【英文标准名称】:StandardTestMethodforTensilePropertiesofThinPlasticSheeting
【原文标准名称】:塑料薄板材抗拉特性的标准试验方法
【标准号】:ASTMD882-2002
【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(US-ASTM)
【起草单位】:D20.19
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:试验;塑料
【英文主题词】:modulusofelasticity;plasticfilm;plasticsheeting;tensileproperties;tensilestrength;toughness;yieldstress
【摘要】:Tensilepropertiesdeterminedbythistestmethodareofvaluefortheidentificationandcharacterizationofmaterialsforcontrolandspecificationpurposes.Tensilepropertiesmayvarywithspecimenthickness,methodofpreparation,speedoftesting,typeofgripsused,andmannerofmeasuringextension.Consequently,whereprecisecomparativeresultsaredesired,thesefactorsmustbecarefullycontrolled.Thistestmethodshallbeusedforrefereepurposes,unlessotherwiseindicatedinparticularmaterialspecifications.Formanymaterials,theremaybeaspecificationthatrequirestheuseofthistestmethod,butwithsomeproceduralmodificationsthattakeprecedencewhenadheringtothespecification.Therefore,itisadvisabletorefertothatmaterialspecificationbeforeusingthistestmethod.Table1inClassificationD4000liststheASTMmaterialsstandardsthatcurrentlyexist.Tensilepropertiesmaybeutilizedtoprovidedataforresearchanddevelopmentandengineeringdesignaswellasqualitycontrolandspecification.However,datafromsuchtestscannotbeconsideredsignificantforapplicationsdifferingwidelyfromtheload-timescaleofthetestemployed.Thetensilemodulusofelasticityisanindexofthestiffnessofthinplasticsheeting.Thereproducibilityoftestresultsisgoodwhenprecisecontrolismaintainedoveralltestconditions.Whendifferentmaterialsarebeingcomparedforstiffness,specimensofidenticaldimensionsmustbeemployed.Thetensileenergytobreak(TEB)isthetotalenergyabsorbedperunitvolumeofthespecimenuptothepointofrupture.Insometextsthispropertyhasbeenreferredtoastoughness.Itisusedtoevaluatematerialsthatmaybesubjectedtoheavyabuseorthatmightstallwebtransportequipmentintheeventofamachinemalfunctioninend-useapplications.However,therateofstrain,specimenparameters,andespeciallyflawsmaycauselargevariationsintheresults.Inthatsense,cautionisadvisedinutilizingTEBtestresultsforend-usedesignapplications.Materialsthatfailbytearinggiveanomalousdatawhichcannotbecomparedwiththosefromnormalfailure.1.1Thistestmethodcoversthedeterminationoftensilepropertiesofplasticsintheformofthinsheeting,includingfilm(lessthan1.0mm(0.04in.)inthickness).Note18212;Filmhasbeenarbitrarilydefinedassheetinghavingnominalthicknessnotgreaterthan0.25mm(0.010in.).Note28212;Tensilepropertiesofplastics1.0mm(0.04in.)orgreaterinthicknessshallbedeterminedaccordingtoTestMethodD638.1.2Thistestmethodmaybeusedtotestallplasticswithinthethicknessrangedescribedandthecapacityofthemachineemployed.1.2.1StaticWeighing,Constant-Rate-of-GripSeparationTest8212;Thistestmethodemploysaconstantrateofseparationofthegripsholdingtheendsofthetestspecimen.1.3Specimenextensionmaybemeasuredinthesetestmethodsbygripseparation,extensionindicators,ordisplacementofgagemarks.1.4Aprocedurefordeterminingthetensilemodulusofelasticityisincludedatonestrainrate.Note38212;Themodulusdeterminationisgenerallybasedontheuseofgripseparationasameasureofextension;however,thedesirabilityofusingextensometers,asdescribedin5.2,isrecognizedandprovisionfortheuseofsuchinstrumentationisincorporatedintheprocedure.1.5Testdataobtainedbythistestmethodisrelevantandappropriateforuseinengineeringdesign.1.6ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesinparenthesesareprovidedforinformationonly.1.7Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsus......
【中国标准分类号】:G33
【国际标准分类号】:83_140_10
【页数】:9P.;A4
【正文语种】: