Designation:D7137/D7137M−12StandardTestMethodforCompressiveResidualStrengthPropertiesofDamagedPolymerMatrixCompositePlates1ThisstandardisissuedunderthefixeddesignationD7137/D7137M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoverscompressionresidualstrengthpropertiesofmultidirectionalpolymermatrixcompositelami-natedplates,whichhavebeensubjectedtoquasi-staticinden-tationperTestMethodD6264/D6264Mordrop-weightimpactperTestMethodD7136/D7136Mpriortoapplicationofcompressiveforce.Thecompositematerialformsarelimitedtocontinuous-fiberreinforcedpolymermatrixcompositeswithmultidirectionalfiberorientations,andwhicharebothsymmet-ricandbalancedwithrespecttothetestdirection.Therangeofacceptabletestlaminatesandthicknessesisdefinedin8.2.NOTE1—Whenusedtodeterminetheresidualstrengthofdrop-weightimpactedplates,thistestmethodiscommonlyreferredtoastheCompressionAfterImpact,orCAI,method.1.2Themethodutilizesaflat,rectangularcompositeplate,previouslysubjectedtoadamagingevent,whichistestedundercompressiveloadingusingastabilizationfixture.NOTE2—Thedamagetolerancepropertiesobtainedareparticulartothetype,geometryandlocationofdamageinflictedupontheplate.1.3Thepropertiesgeneratedbythistestmethodarehighlydependentuponseveralfactors,whichincludespecimengeometry,layup,damagetype,damagesize,damagelocation,andboundaryconditions.Thus,resultsaregenerallynotscalabletootherconfigurations,andareparticulartothecombinationofgeometricandphysicalconditionstested.1.4Thistestmethodcanbeusedtotestundamagedpolymermatrixcompositeplates,buthistoricallysuchtestshavedemonstratedarelativelyhighincidenceofundesirablefailuremodes(suchasendcrushing).TestMethodD6641/D6641Misrecommendedforobtainingcompressivepropertiesofundam-agedpolymermatrixcomposites.1.5ThevaluesstatedineitherSIunit...
