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1、Designation:D5587?15StardTestMethodfTearingStrengthofFabricsbyTrapezoidProcedure1ThisstardisissuedunderthefixeddesignationD5587thenumberimmediatelyfollowingthedesignationindicatestheyearofiginaladoptioninthecaseofrevisio
2、ntheyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperepsilon()indicatesaneditialchangesincethelastrevisionreapproval.1.Scope1.1Thistestmethodcoversthemeasurementofthetearingstrengthoftextilef
3、abricsbythetrapezoidprocedureusingarecdingconstantrateofextensiontype(CRE)tensiletestingmachine.1.1.1TheCREtypetensiletestingmachinehasbecomethepreferredtestapparatusfdeterminingtrapezoidtearingstrength.Itisrecognizedtha
4、tsomeconstantrateoftraversetype(CRT)tensiletestingmachinescontinuetobeused.Consequentlythesetestinstrumentsmaybeusedwhenagreeduponbetweenthepurchaserthesupplier.TheconditionsfuseoftheCRTtypetensiletesterareincludedinAppe
5、ndixX1.1.2Thistestmethodappliestomostfabricsincludingwovenfabricsairbagfabricsblanketsnappedfabricsknittedfabricslayeredfabricspilenonwovenfabrics.Thefabricsmaybeuntreatedheavilysizedcoatedresintreatedotherwisetreated.In
6、structionsareprovidedftestingspecimenswithwithoutwetting.1.3Tearingstrengthasmeasuredinthistestmethodrequiresthatthetearbeinitiatedbefetesting.Thereptedvalueobtainedisnotdirectlyrelatedtothefcerequiredtoinitiatestartatea
7、r.1.4Twocalculationsftrapezoidtearingstrengthareprovided:thesinglepeakfcetheaverageoffivehighestpeakfces.1.5ThevaluesstatedinSIunitsaretoberegardedasthestard.Thevaluesstatedininchpoundunitsmaybeapproximate.1.6Thisstarddo
8、esnotpurpttoaddressallofthesafetyconcernsifanyassociatedwithitsuse.Itistheresponsibilityoftheuserofthisstardtoestablishappropriatesafetyhealthpracticesdeterminetheapplicabilityofregulatylimitationspritouse.2.ReferencedDo
9、cuments2.1ASTMStards:2D76SpecificationfTensileTestingMachinesfTextilesD123TerminologyRelatingtoTextilesD629TestMethodsfQuantitativeAnalysisofTextilesD1776PracticefConditioningTestingTextilesD2904PracticefInterlabatyTesti
10、ngofaTextileTestMethodthatProducesNmallyDistributedData(Withdrawn2008)3D2906PracticefStatementsonPrecisionBiasfTextiles(Withdrawn2008)3D4850TerminologyRelatingtoFabricsFabricTestMethods3.Terminology3.1Fallterminologyrela
11、tingtoD13.59FabricTestmethodsGeneralrefertoTerminologyD4850.3.1.1Thefollowingtermsarerelevanttothisstard:fabricintextilespeakfceinteartestingoffabricstearingfceinfabrictearingstrengthinfabricsyarndisttion(seeFig.1).3.2Fa
12、llothertermsrelatedtotextilesrefertoTerminologyD123.4.SummaryofTestMethod4.1Anoutlineofanisoscelestrapezoidismarkedonarectangularspecimen(seeFig.2).Thespecimenisslitatthecenterofthesmallestbaseofthetrapezoidtostartthetea
13、r.Thenonparallelsidesofthemarkedtrapezoidareclampedinparallelclampsofatensiletestingmachine.Theseparationoftheclampsisincreasedcontinuouslytoapplyafcetopropagatethetearacrossthespecimen.Atthesametimethefcedevelopedisrecd
14、ed.Thefcetocontinuetheteariscalculatedfromautographictrecdersmicroprocessdatacollectionsystems.1ThistestmethodisunderthejurisdictionofASTMCommitteeD13onTextilesisthedirectresponsibilityofSubcommitteeD13.60onFabricTestMet
15、hodsSpecific.CurrenteditionapprovedJuly12015.PublishedSeptember2015.iginallyapprovedin1996.Lastpreviouseditionapprovedin2014asD5587–14.DOI:10.1520D558715.2FreferencedASTMstardsvisittheASTMwebsitewww.astm.gcontactASTMCust
16、omerServiceat.FAnnualBookofASTMStardsvolumeinfmationrefertothestard’sDocumentSummarypageontheASTMwebsite.3Thelastapprovedversionofthishisticalstardisreferencedonwww.astm.g.Copyright?ASTMInternational100BarrHarbDrivePOBox
17、C700WestConshohockenPA194282959.UnitedStates1piecesoffabrictobetheprimarysamplingunits.IntheabsenceofsuchanagreementtakethenumberoffabricrollsspecifiedinTable1.NOTE1—Anadequatespecificationotheragreementbetweenthepurchas
18、erthesupplierrequirestakingintoaccountthevariabilitybetweenrollspiecesoffabricbetweenspecimensfromaswatchfromarollpieceoffabrictoprovideasamplingplanwithameaningfulproducer’sriskconsumer’sriskacceptablequalitylevellimiti
19、ngqualitylevel.7.2LabatySample—Facceptancetestingtakeaswatchextendingthewidthofthefabricapproximately1m(1yd)alongthemachinedirectionfromeachrollpieceinthelotsample.Frollsoffabrictakeasamplethatwillexcludefabricfromtheout
20、erwrapoftherolltheinnerwraparoundtheceoftherolloffabric.7.2.1StretchFabrics—Ffabricswithstretchyarnslaboratysamplesshallbeallowedtorelaxlyingflatf24hintheconditionedatmosphereoutlinedinSection9.Oncerelaxedsamplesaretobem
21、arkedcutasdescribedabove.7.3TestSpecimens—Fromeachlabatysamplingunittakefivespecimensfromthemachinedirectionfivespecimensfromthecrossmachinedirectionfeachtestconditiondescribedin9.19.2asapplicabletoamaterialspecification
22、contractder.7.3.1DirectionofTest—Considerthelongdirectionasthedirectionoftest.7.3.2CuttingTestSpecimens—Takethespecimenstobeusedfthemeasurementofmachinedirectionwiththelongerdimensionparalleltothemachinedirection.Takethe
23、specimenstobeusedfthemeasurementofthecrossmachinedirectionwiththelongerdimensionparalleltothecrossmachinedirection.Whenspecimensaretobetestedwettakethespecimensfromareasadjacenttothedrytestspecimens.Labeltomaintainspecim
24、enidentity.7.3.2.1Incuttingthewovenfabricspecimenstakecaretoaligntheyarnsrunningintheshtdirectionparallelwiththediesuchthatwhentheslitiscutthesubsequenttearwilltakeplacebetweentheseyarnsnotacrossthem.Thisprecautionismost
25、imptantwhentestingbowedfabrics.7.3.2.2Cutspecimensrepresentingabroaddistributionacrossthewidthlengthpreferablyalongthediagonalofthelabatysamplenonearertheedgethanonetenthitswidth.Ensurespecimensarefreeoffoldscreaseswrink
26、les.Avoidgettingoilwatergreasesofthonthespecimenswhenhling.7.3.2.3Usethecuttingdietemplatedescribedin6.3showninFig.2.Markeachspecimenwithanisoscelestrapezoidtemplate(seeFig.2).Makeapreliminarycut15mm(0.625in.)longatthece
27、nterofthe25mm(1in.)edgeasshowninFig.2.NOTE2—Testswerecarriedoutin2007toevaluatewhetherthespecimensizeclampsseparationcouldbeincreasedtofacilitateeasierloadingofthespecimen.Itwasfoundthatthiscausedadifferenceinthefinalres
28、ultsdependingonthefabrictype.Therefeitisnotpossibletoincreasethespecimensize.8.PreparationofTestApparatusCalibration8.1Setthedistancebetweentheclampsatthestartofthetestat2561mm(160.05in.).FIG.2TemplatesfCuttingMarkingTra
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