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【英文标准名称】:Testsforfireresistanceofroofcoveringmaterials
【原文标准名称】:屋面覆盖材料耐火性的试验
【标准号】:UL790-1995
【标准状态】:作废
【国别】:美国
【发布日期】:1995-10
【实施或试行日期】:
【发布单位】:美国保险商实验所(UL)
【起草单位】:UL
【标准类型】:()
【标准水平】:()
【中文主题词】:松木;胶合板;飞火;火灾;燃烧试验;耐火性;屋顶层;火焰传播
【英文主题词】:flyingbrands;fireresistance;roofcoverings;firetests;plywood;fire;flamepropagation;pine(wood)
【摘要】:
【中国标准分类号】:Q10
【国际标准分类号】:13_220_50
【页数】:26P;A4
【正文语种】:英语


【英文标准名称】:StandardTestMethodforMonotonicCompressiveStrengthofAdvancedCeramicsatAmbientTemperature
【原文标准名称】:室温下高级陶瓷持久抗压强度的标准试验方法
【标准号】:ASTMC1424-2004
【标准状态】:现行
【国别】:
【发布日期】:2004
【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】:C28.01
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:陶瓷;压缩试验;抗压强度;高级工业陶瓷;环境温度;试验方法
【英文主题词】:advancedceramic;compressiontest;compressivestrength
【摘要】:Thistestmethodmaybeusedformaterialdevelopment,materialcomparison,qualityassurance,characterization,anddesigndatageneration.Generally,resistancetocompressionisthemeasureofthegreateststrengthofamonolithicadvancedceramic.Ideally,ceramicsshouldbecompressivelystressedinuse,althoughengineeringapplicationsmayfrequentlyintroducetensilestressesinthecomponent.Nonetheless,compressivebehaviorisanimportantaspectofmechanicalpropertiesandperformance.Althoughtensilestrengthdistributionsofceramicsareprobabilisticandcanbedescribedbyaweakestlinkfailuretheory,suchdescriptionshavebeenshowntobeinapplicabletocompressivestrengthdistributionsinatleastonestudy(1).3However,theneedtotestastatisticallysignificantnumberofcompressivetestspecimensisnotobviated.Therefore,asufficientnumberoftestspecimensateachtestingconditionisrequiredforstatisticalanalysisanddesign.Compressiontestsprovideinformationonthestrengthanddeformationofmaterialsunderuniaxialcompressivestresses.Uniformstressstatesarerequiredtoeffectivelyevaluateanynonlinearstress-strainbehaviorwhichmaydevelopastheresultofcumulativedamageprocesses(forexample,microcracking)whichmaybeinfluencedbytestingmode,testingrate,processingorcompositionaleffects,microstructure,orenvironmentalinfluences.Theresultsofcompressiontestsoftestspecimensfabricatedtostandardizeddimensionsfromaparticularmaterialorselectedportionsofapart,orboth,maynottotallyrepresentthestrengthanddeformationpropertiesintheentire,full-sizeproductoritsin-servicebehaviorindifferentenvironments.Forqualitycontrolpurposes,resultsderivedfromstandardizedcompressivetestspecimensmaybeconsideredindicativeoftheresponseofthematerialfromwhichtheyweretakenforgivenprimaryprocessingconditionsandpost-processingheattreatments.1.1Thistestmethodcoversthedeterminationofcompressivestrengthincludingstress-strainbehavior,undermonotonicuniaxialloadingofadvancedceramicsatambienttemperature.Thistestmethodisrestrictedtospecfictestspecimengeometries.Inaddition,testspecimenfabricationmethods,testingmodes(loadordisplacement),testingrates(loadrate,stressrate,displacementrate,orstrainrate),allowablebending,anddatacollectionandreportingproceduresareaddressed.Compressivestrengthasusedinthistestmethodreferstothecompressivestrengthobtainedundermonotonicuniaxialloading.Monotonicloadingreferstoatestconductedataconstantrateinacontinuousfashion,withnoreversalsfromtestinitiationtofinalfracture.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.1.3Thistestmethodisintendedprimarilyforusewithadvancedceramicsthatmacroscopicallyexhibitisotropic,homogeneous,continuousbehavior.Whilethistestmethodisintendedforuseonmonolithicadvancedceramics,certainwhisker-orparticle-reinforcedcompositeceramicsaswellascertaindiscontinuousfiber-reinforcedcompositeceramicsmayalsomeetthesemacroscopicbehaviorassumptions.Generally,continuousfiberceramiccomposites(CFCCs)donotmacroscopicallyexhibitisotropic,homogeneous,continuousbehavior,andapplicationofthistestmethodtothesematerialsisnotrecommended.1.4ValuesexpressedinthistestmethodareinaccordancewiththeInternationalSystemofUnits(SI)andPracticeE380.
【中国标准分类号】:Q32
【国际标准分类号】:81_060_30
【页数】:13P.;A4
【正文语种】: