Designation:E2582−07(Reapproved2014)StandardPracticeforInfraredFlashThermographyofCompositePanelsandRepairPatchesUsedinAerospaceApplications1ThisstandardisissuedunderthefixeddesignationE2582;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope1.1Thispracticedescribesaprocedurefordetectingsub-surfaceflawsincompositepanelsandrepairpatchesusingFlashThermography(FT),inwhichaninfrared(IR)cameraisusedtodetectanomalouscoolingbehaviorofasamplesurfaceafterithasbeenheatedwithaspatiallyuniformlightpulsefromaflashlamparray.1.2ThispracticedescribesestablishedFTtestmethodsthatarecurrentlyusedbyindustry,andhavedemonstratedutilityinqualityassuranceofcompositestructuresduringpost-manufacturingandin-serviceexaminations.1.3Thispracticehasutilityfortestingofpolymercompos-itepanelsandrepairpatchescontaining,butnotlimitedto,bismaleimide,epoxy,phenolic,poly(amideimide),polybenzimidazole,polyester(thermosettingandthermoplastic),poly(etheretherketone),poly(etherimide),polyimide(thermosettingandthermoplastic),poly(phenylenesulfide),orpolysulfonematrices;andalumina,aramid,boron,carbon,glass,quartz,orsiliconcarbidefibers.Typicalas-fabricatedgeometriesincludeuniaxial,crossplyandangleplylaminates;aswellashoneycombcoresandwichcorematerials.1.4Thispracticehasutilityfortestingofceramicmatrixcompositepanelscontaining,butnotlimitedto,siliconcarbide,siliconnitrideandcarbonmatrixandfibers.1.5Thispracticeappliestopolymerorceramicmatrixcompositestructureswithinspectionsurfacesthataresuffi-cientlyopticallyopaquetoabsorbincidentlight,andthathavesufficientemissivitytoallowmonitoringofthesurfacetem-peraturewithanIRcamera.Excessivelythicksamples,orsampleswithlowthermaldiffusivities,requirelongacquisitionperiodsandyieldweaksign...
