【英文标准名称】:StandardTestMethodforMonotonicTensileBehaviorofContinuousFiber-ReinforcedAdvancedCeramicswithSolidRectangularCross-SectionTestSpecimensatAmbientTemperature
【原文标准名称】:室温下用实心矩形截面试样进行连续纤维增强高级陶瓷恒定抗拉性能的标准试验方法
【标准号】:ASTMC1275-2010
【标准状态】:现行
【国别】:
【发布日期】:2010
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:C28.07
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:陶瓷基体混合
【英文主题词】:ceramicmatrixcomposite
【摘要】:Thistestmethodmaybeusedformaterialdevelopment,materialcomparison,qualityassurance,characterization,anddesigndatageneration.Continuousfiber-reinforcedceramicmatrixcompositesgenerallycharacterizedbyfinegrainsized(x003C;50x03BC;m)matricesandceramicfiberreinforcementsarecandidatematerialsforstructuralapplicationsrequiringhighdegreesofwearandcorrosionresistance,andhigh-temperatureinherentdamagetolerance(thatis,toughness).Inaddition,continuousfiber-reinforcedglass(amorphous)matrixcompositesarecandidatematerialsforsimilarbutpossiblyless-demandingapplications.Althoughflexuraltestmethodsarecommonlyusedtoevaluatestrengthsofmonolithicadvancedceramics,thenon-uniformstressdistributionoftheflexurespecimeninadditiontodissimilarmechanicalbehaviorintensionandcompressionforCFCCsleadtoambiguityofinterpretationofstrengthresultsobtainedfromflexuretestsforCFCCs.Uniaxial-loadedtensilestrengthtestsprovideinformationonmechanicalbehaviorandstrengthforauniformly-stressedmaterial.Unlikemonolithicadvancedceramicswhichfracturecatastrophicallyfromasingledominantflaw,CFCCsgenerallyexperiencex201C;gracefulx201D;fracturefromacumulativedamageprocess.Therefore,thevolumeofmaterialsubjectedtoauniformtensilestressforasingleuniaxially-loadedtensiletestmaynotbeassignificantafactorindeterminingtheultimatestrengthsofCFCCs.However,theneedtotestastatisticallysignificantnumberoftensiletestspecimensisnotobviated.Therefore,becauseoftheprobabilisticnatureofthestrengthdistributionsofthebrittlematricesofCFCCs,asufficientnumberoftestspecimensateachtestingconditionisrequiredforstatisticalanalysisanddesign.StudiestodeterminetheexactinfluenceoftestspecimenvolumeonstrengthdistributionsforCFCCshavenotbeencompleted.Itshouldbenotedthattensilestrengthsobtainedusingdifferentrecommendedtensilespecimenswithdifferentvolumesofmaterialinthegagesectionsmaybedifferentduetothesevolumedifferences.Tensiletestsprovideinformationonthestrengthanddeformationofmaterialsunderuniaxialtensilestresses.Uniformstressstatesarerequiredtoeffectivelyevaluateanynon-linearstress-strainbehaviorwhichmaydevelopastheresultofcumulativedamageprocesses(forexample,matrixcracking,matrix/fiberdebonding,fiberfracture,delamination,etc.)whichmaybeinfluencedbytestingmode,testingrate,processingoralloyingeffects,orenvironmentalinfluences.Someoftheseeffectsmaybeconsequencesofstresscorrosionorsubcritical(slow)crackgrowththatcanbeminimizedbytestingatsufficientlyrapidratesasoutlinedinthistestmethod.Theresultsoftensiletestsoftestspecimensfabricatedtostandardizeddimensionsfromaparticularmaterialorselectedportionsofapart,orboth,maynottotallyrepresentthestrengthanddeformationpropertiesoftheentire,full-sizeendproductoritsin-servicebehaviorindifferentenvironments.Forqualitycontrolpurposes,resultsderivedfromstandardizedtensiletestspecimensmaybeconsideredindicativeoftheresponseofthematerialfromwhichtheyweretakenfor,givenprimaryprocessingconditionsandpost-processingheattreatments.ThetensilebehaviorandstrengthofaCFCCaredependentonitsinherentresistancetofracture,thepresenceofflaws,ordamageaccumulationprocesses,orboth.Analysisoffracturesurfacesandfractography,thoughbeyondthescopeofthistestmethod,ishighlyrecommended.1.1Thistestmethodcoversthedeterminationoftensilebehaviorincluding......
【中国标准分类号】:
【国际标准分类号】:81_060_99
【页数】:21P.;A4
【正文语种】: