Designation:D5961/D5961M−13StandardTestMethodforBearingResponseofPolymerMatrixCompositeLaminates1ThisstandardisissuedunderthefixeddesignationD5961/D5961M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthebearingresponseofpinnedorfastenedjointsusingmulti-directionalpolymermatrixcompositelaminatesreinforcedbyhigh-modulusfibersbydouble-sheartensileloading(ProcedureA),single-sheartensileorcompressiveloadingofatwo-piecespecimen(ProcedureB),single-sheartensileloadingofaone-piecespecimen(ProcedureC),ordouble-shearcompressiveloading(Proce-dureD).Standardspecimenconfigurationsusingfixedvaluesoftestparametersaredescribedforeachprocedure.However,whenfullydocumentedinthetestreport,anumberoftestparametersmaybeoptionallyvaried.Thecompositematerialformsarelimitedtocontinuous-fiberordiscontinuous-fiber(tapeorfabric,orboth)reinforcedcompositesforwhichthelaminateisbalancedandsymmetricwithrespecttothetestdirection.Therangeofacceptabletestlaminatesandthick-nessesaredescribedin8.2.1.1.2ThistestmethodisconsistentwiththerecommendationsofMIL-HDBK-17,whichdescribesthedesirableattributesofabearingresponsetestmethod.1.3Themulti-fastenertestconfigurationsdescribedinthistestmethodaresimilartothoseusedbyindustrytoinvestigatethebypassportionofthebearingbypassinteractionresponseforboltedjoints,wherethespecimenmayproduceeitherabearingfailuremodeorabypassfailuremode.Notethatthescopeofthistestmethodislimitedtobearingandfastenerfailuremodes.UseTestMethodD7248/D7248Mforby-passtesting.1.4ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.4.1Withinthetex...
