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1、ComputationalMaterialsScience138(2017)27–33ContentslistsavailableatScienceDirectComputationalMaterialsSciencejournalhomepage:www.elsevier.com/locate/commatsciStressanddamagedevelopmentinthecarbonizationprocessofmanufacturingcarbon/carboncompositesTiantianYin,YuWang?,LinghuiHe,XinglongGon
2、g?CASKeyLaboratoryofMechanicalBehaviorandDesignofMaterials,DepartmentofModernMechanics,UniversityofScienceandTechnologyofChina,Hefei230027,ChinaarticleinfoabstractArticlehistory:Carbon/carboncompositesarewidelyusedinaerospaceindustryduetotheirexcellentmechanicalandReceived4May2017thermal
3、propertiesinhightemperature.However,understandingofthemechanismfordefectsinducedReceivedinrevisedform12June2017inthecarbonizationprocessofcarbon/carboncompositesisstillinadequate.Inthispaper,amodelisAccepted13June2017establishedtoobtainthematrixpropertiesandsimulatethestressanddamageevol
4、utionduringthecar-bonizationprocessofcarbon/carboncomposites.First,thephaseevolutionequationsareusedtogainthevolumefractionsofphases,andthentheelasticmodulusandPoissonratioareobtainedbyanestedKeywords:homogenizationmethod.Then,thethermaldeformationincludingthecompetitionbetweenthermalCar
5、bonizationprocessexpansionandchemicalshrinkageisdiscussed.ThedamageevolutioninthematrixisincorporatedChemicalshrinkageCarbon/carboncompositesthroughtheprogressivedamagemodel.Finally,weperformthe?niteelementsimulationforthecar-Damageevolutionbonizationoftheunidirectional?berbundlereinforc
6、edcarbon/carboncomposites.Theresultsshowthatmatrixsustainscompressioncircumferentialstressbeforereactionstart.Afterreactionactivates,thecir-cumferentialstressturnstotensionduetothematrixshrinkage,andthetensionstressincreasesrapidlytocausedamage.Thedamageevolvesalongthe?ber/matrixinterfac
7、ewiththetemperatureincreasing.Withdamageaccumulation,microcracksmaygeneratealongthe?ber/matrixinterface,whichissimilarastheliteraturereported.ó2017ElsevierB.V.Allrightsreserved.1.Introductionplex,whichinvolvesmanycoupledmechanisms,bothmechani-callyandchemically.Variouseve
