标准资料网-标准资料免费资源平台

【英文标准名称】:Corrosionofmetalsandalloys.Determinationofbimetalliccorrosioninoutdoorexposurecorrosiontests.
【原文标准名称】:金属和合金的腐蚀.室外暴露腐蚀试验中双金属的测定
【标准号】:NFA05-308-1995
【标准状态】:现行
【国别】:法国
【发布日期】:1995-05-01
【实施或试行日期】:1995-05-20
【发布单位】:法国标准化协会(AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:
【中国标准分类号】:H25
【国际标准分类号】:77_060
【页数】:16P;A4
【正文语种】:其他


【英文标准名称】:StandardPracticeforConstant-Amplitude,Axial,Tension-TensionCyclicFatigueofContinuousFiber-ReinforcedAdvancedCeramicsatAmbientTemperatures
【原文标准名称】:连续纤维增强高级陶瓷在环境温度下的恒幅轴向张力循环疲劳性能测定的标准实施规程
【标准号】:ASTMC1360-2010
【标准状态】:现行
【国别】:美国
【发布日期】:2010
【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】:C28.07
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:ceramicmatrixcomposite;CFCC;continuousfiberceramiccomposite;cyclicfatigue;S-Ncurve;tension-tensioncyclicfatigue;:Advancedceramics;Ceramiccomposites;CFCC(continuousfiber-reinforcedceramiccomposite);Continuousfiber-reinforcedceram
【摘要】:Thispracticemaybeusedformaterialdevelopment,materialcomparison,qualityassurance,characterization,reliabilityassessment,anddesigndatageneration.Continuousfiber-reinforcedceramicmatrixcompositesaregenerallycharacterizedbycrystallinematricesandceramicfiberreinforcements.Thesematerialsarecandidatematerialsforstructuralapplicationsrequiringhighdegreesofwearandcorrosionresistance,andhigh-temperatureinherentdamagetolerance(thatis,toughness).Inaddition,continuousfiber-reinforcedglassmatrixcompositesarecandidatematerialsforsimilarbutpossiblyless-demandingapplications.Althoughflexuraltestmethodsarecommonlyusedtoevaluatethemechanicalbehaviorofmonolithicadvancedceramics,thenon-uniformstressdistributioninaflexuraltestspecimeninadditiontodissimilarmechanicalbehaviorintensionandcompressionforCFCCsleadstoambiguityofinterpretationoftestresultsobtainedinflexureforCFCCs.Uniaxially-loadedtensiletestsprovideinformationonmechanicalbehaviorforauniformlystressedmaterial.ThecyclicfatiguebehaviorofCFCCscanhaveappreciablenon-lineareffects(forexample,slidingoffiberswithinthematrix)whichmayberelatedtotheheattransferofthespecimentothesurroundings.Changesintesttemperature,frequency,andheatremovalcanaffecttestresults.Itmaybedesirabletomeasuretheeffectsofthesevariablestomorecloselysimulateend-useconditionsforsomespecificapplication.CyclicfatiguebyitsnatureisaprobabilisticphenomenonasdiscussedinSTP91A(Ref(1))andSTP588(Ref(2)).Inaddition,thestrengthsofthebrittlematricesandfibersofCFCCsareprobabilisticinnature.Therefore,asufficientnumberoftestspecimensateachtestingconditionisrequiredforstatisticalanalysisanddesign,withguidelinesforsufficientnumbersprovidedinSTP91A(Ref(1)),STP588(Ref(2)),andPracticeE739.StudiestodeterminetheinfluenceoftestspecimenvolumeorsurfaceareaoncyclicfatiguestrengthdistributionsforCFCCshavenotbeencompleted.Themanydifferenttensiletestspecimengeometriesavailableforcyclicfatiguetestingmayresultinvariationsinthemeasuredcyclicfatiguebehaviorofaparticularmaterialduetodifferencesinthevolumeofmaterialinthegagesectionofthetestspecimens.Tensilecyclicfatiguetestsprovideinformationonthematerialresponseunderfluctuatinguniaxialtensilestresses.Uniformstressstatesarerequiredtoeffectivelyevaluateanynonlinearstress-strainbehaviorwhichmaydevelopastheresultofcumulativedamageprocesses(forexample,matrixmicrocracking,fiber/matrixdebonding,delamination,cyclicfatiguecrackgrowth,etc.)Cumulativedamageduetocyclicfatiguemaybeinfluencedbytestingmode,testingrate(relatedtofrequency),differencesbetweenmaximumandminimumforce(Rorx0391;),effectsofprocessingorcombinationsofconstituentmaterials,and/orenvironmentalinfluences(includingtestenvironmentandpre-testconditioning),orboth.Someoftheseeffectsmaybeconsequencesofstresscorrosionorsubcritical(slow)crackgrowthwhichcanbedifficulttoquantify.Otherfactorswhichmayinfluencecyclicfatiguebehaviorare:matrixorfibermaterial,voidorporositycontent,methodsoftestspecimenpreparationorfabrication,volumepercentofthereinforcement,orientationandstackingofthereinforcement,testspecimenconditioning,testenvironment,forceorstrainlimitsduringcycling,waveshapes(thatis,sinusoidal,trapezoidal,etc.),andfailuremodeoftheCFCC.Theresultsofcyclic.......
【中国标准分类号】:Q32
【国际标准分类号】:81_060_30
【页数】:9P.;A4
【正文语种】:英语