【英文标准名称】:StandardTestMethodforBreakingTenacityofWoolFibers,FlatBundleMethod-1/8-in.(3.2-mm)GageLength
【原文标准名称】:毛纤维抗断裂强度的试验方法.平列纤维束法.1/8in(3.2mm)规范长度的标准试验方法
【标准号】:ASTMD2524-1995(2008)
【标准状态】:现行
【国别】:美国
【发布日期】:1995
【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】:D13.13
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:breakingtenacity;fibers;wool;Woolandwooltop--breakingstrength
【摘要】:TestMethodD2524fortestingwoolfibersfortenacityisconsideredsatisfactoryforacceptancetestingwhentheparticipatinglaboratories,usingareferencewool,haveshownacceptablebetween-laboratoryprecision.Itisrecommendedthatanyprogramofacceptancetestingbeprecededbyaninterlaboratorycheckinthelaboratoryofthepurchaserandthelaboratoryoftheselleronreplicatespecimensofsamplesofthematerialtobeevaluated.Incasesofdispute,thestatisticalbias,ifany,betweenthelaboratoryofthepurchaserandthesellershouldbedeterminedwitheachcomparisonbeingbasedontestingrandomizedspecimensfromonesampleofmaterialofthetypebeingevaluated.Valuesobtainedfromflatbundletenacityshowagoodcorrelationwithvaluesobtainedfromsinglefibertestsandrequiremuchlesstime.ThebasicdifferencesbetweentheproceduresdescribedinTestMethodD2524andthosedescribedinTestMethodD1294lieinthemannerofclampingthebundlesandtheshortergagelengthemployed.Thespecialclampsusedinthismethodallowquickerandeasierbundlepreparation;however,forTestMethodD1294nospecialclampsarerequired.CloseragreementwithsinglefibertenacityisalsoobtainedwithTestMethodD2524thanwhenusingtheprocedureinTestMethodD1294.Astheobservedtenacityoffibersdependsinpartonthetypeoftensiletestingmachineusedandthetimerequiredtobreakthespecimen,resultsobtainedwiththedifferenttypesofmachineswhichmaybeusedinthismethodwillnotnecessarilyagree.ThemachinesspecificallydesignedforbundletestingareCRLtesterswhichoperateataloadingrateof1kgf/sandthereforereachthebreakingforceatvariabletimesintheorderof5s.CREandCRTtypemachineswouldbeexpectedtoproducesomewhatdifferentresultsnotonlybecauseoftheinherentdifferenceinoperationbutbecauseCREandCRTtypemachinesaretobeoperatedataratetoachievethebreakingloadin20s.1.1Thistestmethodcoversthedeterminationofthebreakingtenacityofwoolfibersasaflatbundlewitha1/8-in.(3.2-mm)clampseparation.1.2Thistestmethodisespeciallyadaptedtothefiberbundleclampsandstrengthtestinginstrumentsspecified,butmaybeusedonothertensiletestingmachineswhenequippedwithappropriateadapterstoaccommodatetheprescribedclamps.1.3Thistestmethodisapplicabletowoolinanyformwhichcanbehand-combedintosmallbundlesofparallelizedfibers.Note18212;OthertestmethodsformeasuringbreakingtenacityoffiberbundlesincludeTestMethodsD1294,D1445,andD540.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.1.5Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.TheSIunitsinparenthesesareprovidedforinformationonly.
【中国标准分类号】:W20
【国际标准分类号】:59_060_10
【页数】:4P.;A4
【正文语种】:英语