Output Manual For LS-DYNA - TrueGrid

1 TrueGrid Output Manual For LS-DYNAA Guide and a ReferenceVersion Rainsberger and Mike BurgerXYZ Scientific Applications, 2007 by XYZ Scientific Applications, Inc. All Rights Reserved2 May 15, 2007 TrueGrid Output Manual For LS-DYNAC opyright 2007 by XYZ Scientific Applications, Inc. All rights , the TrueGrid Output Manual for LS-DYNA , and related products of XYZ Scientific Applications, Inc. arecopyrighted and distributed under license agreements. Under copyright laws, they may not be copied in whole or in partwithout prior written approval from XYZ Scientific Applications, Inc.

2 The license agreements further restrict use Scientific Applications, Inc. makes no warranty regarding its products or their use, and reserves the right to change itsproducts without notice. This Manual is for informational purposes only, and does not represent a commitment by XYZS cientific Applications, Inc. XYZ Scientific Applications, Inc. accepts no responsibility or liability for any errors orinaccuracies in this document or any of its is a registered trademark of XYZ Scientific Applications, other product names appearing in this book may also be trademarks or registered trademarks of their trademark 2007 by XYZ Scientific Applications, Inc.

3 All Rights ReservedTrueGrid Output Manual For LS-DYNA May 15, 20073 Table of ContentsTable of LS-DYNA Output Features in (or Contact) and Boundary ..20 Load Walls ..23 Thick and Rigid , Dampers and Point ..25 Shared Nodes with Particle Hydro (SPH) ..26 Data for Post Processing ..27 Unsupported Features in LS-DYNA Output 1impacting 2cascading LS-DYNA beam user-defined integration a string of beam elements ..34bsdglobal beam cross section beams in the i-direction (part phase)..41lsdyeosLS-DYNA3D equation of materials.

4 48lsdynaselect LS-DYNA Output LS-DYNA analysis and database 2007 by XYZ Scientific Applications, Inc. All Rights Reserved4 May 15, 2007 TrueGrid Output Manual For LS-DYNA lsdythmtLS- dyna thermal material offset to numbered entities in the sliding interface to region (part phase)..132si select nodes for the slave side (merge phase)..132siiassign sliding interfaces (part phase)..133sidsliding interface user-defined integration the properties of a set of springs or assigns a face to be half of a set of spring/damper pairs 140springcreate/modify a spring (part phase).

5 141springcreate/modify a numbered weld property a 2007 by XYZ Scientific Applications, Inc. All Rights ReservedTrueGrid Output Manual For LS-DYNA May 15, 20075I. LS-DYNA Output GuideIntroductionLS- dyna is a nonlinear, explicit and implicit, two and three-dimensional finite element code forsolid, structural, and fluid mechanics to simulate dynamic, static, heat transfer, electrostatic, andelectromagnetic problems developed by Livermore Software Technology Company. The focus inthis Manual will be on those features in TrueGrid that are specific to creating a LS-DYNA inputfile.

6 The TrueGrid User Manual covers the creation of a mesh and will not be covered in thismanual. This Manual is incomplete in another way because it cannot be used as a substitute for theLS- dyna Manual . For a full understanding of the use of these features, the user must have aworking knowledge of LS-DYNA and be familiarity with a LS-DYNA User common source of confusion is the notion of a part and a material. A LS-DYNA part is equivalentto a TrueGrid material. In contrast, a TrueGrid material is defined using the lsdymats any group of elements (a region in the part phase of an element set in the merge phase) can beassigned this material.

7 Also in contrast, a TrueGrid part is formed using the block or cylindercommand. A TrueGrid part can contain many different materials or many TrueGrid parts can allbe assigned the same ConventionsDifferent fonts are used through out this Manual to indicate their meaning. A literal is highlightedin bold. A symbol to be substituted with a literal or a number is italicized. A computer example usesthe Courier font. A button in from the Graphical User Interface is both italic and Features in LS-DYNAT here are many features in TrueGrid to create a model for LS-DYNA .

8 The table below shows thecommands that are used for each feature in LS-DYNA . Sometimes there are several commandslisted. For example, shells can be generated using both the block and cylinder commands. The nand th are used to set the properties of these shells. In another example, the si and sii commands areused to identify the faces of the mesh that form the sliding (or contact) surfaces. The associated sidcommand is used to assign properties to the sliding is specifically a three-dimensional mesh generator and preprocessor. A two-dimensionalmesh can be generated in TrueGrid for LS-DYNA by forming a shell mesh where the z-coordinateis set to 0.

9 The easiest way to be sure that the z-coordinates are kept at zero is to project the entireshell mesh onto the plane where z=0 (sd # plan 0 0 0 0 0 1 sfi ;;-1; sd #).Copyright 2007 by XYZ Scientific Applications, Inc. All Rights Reserved6 May 15, 2007 TrueGrid Output Manual For LS-DYNALS- dyna featureTrueGrid commands*ALE_SMOOTHINGsc*BOUNDARY_CONVEC TION_SEGMENTcv, cvi*BOUNDARY_FLUX_SEGMENTfl, fli, arri, dist*BOUNDARY_NON_REFLECTINGnr, nri*BOUNDARY_PRESCRIBED_MOTION_NODEfrb, fv, fvi, fvc, fvci, fvs, fvsi, acc,acci, accc, accci, accs, accsi, fvv,fvvi, fvvc, fvvci, fvvs, fvvsi, vacc,vacci, vaccc, vaccci, vaccs, vaccsi, fd,fdi, fdc, fdci, fds, fdsi.

10 *BOUNDARY_PRESCRIBED_MOTION_RIGID lsdymats*BOUNDARY_RADIATION_SEGMENTrb, rbi*BOUNDARY_SLIDING_PLANE plane, sfb*BOUNDARY_SPC_NODElb, lsys, sfb*BOUNDARY_SPC_SETplane*BOUNDARY_SYMME TRY_FAILURE plane, syf, syfi*BOUNDARY_TEMPERATURE_NODEft, fti*CONSTRAINED_EXTRA_NODES_SETjt, jd*CONSTRAINED_JOINT_SPHERICALjd, jt *CONSTRAINED_JOINT_REVOLUTEjd, jt *CONSTRAINED_JOINT_CYLINDRICALjd, jt *CONSTRAINED_JOINT_PLANARjd, jt *CONSTRAINED_JOINT_UNIVERSALjd, jt *CONSTRAINED_JOINT_TRANSLATIONALjd, jt *CONSTRAINED_NODAL_RIGID_BODY rigid, nset, nseti*CONSTRAINED_NODAL_RIGID_BODY_INERT IA rigid, nset, nseti*CONSTRAINED_NODE_SETjt, jd, mpc, nset, nseti*CONSTRAINED_RIGID_BODIES rigbm*CONSTRAINED_SHELL_TO_SOLID shtoso, shtosoi*CONSTRAINED_SPOTWELD spotweld, spw, spwd, jt, jd*CONSTRAINED_SPOTWELD_FILTERED_FORCE spotweld*CONSTRAINED_TIED_NODES_FAILUREf n, fni*CONTACTsi, sii, sid, orpt*CONTACT_1 Dsid (rebar option)