ASTM D695-2002a 硬质塑料抗压特性的标准试验方法

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【英文标准名称】:StandardTestMethodforCompressivePropertiesofRigidPlastics
【原文标准名称】:硬质塑料抗压特性的标准试验方法
【标准号】:ASTMD695-2002a
【标准状态】:现行
【国别】:
【发布日期】:2002
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:D20.10
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:试验;抗压强度;塑料
【英文主题词】:compressiveproperties;compressivestrength;modulusofelasticity;plastics;
【摘要】:Compressiontestsprovideinformationaboutthecompressivepropertiesofplasticswhenemployedunderconditionsapproximatingthoseunderwhichthetestsaremade.Compressivepropertiesincludemodulusofelasticity,yieldstress,deformationbeyondyieldpoint,andcompressivestrength(unlessthematerialmerelyflattensbutdoesnotfracture).Materialspossessingaloworderofductilitymaynotexhibitayieldpoint.Inthecaseofamaterialthatfailsincompressionbyashatteringfracture,thecompressivestrengthhasaverydefinitevalue.Inthecaseofamaterialthatdoesnotfailincompressionbyashatteringfracture,thecompressivestrengthisanarbitraryonedependinguponthedegreeofdistortionthatisregardedasindicatingcompletefailureofthematerial.Manyplasticmaterialswillcontinuetodeformincompressionuntilaflatdiskisproduced,thecompressivestress(nominal)risingsteadilyintheprocess,withoutanywell-definedfractureoccurring.Compressivestrengthcanhavenorealmeaninginsuchcases.Compressiontestsprovideastandardmethodofobtainingdataforresearchanddevelopment,qualitycontrol,acceptanceorrejectionunderspecifications,andspecialpurposes.Thetestscannotbeconsideredsignificantforengineeringdesigninapplicationsdifferingwidelyfromtheload-timescaleofthestandardtest.Suchapplicationsrequireadditionaltestssuchasimpact,creep,andfatigue.Beforeproceedingwiththistestmethod,referenceshouldbemadetotheASTMspecificationforthematerialbeingtested.Anytestspecimenpreparation,conditioning,dimensions,andtestingparameterscoveredinthematerialsspecificationshalltakeprecedenceoverthosementionedinthistestmethod.Ifthereisnomaterialspecification,thenthedefaultconditionsapply.Table1inClassificationD4000liststheASTMmaterialsstandardsthatcurrentlyexist.1.1Thistestmethodcoversthedeterminationofthemechanicalpropertiesofunreinforcedandreinforcedrigidplastics,includinghigh-moduluscomposites,whenloadedincompressionatrelativelylowuniformratesofstrainingorloading.Testspecimensofstandardshapeareemployed.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesinparenthesesareforinformationonly.Note18212;Forcompressivepropertiesofresin-matrixcompositesreinforcedwithorientedcontinuous,discontinuous,orcross-plyreinforcements,testsmaybemadeinaccordancewithTestMethodD3410.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.AspecificprecautionarystatementisgiveninNote11.Note28212;ThistestmethodistechnicallyequivalenttoISO604.
【中国标准分类号】:G31
【国际标准分类号】:83_080_01
【页数】:8P.;A4
【正文语种】: