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

LS-PrePost Intro | Jul 30, 2012

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 -

22012 Livermore Software Technology Corporation


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Overview

LS-PrePost Intro | Jul 30, 2012 32012 Livermore Software Technology Corporation


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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

LS-PrePost Intro | Jul 30, 2012 8

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

LS-PrePost Intro | Jul 30, 2012 2012 Livermore Software Technology Corporation 9


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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


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


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)


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


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


l l d f


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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


El T l Id if


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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


El T l Bl k


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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)


El t T l Fi d


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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


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


Workshop 1 ( i d )


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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


Workshop 1 ( ti d )


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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


Workshop 1 ( ti d )


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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


Workshop 1 (continued )


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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


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


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


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


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


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


Mesh Solid Mesher


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Mesh Solid Mesher

Solid meshing by blocks Uses cut & dice method followed by sweeping


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


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


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


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


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


Workshop 2


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Create a solid cylinder and a shell cylinder...


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)


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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Create a mesh from 4 lines...


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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Sweep one line along another...



(select /workshop2/sweep_lines.igs)


Go to Mesh N-Line Mesher Select Type: Line Sweep

Select Mesh By: Points of Line

Pick the square line

Pick the attached curve





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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





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Auto mesh an IGES file using Amesh...



(select /workshop2/frame.igs)


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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Create a hollow cylinder using the block mesher...


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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Mesh a part using the solid mesher...


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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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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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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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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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


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)


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


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)


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


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


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


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


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)


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


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


Workshop 3Merge duplicate nodes...


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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


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...


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


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


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)


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


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


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


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


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


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


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


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


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


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


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


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


Element Tools Smooth

Purpose: smooth a mesh to improve element quality



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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


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


Workshop 4Create nodes at circle centers...

Launch a new session of LS-PrePostFil O LS DYNA K d


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(select /workshop4/tube1.k)

Click the Wire render button


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


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


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)


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


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


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


Model Part Data

Mod Modify existing


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part definitions

Changes can only be made

to one part at a time


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


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


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



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



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



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}



Initial Velocity

Show *INITIAL_VELOCITY

Create *INITIAL_VELOCITY

*INI IAL V LOCI Y NO l


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For *INITIAL_VELOCITY_NODE only


Modify *INITIAL_VELOCITY Delete *INITIAL_VELOCITY



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}



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}



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}



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}



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


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}


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


Element Mass

Show *ELEMENT_MASS

Label Mass Value/Mass ID/Detail/None

Create *ELEMENT MASS


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_


Enter mass value Activate PID option

Modify *ELEMENT_MASS

Delete *ELEMENT_MASS


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


Constrained Generalized Weld Spot

Show *CONSTRAINED_GEN_WELD_SPOT

Create *CONSTRAINED_GEN_WELD_SPOT



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Click EditPara to define failure parameters

Modify *CONSTRAINED_GEN_WELD_SPOT Delete *CONSTRAINED_GEN_WELD_SPOT


Constrained Tied Nodes Failure

Show *CONSTRAINED_TIED_NODES_FAILURE

Create *CONSTRAINED_TIED_NODES_FAILURE



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Enter failure strain

Modify *CONSTRAINED_TIED_NODES_FAILURE Delete *CONSTRAINED_TIED_NODES_FAILURE


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


Constrained Node Set

Show *CONSTRAINED_NODE_SET

Create *CONSTRAINED_NODE_SET



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Set active DOF

Enter death (failure) time

Modify *CONSTRAINED_NODE_SET

Delete *CONSTRAINED_NODE_SET


Constrained Nodal Rigid Body (CNRB)

Show *CONSTRAINED_NODAL_RIGID_BODY

Create *CONSTRAINED_NODAL_RIGID_BODY

OPTION SPC


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Set additional flags

Modify *CONSTRAINED_NODAL_RIGID_BODY

Delete *CONSTRAINED_NODAL_RIGID_BODY


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)


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)


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


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



Keyword Input form controls


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Card Number

Parameter Names

Parameter Values

Link Button

Drop-down Menu



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


Click in any field above to display description here

(same information found in LS-DYNA Keyword Manual)

User comments can be entered here


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


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)


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


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)


Workshop 5Mesh a plate from IGES data...



(select /workshop5/plate.igs)



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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



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


Workshop 5 (continued...)Define plate section...

Expand SECTION

Double-click SHELL


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


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


Workshop 5 (continued...)Assign ball properties...


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


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


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


Workshop 5 (continued...)Create part set for contact...

Expand Set Data

Select *SET_PART

Select Cre

Enter Title: contact



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Click ApplyDefine contact...


Expand CONTACT

Double-click AUTOMATIC_SINGLE_SURFACE


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


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


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


Workshop 5 (continued...)Compare a set of LS-DYNA Keyword files...



(select /workshop5/compare/belted1.k)


(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


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)


Workshop 6Import and mesh IGES surfaces...


File > Open > IGES File (select /workshop6/channel.igs)



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 Delete in the Geometry Management interface File > Import > IGES File (select /workshop6/flat.igs)




Click Mesh

Click Accept


Workshop 6Define section property...


Select All

Expand SECTION

Double-click SHELL



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Enter TITLE: 1.0mm Enter ELFORM: 16

Enter T1: 1.0 (and hit the Enter key)

Click Accept

Click Done


Workshop 6 (continued...)Define material property...

Expand MAT

Double-click 024-PIECEWISE_LINEAR_PLASTICITY


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


Workshop 6 (continued...)Assign section and material...

Go to Model Part Data

Select Assign

Click All

LS-PrePost Intro 073012

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Transcript of LS-PrePost Intro 073012