ASTM C1499-2009 室温下高级陶瓷单调等边柔性强度试验方法

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【英文标准名称】:StandardTestMethodforMonotonicEquibiaxialFlexuralStrengthofAdvancedCeramicsatAmbientTemperature
【原文标准名称】:室温下高级陶瓷单调等边柔性强度试验方法
【标准号】:ASTMC1499-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【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】:C28.01
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:advancedceramic;biaxial;concentricring;equibiaxial;plate;strength;Advancedceramics;Ambienttemperature;Concentricringconfigurations;Engineeringapplications;Equibiaxialflexuralstrength;Monotonicuniaxialloading
【摘要】:Thistestmethodmaybeusedformaterialdevelopment,materialcomparison,qualityassurance,characterizationanddesigncodeormodelverification.Engineeringapplicationsofceramicsfrequentlyinvolvebiaxialtensilestresses.Generally,theresistancetoequibiaxialflexureisthemeasureoftheleastflexuralstrengthofamonolithicadvancedceramic.Theequibiaxialflexuralstrengthdistributionsofceramicsareprobabilisticandcanbedescribedbyaweakestlinkfailuretheory,(1,2).Therefore,asufficientnumberoftestspecimensateachtestingconditionisrequiredforstatisticalestimationor''theequibiaxialstrength.Equibiaxialstrengthtestsprovideinformationonthestrengthanddeformationofmaterialsundermultipletensilestresses.Multiaxialstressstatesarerequiredtoeffectivelyevaluatefailuretheoriesapplicabletocomponentdesign,andtoefficientlysamplesurfacesthatmayexhibitanisotropicflawdistributions.Equibiaxialtestsalsominimizetheeffectsoftestspecimenedgepreparationascomparedtouniaxialtestsbecausethegeneratedstressesarelowestatthetestspecimenedges.Thetestresultsofequibiaxialtestspecimensfabricatedtostandardizeddimensionsfromaparticularmaterialand/orselectedportionsofacomponentmaynottotallyrepresentthestrengthpropertiesintheentire,full-sizecomponentoritsin-servicebehaviorindifferentenvironments.Forqualitycontrolpurposes,resultsderivedfromstandardizedequibiaxialtestspecimensmaybeconsideredindicativeoftheresponseofthebulkmaterialfromwhichtheyweretakenforanygivenprimaryprocessingconditionsandpost-processingheattreatmentsorexposures.1.1Thistestmethodcoversthedeterminationoftheequibiaxialstrengthofadvancedceramicsatambienttemperatureviaconcentricringconfigurationsundermonotonicuniaxialloading.Inaddition,testspecimenfabricationmethods,testingmodes,testingrates,allowabledeflection,anddatacollectionandreportingproceduresareaddressed.Twotypesoftestspecimensareconsidered:machinedtestspecimensandas-firedtestspecimensexhibitingalimiteddegreeofwarpage.Strengthasusedinthistestmethodreferstothemaximumstrengthobtainedundermonotonicapplicationofload.Monotonicloadingreferstoatestconductedataconstantrateinacontinuousfashion,withnoreversalsfromtestinitiationtofinalfracture.1.2Thistestmethodisintendedprimarilyforusewithadvancedceramicsthatmacroscopicallyexhibitisotropic,homogeneous,continuousbehavior.Whilethistestmethodisintendedforuseonmonolithicadvancedceramics,certainwhisker-orparticle-reinforcedcompositeceramicsaswellascertaindiscontinuousfiber-reinforcedcompositeceramicsmayalsomeetthesemacroscopicbehaviorassumptions.Generally,continuousfiberceramiccompositesdonotmacroscopicallyexhibitisotropic,homogeneous,continuousbehavior,andtheapplicationofthistestmethodtothesematerialsisnotrecommended.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Q32
【国际标准分类号】:81_060_30
【页数】:13P.;A4
【正文语种】:英语