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【英文标准名称】:StandardTestMethodforTension-TensionFatigueofPolymerMatrixCompositeMaterials
【原文标准名称】:拉伸的标准试验方法.聚合物基体复合材料的拉伸疲劳
【标准号】:ASTMD3479/D3479M-1996(2007)
【标准状态】:现行
【国别】:
【发布日期】:1996
【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】:D30.04
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:compositematerials;fatigue;polymermatrixcomposites;properties
【摘要】:Thistestmethodisdesignedtoyieldtensilefatiguedataformaterialspecifications,researchanddevelopment,qualityassurance,andstructuraldesignandanalysis.Theprimarytestresultisthefatiguelifeofthetestspecimenunderaspecificloadingandenvironmentalcondition.Replicatetestsmaybeusedtoobtainadistributionoffatiguelifeforspecificmaterialtypes,laminatestackingsequences,environments,andloadingconditions.Guidanceinstatisticalanalysisoffatiguelifedata,suchasdeterminationoflinearizedstresslife(S-N)orstrain-life(x03B5;-N)curves,canbefoundinPracticeE739.Thistestmethodcanbeutilizedinthestudyoffatiguedamageinapolymermatrixcompositesuchastheoccurrenceofmicroscopiccracks,fiberfractures,ordelaminations.3Thespecimenrsquo;residualstrengthorstiffness,orboth,maychangeduetothesedamagemechanisms.Thelossinstiffnessmaybequantifiedbydiscontinuingcyclicloadingatselectedcycleintervalstoobtainthequasi-staticaxialstress-straincurveusingmodulusdeterminationproceduresfoundinTestMethodD3039/D3039M.ThelossinstrengthassociatedwithfatiguedamagemaybedeterminedbydiscontinuingcyclicloadingtoobtainthestaticstrengthusingTestMethodD3039/D3039M.Note18212;Thistestmethodmaybeusedasaguidetoconducttension-tensionvariableamplitudeloading.Thisinformationcanbeusefulintheunderstandingoffatiguebehaviorofcompositestructuresunderspectrumloadingconditions,butisnotcoveredinthistestmethod..1.1Thistestmethoddeterminesthefatiguebehaviorofpolymermatrixcompositematerialssubjectedtotensilecyclicloading.Thecompositematerialformsarelimitedtocontinuous-fiberordiscontinuous-fiberreinforcedcompositesforwhichtheelasticpropertiesarespeciallyorthotropicwithrespecttothetestdirection.Thistestmethodislimitedtounnotchedtestspecimenssubjectedtoconstantamplitudeuniaxialin-planeloadingwheretheloadingisdefinedintermsofatestcontrolparameter.1.2Thistestmethodpresentstwoprocedureswhereeachdefinesadifferenttestcontrolparameter.1.2.1ProcedureA-Asysteminwhichthetestcontrolparameteristheload(stress)andthemachineiscontrolledsothatthetestspecimenissubjectedtorepetitiveconstantamplitudeloadcycles.Inthisprocedure,thetestcontrolparametermaybedescribedusingeitherengineeringstressorappliedloadasaconstantamplitudefatiguevariable.1.2.2ProcedureB-Asysteminwhichthetestcontrolparameteristhestrainintheloadingdirectionandthemachineiscontrolledsothatthetestspecimenissubjectedtorepetitiveconstantamplitudestraincycles.Inthisprocedure,thetestcontrolparametermaybedescribedusingengineeringstrainintheloadingdirectionasaconstantamplitudefatiguevariable.1.3ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Withinthetexttheinch-poundunitsareshowninbrackets.Thevaluesstatedineachsystemarenotexactequivalents;therefore,eachsystemmustbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththisstandard.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:
【国际标准分类号】:83_140_20
【页数】:6P.;A4
【正文语种】: