Product Code:SAE J2718
Title:Test for Tire Quasi-Static Longitudinal Force vs. Longitudinal Displacement and Quasi-Static Lateral Froce vs. Lateral Displacement
Issuing Committee:Vehicle Dynamics Standards Committee
Scope:This SAE Recommended Practice describes application of two closely related test procedures, which together determine the linear range longitudinal and lateral stiffnesses of a statically loaded non-rotating tire. The procedures apply to any tire so long as the equipment is properly sized to correctly conduct the measurements for the intended test tire. The data are suitable for use in determining parameters for road load models and for comparative evaluations of the measuredproperties in research and development. NOTE: Herein, road load models are models for predicting forces applied to the vehicle spindles during operation over irregular pavements. Within the context of this document, forces applied to the pavement are not considered.【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】: