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【英文标准名称】:StandardPracticeforUltrasonicTestingofFlatPanelCompositesandSandwichCoreMaterialsUsedinAerospaceApplications
【原文标准名称】:航空航天用平板复合材料和夹层芯材的超声波测试用标准实施规程
【标准号】:ASTME2580-2007
【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】:E07.06
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:航空工程;航空航天运输;部件;芯材;平板;夹心芯材;航天技术;超声测试
【英文主题词】:aerospacecomposites;fiber-reinforcedpolymermatrixcomposites;flatpanelcomposites;honeycombcore;laminates;nondestructiveevaluation(NDE);nondestructiveinspection(NDI);nondestructivetesting(NDT);polymericmatrixcomposites(PMC);sandwich
【摘要】:Thispracticeisintendedprimarilyforthetestingofflatpanelcompositesandsandwichcorepanelstoanacceptancecriteriamosttypicallyspecifiedinapurchaseorderorothercontractualdocument.BasisofApplication8212;Thereareareasinthispracticethatrequireagreementbetweenthecognizantengineeringorganizationandthesupplier,orspecificdirectionfromthecognizantengineeringorganization.1.1Thispracticeestablishestwoproceduresforultrasonictesting(UT)offlatpanelcompositesandflatsandwichcorepanels(parallelsurfaces).Typicalas-fabricatedlay-upsincludeuniaxial,crossplyandangleplylaminates;aswellashoneycombsandwichcorematerials.Theseprocedurescanbeusedthroughoutthelifecycleofthematerials;productandprocessdesignoptimization,onlineprocesscontrol,aftermanufactureinspection,andinserviceinspection.Contactmethodssuchasangle-beamtechniquesusingshearwaves,orsurface-beamtechniquesusingLambwaves,arenotdiscussed.1.2Ultrasonictestingisacommonsubsurfacemethodfordetectionoflaminarorienteddiscontinuities.Twotechniquescanbeconsideredbasedonpanelsurfaceaccessibility;pulseechoforonesidedandthroughtransmission(bubblers/squirters)fortwosided.Asusedinthispractice,bothrequiretheuseofapulsedstraight-beamultrasoniclongitudinalwavefollowedbyobservingindicationsofeitherthereflected(pulse-echo)orreceived(throughtransmission)wave.Thegeneraltypesofanomaliesdetectedbybothtechniquesincludeforeignmaterials,delamination,disbond/un-bond,fiberde-bonding,inclusions,porosity,andvoids.1.3Thispracticeprovidestwoultrasonictestprocedures.Eachhasitsownmeritsandrequirementsforinspectionandshallbeselectedasagreeduponinacontractualdocument.1.3.1TestProcedureA,PulseEcho(non-contactingandcontacting)isataminimumasingletransducertransmittingandreceivingalongitudinalwaveintherangeof0.5to20MHz(seeFig.1).Thisprocedurerequiresaccesstoonlyonesideofthespecimen.Thisprocedurecanbeconductedbyautomatedormanualmeans.Automatedandmanualtestresultsmaybeimagedorrecorded.1.3.2TestProcedureB,ThroughTransmissionisacombinationoftwotransducers.Onetransmitsalongitudinalwaveandtheotherreceivesthelongitudinalwaveintherangeof0.5MHzto20MHz(seeFig.2).Thisprocedurerequiresaccesstobothsidesofthespecimen.Thisprocedureisautomatedandtheexaminationresultsarerecorded.1.4Thispracticedoesnotspecifyaccept-rejectcriteria.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【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】: