lsdyna内部培训资料1

Copyright©2003-2011byLIVERMORESOFTWARETECHNOLOGYCORPORATIONContentsp.1AcknowledgementsMajorcontributorstothissetofnotesincludeJohnHallquist,SuriBala,andJimDayofLSTCandLS-DYNA®courseinstructorsJohnReid,UniversityofNebraskaandPaulDubois,LS-DYNA®Consultant.Forsomeofthechapters,specificacknowledgementsaregiveninthechapter.DisclaimerThematerialpresentedinthistextisintendedforillustrativeandeducationalpurposesonly.Itisnotintendedtobeexhaustiveortoapplytoanyparticularengineeringdesignorproblem.LivermoreSoftwareTechnologyCorporationassumesnoliabilityorresponsibilitywhatsoevertoanypersonorcompanyforanydirectorindirectdamagesresultingfromtheuseofanyinformationcontainedherein.Copyright©2003-2011byLIVERMORESOFTWARETECHNOLOGYCORPORATIONContentsp.2PrefaceThesenotesareanintroductiontothenon-linearexplicitFiniteElementprogramLS-DYNA®.ThisisashortIntroductionClassanditisnotatheoreticalclassbutitismorepracticaloriented.FirstageneralintroductiontoLSTCandLS-DYNA®isgivenandexamplesofapplicationsareshown.Thereafter,themostoftenusedoptionsinLS-DYNA®aredescribed,thoughtherearemanyleftoutduetothecomplexityofthesoftware.Throughoutthenotes,referencesaregivenandattheendofthenotesthesearelisted.Itisthehopeoftheauthorthattheattendant/readerwillbeableto:StartLS-DYNA®usingbothWindowsManagerandLinuxShellUnderstandtheconceptbehindexplicitFiniteElementSimulationSelectcontactdefinition,elementformulationaccordingtothemodelChooseamaterialmodelthatfitsthebehavioroftherealmaterialUnderstandsomeofthemoreadvancedoptionsandwheretoapplythemUseLS-PrePost®asapostprocessorFeelcomfortableusingLS-DYNA®explicitKnowhowtojudgeifamodelseemsstableandrealisticDebuginputdecksthatcausesproblemsCopyright©2003-2011byLIVERMORESOFTWARETECHNOLOGYCORPORATIONContentsp.3Contents1.Introduction–LS-DYNA®andLSTC2.ExampleofApplications3.InputDeckFundamentals4.PostprocessingwithLS-PrePost®EX1&25.ContactEX3LiveDemoLiveDemoCopyright©2003-2011byLIVERMORESOFTWARETECHNOLOGYCORPORATIONContentsp.4Contents6.Materials
6.1.Introduction
6.2.PlasticityModelsEX4
6.3.Foams
6.4.Composites
6.5.Geo-materials
6.6.HyperelasticMaterials
6.7.SpecialtyMaterials
6.8.DiscreteBeamMaterialsCopyright©2003-2011byLIVERMORESOFTWARETECHNOLOGYCORPORATIONContentsp.5Contents7.HourglassingEX58.ElementFormulationsEX69.RigidBodiesandJointsEX710.RestartsEX811.TimestepandMass-scaling12.AbnormalTerminationsandAssessmentofResults13.SpotweldsCopyright©2003-2011byLIVERMORESOFTWARETECHNOLOGYCORPORATIONContentsp.6Contents14.StressInitialization(Preloading)EX915.DampingEX1016.MeshAdaptivityandCoarseningEX1117.ComponentAnalysis18.AirbagsCopyright©2003-2011byLIVERMORESOFTWARETECHNOLOGYCORPORATIONContentsp.7Contents19.BriefSummary20.ImplicitSimulationsinLS-DYNA®20.1.ImplicitAlgorithms20.2.ActivatingtheImplicitSolverEX1220.3.ImplicitinLS-DYNA®EX1320.4.Materials/elements20.5.ContactEX1420.6.EigenvaluesEX15&1620.7.BucklingEX1720.8.PracticalGuidelinesCopyright©2003-2011byLIVERMORESOFTWARETECHNOLOGYCORPORATIONContentsp.8Contents21.SomeCrashModelingGuidelines22.AdditionalClasses23.References24.ExercisesIntroductiontoLS-DYNA®/LSTCandsomeofthefeaturesinLS-DYNA®Chapter1Copyright©2003-2011byLIVERMORESOFTWARETECHNOLOGYCORPORATIONIntroductionp.1.1WhatisLS-DYNA®?OriginallydevelopedfornonlinearstressanalysisofstructuressubjectedtoimpactloadingNow,amulti-physicscode…Fluid-structureinteraction(Lagrangian/Euler/ALE)Thermalandcoupledthermal-structuralanalysisImplicitcapabilities(staticanalysis,implicitdynamicanalysis,eigenvalueanalysis,linearanalysis)…withwell-developedparallelprocessingcapabilitySMP(SharedMemoryParallel)MPP(MassivelyParallelProcessing)Copyright©2003-2011byLIVERMORESOFTWARETECHNOLOGYCORPORATIONIntroductionp.1.2SomeApplicationsAutomotiveAirbagsOccupantsafetyAerospaceBirdstrikeBladecontainmentCrashManufacturingStampingForgingCastingStructuralEarthquakesafetyConcretestructuresElectronicsDropanalysisPackagedesignThermalDefenseWeaponsdesignBlastresponsePenetrationCopyright©2003-2011byLIVERMORESOFTWARETECHNOLOGYCORPORATIONIntroductionp.1.3LSTCCompanyBackgroundPublicdomainDYNA3D,Dr.JohnO.Hallquist/LawrenceLivermoreNationalLaboratory,1976WeaponsimulationsLSTCandLS-DYNA3D®foundedbyDr.J.O.Hallquistin1988RecognizedmarketforcommercialapplicationsInthe1990’s…LS-DYNA2DandLS-DYNA3Dcombined(LS-DYNA®)Implicitcapability(LS-NIKE3D)introducedtoLS-DYNA®Thermalcapability(TOPAZ)introducedtoLS-DYNA®IntroducedMPPcapabilityEulerian/ALEelementformulationsandEuler/LagrangecouplingintroducedLS-POST,LS-OPT®introducedCopyright©2003-2011byLIVERMORESOFTWARETECHNOLOGYCORPORATIONIntroductionp.1.4LSTCCompanyBackgroundSince2000,ExpandedMPPcapabilityMeshlessmethodsintroducedLS-POSTexpandedtoincludepreprocessing(LS-PrePost®)Worldwidedistribution:US,UK,Nordiccountries,France,Germany,Italy,Netherlands,Japan,Korea,China,Taiwan,India,Brazil;alsothroughANSYSandMSC.60+full-timeemployees+numerousconsultantsProducts:LS-DYNA®LS-PrePost®LS-OPT®Copyright©2003-2011byLIVERMORESOFTWARETE