Select Compare
Click in the 1st Model field and select model 1
Click in the 2nd Model field and select model 2
Click Compare
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Workshop 5 (continued...)Compare a set of LS-DYNA Keyword files...
Select the Common Keywords tab
Examine the RED items to identify differences
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Workshop 6Create a Keyword File
(S-Rail to Rigidwall Impact)
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Workshop 6Import and mesh IGES surfaces...
Launch a new session of LS-PrePost
File > Open > IGES File (select /workshop6/channel.igs)
Click OK in the IGES Read Options popup
Go to Mesh Auto Mesher
Enter Elem Size: 6
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Click Visible in the General Selection interface Click Mesh
Click Accept
Go to Geometry Tool Manage
Click Visible in the General Selection interface
Click Delete in the Geometry Management interface File > Import > IGES File (select /workshop6/flat.igs)
Click OK in the IGES Read Options popup
Go to Mesh Auto Mesher
Click Visible in the General Selection interface
Click Mesh
Click Accept
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Workshop 6Define section property...
Go to Model Keyword Manager
Select All
Expand SECTION
Double-click SHELL
Click NewID in the Keyword Input Form
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Enter TITLE: 1.0mm Enter ELFORM: 16
Enter T1: 1.0 (and hit the Enter key)
Click Accept
Click Done
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Workshop 6 (continued...)Define material property...
Expand MAT
Double-click 024-PIECEWISE_LINEAR_PLASTICITY
Click NewID in the Keyword Input Form
Enter TITLE: Mild Steel
Enter RO: 7.83e-6
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Enter E: 207.0 Enter PR: 0.3
Enter SIGY: 0.2
Enter ETAN: 2.0
Click Accept
Click Done
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Workshop 6 (continued...)Assign section and material...
Go to Model Part Data
Select Assign
Click All