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【英文标准名称】:StandardTestMethodforPeelStrength("T"Method)ofHookandLoopTouchFasteners
【原文标准名称】:钩状和环状连接紧固件的坯料剥离强度的标准试验方法(T方法)
【标准号】:ASTMD5170-1998(2010)
【标准状态】:现行
【国别】:美国
【发布日期】:1998
【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】:D13.54
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:fastener;hookandloop;hook;loop;peel;peelstrength;touchfastener;T-peeltest;Constantrate-of-extension(CRE)test;Fasteners;Hookandlooptouchfasteners;Loopfasteners;Peelstrengthtests;Tensileproperties/testing--textilematerials/app
【摘要】:Thistestmethodgivesameasureofakeypropertyofhookandlooptouchfastenerswhichisofinteresttousersofsuchdevices.Thisisameansofdeterminingtheresistancetoseparationwhenforcesareappliednormaltothelineofseparationofthefastener.Theforceregisteredinapeeltestisirregular,andasaconsequence,empiricalmethodshavehadtobedevelopedtoobtainusablevaluesrelatedtopeelstrength.Inspiteoftheempiricalnatureofthereportedvalues,itisbelievedtheyreflectcomparativeperformanceofsimilartouchfastenerstestedandmeasuredinthesameway.Twooptionalmethodsofcalculationareprovided:integratoraverageandaverageoffivehighestpeaks.Thesetestmethodsarenotequivalent.Generally,theintegratoraveragewillbelowerthantheaverageofthefivehighestpeaks.Thehighestpeakswhichreflecttheforcerequiredtoseparateahookandloopclosurebearnosimplerelationshiptotheaverageforce(integratoraverage).Theaverageofthefivehighestpeaksbetterreflectperformancebuttheintegratorresultsmaybeusedtocharacterizeaclosureandforqualitycontrolpurposes.Theintegratoraverageisrelativelyeasytocalculategiventheproperequipment.Inthecaseofadisputearisingfromdifferencesinreportedtestresultswhenusingthistestmethodforacceptancetestingofcommercialshipments,thepurchaserandthesuppliershouldconductcomparativeteststodetermineifthereisastatisticalbiasbetweentheirlaboratories.Competentstatisticalassistanceisrecommendedfortheinvestigationofbias.Asaminimum,thetwopartiesshouldtakeagroupoftestspecimenswhichareashomogenousaspossibleandwhicharefromalotofhookandloopofthetypeinquestion.Thetestspecimensshouldthenberandomlyassignedinequalnumberstoeachlaboratoryfortesting.TheaverageresultsfromthetwolaboratoriesshouldbecomparedusingStudent''st-testandanacceptableprobabilitylevelchosenbythetwopartiesbeforethetestingbegan.Ifabiasisfound,eitheritscausemustbefoundandcorrectedorthepurchaserandthesuppliermustagreetointerpretfuturetestresultsinthelightoftheknownbias.1.1Thistestmethodcoversthemeasurementofthepeelstrengthofhookandlooptouchfastenersusingarecordingconstant-rate-of-extensiontensiletestingmachine(CRE).1.2Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyproblems,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:J13
【国际标准分类号】:61_040
【页数】:3P.;A4
【正文语种】:英语


【英文标准名称】:Non-destructivetesting.Imagequalityofradiogaphs.Part1:imagequalityindicators(wiretype),determinationofimagequalityvalue.
【原文标准名称】:无损检验.射线照片的图像质量.第1部分:图像质量指示器(丝型).图像质量值的测定
【标准号】:NFA09-205-1-1994
【标准状态】:现行
【国别】:法国
【发布日期】:1994-04-01
【实施或试行日期】:1994-04-05
【发布单位】:法国标准化协会(FR-AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:Designations;Determination;Dimensions;Imagequality;Imagequalityindicators;Imagequalityvalues;Marking;Materialstesting;Non-destructivetesting;Photographicimages;Quality;Radiographs;Radiography;Use
【摘要】:
【中国标准分类号】:H26
【国际标准分类号】:19_100
【页数】:7P.;A4
【正文语种】:其他