細觀力學有限元法預測微米短纖維復合材料的有效彈性性能.pdf

1、中北大學碩士學位論文細觀力學有限元法預測微米短纖維復合材料的有效彈性性能姓名：王連生申請學位級別：碩士專業(yè)：機械制造及其自動化指導教師：王愛玲20090522MicromechanicsFEMpredicteffectiveelasticmodulusofmicroshortfiberreinforcedcompositesABSTRACTThemechanicalpropertiesofmicro—shortfiberreinforc

2、edresinmatrixcompositeswillbeimprovedonlywithsmallvolumefraction(30／曠5％)reinforcedmaterialsbecausespecialpropertyofmicroshortfiberandthis虹ndofcompositeisstudyingandapplyingwidelytheseyearsInthepresentthesis，effectiveelas

3、ticmoduluspredictionofmicro—shortfiberreinforcedcompositeshasbeenstudiedAtfirst，somemicromechanicsfoundationtheoriesandmethodsforeffectiveelasticmoduluspredictionareintroducedAndthenMori—TanakaEquivalentInclusionTheoryan

4、dwhichtheoryconsideredinterfacedescribedInclusionmustbeellipsoidalwhentheClassicalMori—Tanakamethodisused，SOthisthesisputforwardanewmethodwhichisMoriTanakamethodcombinedwithFiniteElementMethod，andthenewmethodissuitablefo

5、rarbitraryshapeinclusionThecalculationmethodandFEMmodelwasexpressedinordertocalculateeffectiveelasticmodulusofcompositesbyMori—TanakaFEMmethodUsingMori—TanakaFEMmethodand2Dfiniteelementmodelthefollowingcontentswerebeensy

6、stematicallyinvestigated：(1)Attheassumptionofgoodinterfacialbondingofcomposite，withoutconsideringplasticdeformationandresidualthermalstress，theinfluencelawofcompositesstress／strainandeffectiveelasticmoduluswithmicro—shor

7、tfiberpropertieshasbeeninvestigated，whichpropertiesincludeaspectratio，volumefraction，singleorientationandrandomorientationofmicroshortfibers(2)Buildingtheinterfacemodelandconsideringelasticmodulusofinterfaceasvariable，th