SAE AMS5343 Steel, Corrosion-Resistant, Investment Castings, 16Cr - 4.1Ni - 0.28Cb (Nb) - 3.2Cu, Homogenization, Solutio

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【英文标准名称】:StandardTestMethodforBreakingForceandElongationofTextileFabrics(StripMethod)
【原文标准名称】:纺织纤维的伸长率和断裂力的标准试验方法(剥离法)
【标准号】:ASTMD5035-2006(2008)e1
【标准状态】:现行
【国别】:美国
【发布日期】:2006
【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】:D13.60
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:breaking-strength;fabric;elongation;fabric;nonwoven-fabric;wovenfabric;Acceptancecriteria/testing--textilefabrics/fibers;Breakingstrength/tenacity--textilefabrics/fibers;Cutstriptest;Elongation--textiles;Raveledstriptest;Stripforc
【摘要】:Theraveledstriptestinthistestmethodisconsideredsatisfactoryforacceptancetestingofcommercialshipmentsofwoventextilefabricsbecausethemethodhasbeenusedextensivelyinthetradeforacceptancetesting.Thesameistrueforthecutstriptestforfeltedornonwoventextilefabrics.Iftherearedifferencesofpracticalsignificancebetweenreportedtestresultsfortwolaboratories(ormore),comparativetestshouldbeperformedtodetermineifthereisastatisticalbiasbetweenthem,usingcompetentstatisticalassistance.Ataminimum,usethesamplesforsuchacomparativetestthatareashomogeneousaspossible,drawnfromthesamelotofmaterialasthesamplesthatresultedindisparateresultsduringinitialtestingandrandomlyassignedinequalnumberstoeachlaboratory.Thetestresultsfromthelaboratoriesinvolvedshouldbecomparedusingastatisticaltestforunpaireddata,aprobabilitylevelchosenpriortothetestingseries.Ifbiasisfound,eitheritscausemustbefoundandcorrected,orfuturetestresultsforthatmaterialmustbeadjustedinconsiderationoftheknownbias.Themethodisnotrecommendedforknittedfabricsbecauseoftheirhighstretch.Somemodificationofthetechniquesmaybenecessaryforanyfabrichavingastrengthinexcessof200N/cm(1140lbf/in.)width.Specialprecautionarymeasuresareprovidedforusewhennecessarywithstrongfabrics,orfabricsmadefromglassfibers(seeSpecificationD579),topreventthemfromslippingintheclampsorbeingdamagedasaresultofbeinggrippedintheclamps.Alloftheproceduresareapplicablefortestingfabricseitherconditionedorwet.Comparisonofresultsfromtensiletestingmachinesoperatingondifferentprinciplesisnotrecommended.Whendifferenttypesofmachinesareusedforcomparisontesting,constanttime-to-breakat20x00B1;3sistheestablishedwayofproducingdata.Eventhenthedatamaydiffersignificantly.Althoughaconstant-rate-of-extensiontensiletestingmachineispreferredinthesemethods,incasesofdispute,unlessthereisagreementtothecontrarybetweenthepurchaserandsupplier,aconstant-time-to-break(20x00B1;3s)istobeused.Theraveledstripprocedureisapplicabletothedeterminationoftheforcerequiredtobreakaspecificwidthoffabric.Thebreakingforceinformationonwovenfabricsisparticularlyusefulforcomparisonoftheeffectivestrengthoftheyarnsinthefabricwiththecombinedstrengthofanequalnumberofthesameyarnswhicharenotwoven.Theprocedureisnotrecommendedforfabricshavingfewerthan20yarnsacrossthewidthofthespecimen.Ifa20-yarns-per-specimenwidthcannotbeobtainedwitha25-mm(1-in.)strip,a50-mm(2-in.)stripshouldbeused.Ingeneral,theobservedforcefora50-mm(2-in.)specimenisnotdoubletheobservedforcefora25-mm(1-in.)specimenandtheresultsshouldbereportedasobservedona50-mm(2-in.)stripwithoutmathematicaladjustmentto25mm(1in.).Ifafabriccannotberaveledreadily,useeitheracutstriporgrabprocedure.Thecutstripprocedureisapplicabletoheavilyfulledfabrics,wovenfabricsthatcannotbereadilyraveled,feltedfabricsandnonwovenfabrics.Thisprocedureisnotrecommendedforfabricswhichcanberaveledbecausetheyarnsattheedgestendtounravelduringtesting.Therecommendationregardingtheminimumnumberofyarnsinawovenspecimendiscussedin5.7forraveledstripsappliesequallytocutstrips.1.1Thistestmethodcoversraveledstripandcutstriptestproceduresfordeterminingthebreakingforceandelongationofmosttextilefabrics.Provisionismadeforwettesting.1.1.1Theraveledstriptestisapplicabletowovenfabricswhilet......
【中国标准分类号】:W04
【国际标准分类号】:
【页数】:7P.;A4
【正文语种】:英语