Designation:D6588/D6588M−11(Reapproved2016)StandardTestMethodforFatigueofTireCords(DiscFatigueTest)1ThisstandardisissuedunderthefixeddesignationD6588/D6588M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationoffatigueoftirecordsinrubberduetocompressionorextension,orboth,usingadiscfatiguetester.Thefatigueismeasuredasalossinstrength.1.2ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnonconformancewiththestandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticestodeterminetheapplicabilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D76SpecificationforTensileTestingMachinesforTextilesD123TerminologyRelatingtoTextilesD885TestMethodsforTireCords,TireCordFabrics,andIndustrialFilamentYarnsMadefromManufacturedOrganic-BaseFibersD1776PracticeforConditioningandTestingTextilesD6477TerminologyRelatingtoTireCord,BeadWire,HoseReinforcingWire,andFabricsD7269TestMethodsforTensileTestingofAramidYarns3.Terminology3.1Definitions:3.1.1Fordefinitionsoftermsrelatingtotirecordandfabrics,seeTerminologyD6477.3.1.2Fordefinitionsofothertermsrelatedtotextiles,seeTerminologyD123.4.SummaryofTestMethod4.1discfatigueisameasureofthestrengthlossofatirecord,whichissubjectedtorepeatedstresses.Thestressesareaccomplishedbysubjectingthetirecords,afterbeingcuredinrubber,torepeatedcyclesofcompressionandextension.4.2Thespecimenofinterestisthecordafterithasbeenstressedandlaterremovedfromtherubberinwhichitwasimbedded.Cordsp...
