Designation:D5573−99(Reapproved2019)StandardPracticeforClassifyingFailureModesinFiber-Reinforced-Plastic(FRP)Joints1ThisstandardisissuedunderthefixeddesignationD5573;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticecoversthemethodofclassifying,identifying,andcharacterizingthefailuremodesinadhesivelybondedfiber-reinforced-plastic(FRP)joints.TheFRPusedindevelopingthispracticeconsistsofglassfibersinathermoset-polyester-resinmatrix,commonlyreferredtoassheet-moldingcompound,orSMC.1.2Oneobjectiveofthispracticeistopresentcomprehen-sivedefinitionsofpossiblefailuremodestoserveasaguideforcontracts,drawings,productspecifications,andproductperfor-mance.NOTE1—Figures2through11referredtointhepracticearecontainedintheASTMadjunct,ColorPhotographsofFailureModes.2Fig.2—Side-bySideComparisonofFailureModesFig.3—AdhesiveFailureFig.4—CohesiveFailureFig.5—Thin-LayerCohesiveFailureFig.6—Fiber-TearFailureFig.7—Light-Fiber-TearFailureFig.8—Stock-BreakFailureFig.9—MixedFailure—40%Fiber-TearFailure,60%Light-Fiber-TearFiberFig.10—MixedFailure—32%AdhesiveFailure,68%Fiber-TearFailureFig.11—MixedFailure—20%AdhesiveFailure,60%Light-Fiber-TearFailure,20%Fiber-TearFailureNOTE2—Thispracticemaybeusedtodescribethefailuremodesgeneratedfromtesting,usingproceduressuchasTestMethodsD3163,D3164,D3165,D3807,D5041,D5868,andSAEJ1525.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.5Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDeci...
