【英文标准名称】:StandardTestMethodforRubberProperty-ExtensionCyclingFatigue
【原文标准名称】:橡胶特性-伸展周期疲劳的标准试验方法
【标准号】:ASTMD4482-2007
【标准状态】:现行
【国别】:
【发布日期】:2007
【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】:D11.15
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:炭黑;延伸;疲劳;天然橡胶;特性;橡胶;合成橡胶;测试
【英文主题词】:fatigue;fatiguelife;strainenergy
【摘要】:Thistestmethodcoversoneprocedurefordeterminingfatiguelifeatvariousextension-ratios.Thestraincycleischaracteristicofthetypeoftestapparatusspecified.Experienceinfatiguetestingshowsthatfatiguelifemayhaveawide,non-normaldistributionand,therefore,alargestandarddeviationthatiscompounddependent.Naturalrubber,forexample,hasshownanarrowerdistributionthanmanysyntheticrubbers.Alargenumberofspecimensmay,therefore,berequiredtoyieldthedesiredprecision.Comparisonofdifferentrubbercompoundsshouldbemadewithdueconsiderationtothestandarddeviationforeach(see7.1).Fatiguedata,asgeneratedinthistestmethod,giveprimarilyanestimateofthecrackinitationbehaviorofarubbervulcanizateandonlyaveryapproximatemeasureofthecrackpropagationrate.Theinformationobtainedmaybeusefulinpredictingtheflex-lifeperformanceofacompoundinactiveservice;however,theusershouldbeawarethatinactualuse,productsaresubjectedtomanyotherfatiguefactorsnotmeasuredinthistestmethod.1.1Thistestmethodcoversthedeterminationoffatiguelifeofrubbercompoundsundergoingatensile-straincycle.Duringpartofthecycle,thestrainisrelaxedtoazerovalue.Thespecimensaretestedwithoutintentionallyinitiatedflaws,cuts,orcracks.Failureisindicatedbyacompleteruptureofthetestspecimen.1.2Noexactcorrelationbetweenthesetestresultsandserviceisgivenorimplied.Thisisduetothevariednatureofserviceconditions.Thesetestproceduresdoyielddatathatcanbeusedforthecomparativeevaluationofrubbercompoundsfortheirabilitytoresist(dynamic)extensioncyclingfatigue.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:G34
【国际标准分类号】:83_060
【页数】:9P.;A4
【正文语种】: