細(xì)觀力學(xué)有限元法預(yù)測微米短纖維復(fù)合材料的有效彈性性能.pdf

1、中北大學(xué)碩士學(xué)位論文細(xì)觀力學(xué)有限元法預(yù)測微米短纖維復(fù)合材料的有效彈性性能姓名：王連生申請學(xué)位級別：碩士專業(yè)：機(jī)械制造及其自動(dòng)化指導(dǎo)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