patran复合材料建模实例prob1c

1、MSC/NASTRAN113ExerciseWorkbook1c- #MSC/NASTRAN113ExerciseWorkbook1c- WORKSHOPPROBLEM1cUniaxialLoadingofaLaminarCompositePlate(PartIII)Objectives:ZY45oFIBERDIRECTIONXsSpecifystackingsequenceoflamina.sCreateaMSC/NASTRANinputfiledirectlyorbyusingMSC/PATRAN.sRuntheanalysisusingMSC/NASTRAN.sReviewresults

2、.WORKSHOP1cUniaxialLoading-PartIII1c- #MSC/NASTRAN113ExerciseWorkbookMSC/NASTRAN113ExerciseWorkbook1c- #WORKSHOP1cUniaxialLoading-PartIII1c- #MSC/NASTRAN113ExerciseWorkbookMSC/NASTRAN113ExerciseWorkbook1c- 1c-2MSC/NASTRAN113ExerciseWorkbookUNBALANCEDZYFIBERDIRECTION5oXAbalancedlayupiswherethereisane

3、qualnumberofpositiveangledpliesasnegativeangledplies.Ascanbeseenintheabovefigure,thislayupisunbalancedbecausethereisonlyapositiveangledply,andnonegativeangledones.TheplyorientationangleistheanglefromXm(x-axisofthematerialcoordinatesystem)tothe1directionoftheplycoordinatesystem(plyfiberdirection).Ino

4、rdertoproperlymodelthefiberdirectionshownintheabovefigure,thepropersignoftheplyorientationanglemustbedetermined.TheNastrandefinitionofthepositiveplyorientationistheangulardirectiongoingfromtheXmtotheYm,orinotherwords,arotationaroundZmthatfollowsthe“righthandrule”.Pic5band6bshowsXmandZmrespectively,t

5、hus,theproperplyorientationangleis-45degrees.WORKSHOP1cUniaxialLoading-PartIII1c- MSC/NASTRAN113ExerciseWorkbookMSC/NASTRAN113ExerciseWorkbook1c- #WORKSHOP1cUniaxialLoading-PartIII1c- #MSC/NASTRAN113ExerciseWorkbookMSC/NASTRAN113ExerciseWorkbook1c- Submitthemodelforalinearstaticanalysis.andClickonth

6、eAnalysisradiobuttonontheTopMenuBarcompletetheentriesasshownherexAnalysisAction:AnalyzeObject:Method:EntireModelAnalysisDeckJobName:prob1cApplyAnMSC/NASTRANinputfilecalledprob1c.bdfwillbegenerated.ThisprocessoftranslatingyourmodelintoaninputfileiscalledtheForwardTranslation.TheForwardTranslationisco

7、mpletewhentheHeartbeatturnsgreen.MSC/PATRANUsersshouldproceedtoStep13.WORKSHOP1cUniaxialLoading-PartIII1c- MSC/NASTRAN113ExerciseWorkbookMSC/NASTRAN113ExerciseWorkbook1c- #GeneratinganinputfileforMSC/NASTRANUsers:MSC/NASTRANuserscangenerateaninputfileusingthedatafrom1-3.Theresultshouldbesimilartothe

8、outputbelow(prob1c.dat):ASSIGNOUTPUT2=prob1c.op2,UNIT=12IDSEMINAR,PROB1CSOL101TIME5CENDTITLE=PROB1CDISP=ALLSTRESS=ALLFORCE=ALLSTRAIN=ALLSPCFORCE=ALLSPC=1LOAD=1BEGINBULKPARAM,POST,-1PARAM,PATVER,3.PARAM,AUTOSPC,YESGRID,1,0.,0.,0.GRID,2,.5,0.,0.GRID,3,1.,0.,0.GRID,4,0.,.5,0.GRID,5,.5,.5,0.GRID,6,1.,.5

9、,0.GRID,7,0.,1.,0.GRID,8,.5,1.,0.GRID,9,1.,1.,0.CQUAD4,1,1,1,2,5,4CQUAD4,2,1,2,3,6,5CQUAD4,3,1,4,5,8,7CQUAD4,4,1,5,6,9,8PCOMP,1+,1,.0054,45.,YESMAT8,1,2.+7,2.+6,.35,1.+6SPC1,1,123,1SPC1,1,13,7SPC1,1,1,4SPC1,1,3,3FORCE,1,3,0,7.5,1.,0.,0.FORCE,1,9,0,7.5,1.,0.,0.FORCE,1,6,0,15.,1.,0.,0.ENDDATASUBMITTIN

10、GTHEINPUTFILEFORMSC/NASTRANandMSC/PATRANUSERS:SubmittheinputfiletoMSC/NASTRANforanalysis.3a.TosubmittheMSC/PATRAN.bdffile,findanavailableUNIXshellwindow.Atthecommandpromptenternastranprob1c.bdfscr=yes.MonitortherunusingtheUNIXpscommand.WORKSHOP1cUniaxialLoading-PartIII1c- #MSC/NASTRAN113ExerciseWork

11、bookMSC/NASTRAN113ExerciseWorkbook1c- 4.MSC/NASTRANUsershavefinishedthisexercise.MSC/PATRANUsersshouldproceedtothenextstep.5.ProceedwiththeReverseTranslationprocess,thatis,importingtheprob1c.op2resultsfileintoMSC/PATRAN.Todothis,returntotheAnalysisformandproceedasfollows:xAnalysisAction:ReadOutput2O

12、bject:ResultEntitiesMethod:TranslateSelectResultsFile.SelectedResultsFileprob1c.op2ApplyBeforepostprocessingtheresults,cleartheLBCmarkersfromthescreenbyselectingthefollowingmainmenuicon:IIResetGraphics6.WhenthetranslationiscompleteandtheHeartbeatturnsgreen,bringuptheResultsform.WORKSHOP1cUniaxialLoa

13、ding-PartIII1c- #MSC/NASTRAN113ExerciseWorkbookMSC/NASTRAN113ExerciseWorkbook1c- #WORKSHOP1cUniaxialLoading-PartIII1c- #MSC/NASTRAN113ExerciseWorkbookMSC/NASTRAN113ExerciseWorkbook1c- #xResultsFormType:SelectResultCases:SelectFringeResult:ResultQuantity:SelectDeformationResult:ApplyBasicDefault,Stat

14、icSubcaseDisplacements,TranslationalXComponentDisplacements,TranslationalWORKSHOP1cUniaxialLoading-PartIII1c- MSC/NASTRAN113ExerciseWorkbookMSC/NASTRAN113ExerciseWorkbook1c- #WORKSHOP1cUniaxialLoading-PartIII1c- #MSC/NASTRAN113ExerciseWorkbookMSC/NASTRAN113ExerciseWorkbook1c- #Figure1c-6:Fringeploto

15、fXDisplacementWORKSHOP1cUniaxialLoading-PartIII1c- #MSC/NASTRAN113ExerciseWorkbookMSC/NASTRAN113ExerciseWorkbook1c- #WORKSHOP1cUniaxialLoading-PartIII1c- #MSC/NASTRAN113ExerciseWorkbookMSC/NASTRAN113ExerciseWorkbook1c- Itshouldbenosurprisethatthemodelhasnox-displacementontheleftedge,andthegreateston

16、theright;afterall;theLBCsfixedtheleftedge.However,youcanseefromthedeformationthat,despitethepurelyx-directionalloading,thereisdefinitey-directionaldeformation.Createafringeplotoftheydeformationinthemodel.ResultQuantity:ApplyYComponentFigure1c-7:FringeplotofYDisplacementThe45degreeorientationofthemod

17、elisresponsibleforthesheardisplacementseeninFigure10b.Thesecondarydirectionofthematerialfeelsthesameloadingastheprimarydirectionofthemodel,0.707timestheappliedload.Thissecondarydirection,however,hasamodulus10timeslessthanthatoftheprimarydirection,andthereforeyieldsmucheasier.Noticethatthedeformation

18、tendstowards-45degrees,thesameorientationasthesecondarydirection.Ifyouwish,youmayviewthez-displacementofthemodel.Youwillfind,however,thatthereisnonebecausethelaminateissymmetricwithrespecttoitscenterline.QuitMSC/PATRANwhenyouhavecompletedthisexercise.WORKSHOP1cUniaxialLoading-PartIII1c- MSC/NASTRAN113ExerciseWorkbookMSC/NASTRAN113ExerciseWorkbook1c- #Figure1a-6:Materialorientationangleshown.1.0001.000ZXY1.0001.000F