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1、WS-1WORKSHOPDefineaCompositeMaterialNAS121,Workshop,May6,2002ProblemDescriptionA1in.x1in.compositeplateisloadedwith2000#/in.intheYdirectiononthetopedge,1000#/in.inboththeXdirectionandYdirectionontherighthandsideedge.TheleftsidereactstheloadswithX,Y,Z,andRyconstraints.ProblemDe
2、scriptionThelayupismadeofgraphite/epoxytapeandisshowntotheright.Theanglesshownarerelativetotheglobalaxisshown.Thus,the0degreeply1hasit’sfiberscomingoutofthepageintheYdirection.NotethatwhilethepositivesenseoftheanglesarerighthandrulearoundtheZglobalaxisinthislayupdefinition,int
3、heNastrandefinition,itisaroundtheZelementaxisandthusdependentontheelementGRIDorder.ProblemDescription(cont.)Thecompositepliesaregraphite/epoxytapewithathicknessof0.0054in.Theelasticandstrengthpropertiesareshownontheright.ThefailuretheoremtobeusedisHill.E1120e6E222e6U12.35G121e
4、6G131e6G231e6Xt120ksiXc110ksiYt13ksiYc16ksiS14ksiSb5ksiSuggestedExerciseStepsCreateageometrymodel.Usemeshseedstodefinethemeshdensity.Createafiniteelementmesh.Applyboundaryconditionstothemodel.Applyloadstothemodel.Defineplymaterialproperties.CheckelementnormalsDefinecompositema
5、terialproperties.DefineamaterialcoordinatesystemApplythematerialcoordinatesystemtotheelements.SubmitthemodeltoMSC.Nastranforanalysis.AttachxdbResultsFileDisplayplystressesusingMSC.Patran.ViewplyfailureindicesinMSC.NastranChangelayuptomakefailureindicesbelow1.0.Analyzethemodelw
6、iththenewcompositelayupViewthechangedplyfailureindicesCREATENEWDATABASECreateanewdatabasecalledcomposite1.db:InFileselectNewEntercomposite1asthefilenameClickOKChooseDefaultToleranceSelectMSC.NastranastheAnalysisCodeSelectStructuralastheAnalysisTypeClickOKabcdefgStep1.Createage
7、ometrymodelInGeometrycreatethefirstcurve.SelectCreate/Surface/VertexOntheSurfaceVertex“n”Listsenter[000],[100],[110],[010]ClickApplyClicktheShowLabeliconabcdStep2.UsemeshseedstodefinethemeshdensityInElements,createmeshseeds.SelectCreate/MeshSeed/UniformClickonthetopedgeofthepl
8、atetocreateameshseedThenclickontherightedgeabcStep3.Createafi
