【英文标准名称】:StandardTestMethodforTensileStrengthandBreakingTenacityofWoolFiberBundles1-in.(25.4-mm)GageLength
【原文标准名称】:1英寸(25.4毫米)规准长度羊毛纤维束的拉伸强度和断裂强度的标准试验方法
【标准号】:ASTMD1294-2005
【标准状态】:现行
【国别】:
【发布日期】:2005
【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】:纤维束断裂强度;试验;纺织纤维;纺织材料;羊毛;纤维;拉伸强度
【英文主题词】:breakingstrength;wool
【摘要】:TestMethodD1294forthedeterminationoftensilestrengthmaybeusedfortheacceptancetestingofcommercialshipmentsofwool,butcautionisadvisedsincetechniciansmayfailtogetgoodagreementbetweenresults.Comparativetestsasdirectedin5.1.1maybeadvisable.5.1.1Iftherearedifferencesofpracticalsignificancebetweenreportedtestresultsfortwolaboratories(ormore),comparativetestshouldbeperformedtodetermineifthereisastatisticalbiasbetweenthem,usingcompetentstatisticalassistance.Asaminimum,usethesamplesforsuchacomparativetestthatareashomogenousaspossible,drawnfromthesamelotofmaterialasthesamplesthatresultedindisparateresultsduringinitialtestingandrandomlyassignedinequalnumberstoeachlaboratory.Thetestresultsfromthelaboratoriesinvolvedshouldbecomparedusingastatisticaltestforunpaireddata,aprobabilitylevelchosenpriortothetestingseries.Ifbiasisfound,eitheritscausemustbefoundandcorrected,orfuturetestresultsforthatmaterialmustbeadjustedinconsiderationoftheknownbias.Thistestmethodisusefulinstudyingtherelationshipbetweenfiberstrengthandproductquality;resultsshouldbeconsideredcomparativeratherthanfundamentalsincethestrengthfoundwillbelowerthanthesumofthestrengthsoftheindividualfiberspresentduetoslightdifferencesintensioning.Elongationmaybeobtainedalsobuttheaccuracyofelongationmeasurementsislimitedandtheirdeterminationis,therefore,notincludedasaformalpartofthistestmethod.ThebasicdifferencesbetweentheproceduresemployedinthistestmethodandthoseofTestMethodD2524areinthegagelengthsemployedandthemethodsofclamping.InTestMethodD2524,specificclampsarerequiredwhereasinTestMethodD1294,anyconventionalclampsmaybeused.ResultsforbreakingloaddeterminedbyTestMethodD2524average30%higherthanthoseobtainedbyTestMethodD1294.1.1Thistestmethodcoversthedeterminationofthebreakingforce(orload)andestimationofthetensilestrengthandtenacityofwoolfiberbundleswitha1-in.(25.4-mm)gagelength.Aprocedureforpreparationofthefiberbundleisincluded.1.2Thevaluesstatedininch-poundunitsaretoberegardedasstandard;thevaluesinSIunitsareprovidedforinformationonly.Becausetheinstrumentiscalibratedininch-poundunits,inch-poundunitsareshownfirst,contrarytoCommitteeD13policy.Note1--Forothermethodsofmeasuringbreakingtenacityoffiberbundles,refertoTestMethodsD1445andD2524.Note2--Thistestmethodcanbeusedforotherfibersthatlendthemselvestothesamekindofpreparationbutthedifferenceindensitymustbetakenintoaccountwhencalculatingthetensilestrength.Itisnotnecessarytoknoworcorrectforthedensityofafiberwhencalculatingbreakingtenacity.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibiltiyoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:W20
【国际标准分类号】:59_060_10
【页数】:6P.;A4
【正文语种】: