ASTM E2582-2007 航空航天用合成板条和检修片红外闪热成像法的标准实施规程

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【英文标准名称】:StandardPracticeforInfraredFlashThermographyofCompositePanelsandRepairPatchesUsedinAerospaceApplications
【原文标准名称】:航空航天用合成板条和检修片红外闪热成像法的标准实施规程
【标准号】:ASTME2582-2007
【标准状态】:现行
【国别】:
【发布日期】:2007
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:E07.10
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:航空工程;航空航天运输;元部件;红外线;板条;检修;航天技术;温度记录
【英文主题词】:composite;flash;IR;nondestructive;thermography
【摘要】:FTistypicallyusedtoidentifyflawsthatoccurinthemanufactureofcompositestructures,ortotrackflawdevelopmentduringservice.FlawsdetectedwithFTincludedelamination,disbonds,voids,inclusions,foreignobjectdebris,porosityorthepresenceofwaterthatisincontactwiththebacksurface.Withdedicatedsignalprocessingandtheuseofrepresentativetestsamples,characterizationofflawdepthandsize,ormeasurementofcomponentthicknessandthermaldiffusivitymaybeperformed.SinceFTisbasedonthediffusionofthermalenergyfromtheinspectionsurfaceofthespecimentotheopposingsurface(orthedepthplaneofinterest),thepracticerequiresthatdataacquisitionallowssufficienttimeforthisprocesstooccur,andthatatthecompletionoftheacquisitionprocess,theradiatedsurfacetemperaturesignalcollectedbytheIRcameraisstrongenoughtobedistinguishedfromspuriousIRcontributionsfrombackgroundsourcesorsystemnoise.ThismethodisbasedonaccuratedetectionofchangesintheemittedIRenergyemanatingfromtheinspectionsurfaceduringthecoolingprocess.Astheemissivityoftheinspectionsurfacedeviatesfromidealblackbodybehavior(emissivity=1),thesignaldetectedbytheIRcameramayincludecomponentsthatarereflectedfromtheinspectionsurface.Mostcompositematerialscanbeexaminedwithoutspecialsurfacepreparation.However,itmaybenecessarytocoatlow-emissivity,opticallytranslucentinspectionsurfaceswithanopticallyopaque,high-emissivitywater-washablepaint.Thispracticeappliestothedetectionofflawswithaspectratiogreaterthanone.Thispracticeisbasedonthethermalresponseofaspecimentoalightpulsethatisuniformlydistributedovertheplaneoftheinspectionsurface.Toensurethat1-dimensionalheatflowfromthesurfaceintothesampleistheprimarycoolingmechanismduringthedataacquisitionperiod,theheightandwidthdimensionsoftheheatedareashouldbesignificantlygreaterthanthethicknessofthespecimen,orthedepthplaneofinterest.Thispracticeappliestoflatpanels,ortocurvedpanelswherethelocalsurfacenormalislessthan30degreesfromtheIRcameraopticalaxis1.1ThispracticedescribesaprocedurefordetectingsubsurfaceflawsincompositepanelsandrepairpatchesusingFlashThermography(FT),inwhichaninfrared(IR)cameraisusedtodetectanomalouscoolingbehaviorofasamplesurfaceafterithasbeenheatedwithaspatiallyuniformlightpulsefromaflashlamparray.1.2ThispracticedescribesestablishedFTtestmethodsthatarecurrentlyusedbyindustry,andhavedemonstratedutilityinqualityassuranceofcompositestructuresduringpost-manufacturingandin-serviceexaminations.1.3Thispracticehasutilityfortestingofpolymercompositepanelsandrepairpatchescontaining,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.1.5Thispracticeappliestopolymerorceramicmatrixcompositestructureswithinspectionsurfacesthataresufficientlyopticallyopaquetoabsorbincidentlight,andthathavesufficientemissivitytoallowmonitoringofthesurfacetemperaturewithanIRcamera.Excessivelythick......
【中国标准分类号】:V22
【国际标准分类号】:49_035
【页数】:6P.;A4
【正文语种】: