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【英文标准名称】:StandardTestMethodforTensilePropertiesofReinforcedThermosettingPlasticsUsingStraight-SidedSpecimens
【原文标准名称】:用直边样品对热固性塑料的拉伸特性的标准试验方法
【标准号】:ASTMD5083-2010
【标准状态】:现行
【国别】:美国
【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】:D20.10
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:Crosssectiondata/analysis;Reinforcedthermosettingplastics(RTP);Tensileproperties/testing--plastics
【摘要】:Thistestmethodisintendedfortensiletestingoffiber-reinforcedthermosettinglaminates.Forinjectionmoldedthermoplastics,bothreinforcedandunreinforced,TestMethodsD638isrecommended.Formostunidirectionalfiberreinforcedlaminates,TestMethodsD3039/D3039Mispreferred.Thistestmethodisdesignedtoproducetensilepropertydataforqualitycontrolandresearchanddevelopment.Factorsthatinfluencethetensileproperties,andshouldthereforebereported,are:material,methodsofmaterialandspecimenpreparation,specimenconditioning,testenvironment,speedoftesting,voidcontent,andvolumepercentreinforcement.Itisrealizedthatamaterialcannotbetestedwithoutalsospecifyingthemethodofpreparationofthatmaterial.Hence,whencomparativetestsofmaterialspersearedesired,thegreatestcaremustbeexercisedtoensurethatallsamplesarepreparedinexactlythesameway,unlessthetestistoincludetheeffectsofsamplepreparation.Similarly,forrefereepurposesorcomparisonswithinanygivenseriesofspecimen,caremustbetakentosecurethemaximumdegreeofuniformityindetailsofpreparation,treatment,andhandling.Note68212;PreparationtechniquesforreinforcedthermosettingplasticscanbefoundinthepartofISO1268appropriatetothemanufacturingtechniqueforthelaminate.Tensilepropertiesmayprovideusefuldataforengineeringdesignpurposes.However,becauseofthehighdegreeofsensitivityexhibitedbymanyreinforcedplasticstorateofstrainingandenvironmentalconditions,dataobtainedbythistestmethodcannotbeconsideredvalidforapplicationsinvolvingload-timescalesorenvironmentswidelydifferentfromthoseofthistestmethod.Incasesofsuchdissimilarity,noreliableestimationofthelimitofusefulnesscanbemadeformostplastics.Thissensitivitytorateofstrainingandenvironmentnecessitatestestingoverabroadload-timescale(includingimpactandcreep)andrangeofenvironmentalconditions.Note78212;Sincetheexistenceofatrueelasticlimitinplastics(asinmanyotherorganicmaterialsandinmanymetals)isdebatable,theproprietyofapplyingthetermx201C;elasticmodulusx201D;initsquotedgenerallyaccepteddefinitiontodescribethex201C;stiffnessx201D;orstress-straincharacteristicsofplasticmaterialsishighlydependentonsuchfactorsasrateofapplicationofstress,temperature,previoushistoryofspecimen,etc.However,stress-straincurvesforplastics,determinedasdescribedinthistestmethod,almostalwaysshowalinearregionatlowstresses.Astraightlinedrawntangenttothisportionofthecurvepermitscalculationofanelasticmodulusoftheusuallydefinedtype.Suchaconstantisusefulifitsarbitrarynatureanddependenceontime,temperature,andsimilarfactorsarerealized.Formanymaterials,theremaybeaspecificationthatrequirestheuseofthistestmethod,butwithsomeproceduralmodificationsthattakeprecedencewhenadheringtothespecification.Therefore,itisadvisabletorefertothatmaterialspecificationbeforeusingthistestmethod.Table1ofClassificationD4000liststheASTMmaterialsstandardsthatcurrentlyexist.1.1Thistestmethodcoversthedeterminationofthetensilepropertiesofthermosettingreinforcedplasticsusingtestspecimensofuniformno......
【中国标准分类号】:G31
【国际标准分类号】:83_140_20
【页数】:8P.;A4
【正文语种】:英语