DIN 45921 T.107-1983 电子元件质量评定协调体系.分规范:小负荷非线绕固定电阻.用于较高要求的金属层电阻(CECC40101-017)

上一篇: DIN 45921 T.106-1983 电子元件质量评定协调体系.分规范:小负荷非线绕固定电阻.较高要求用偏差小和失误率小的碳膜电阻(CECC40101-016)
下一篇: DIN 45921 T.109-1983 电子元件质量评定协调体系.分规范:小负荷非绕线固定电阻.用于较高要求的金属瓷釉电阻(CECC40101-018)

【英文标准名称】:FerriticMalleableIronCastings(Metric)
【原文标准名称】:米制可锻铁素体钢铸件
【标准号】:ASTMA47M-1990
【标准状态】:作废
【国别】:美国
【发布日期】:1990
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:ASTM
【标准类型】:()
【标准水平】:()
【中文主题词】:铸件;铁合金;铁酸盐;铁
【英文主题词】:castings;iron;ferro-alloys;ferrites
【摘要】:
【中国标准分类号】:J31
【国际标准分类号】:77_140_80
【页数】:5P;A4
【正文语种】:英语


【英文标准名称】:Advancedtechnicalceramics-Mechanicalpropertiesofmonolithicceramicsatroomtemperature-Part2:DeterminationofYoung’smodulus,shearmodulusandPoisson’sratio
【原文标准名称】:高级工业陶瓷.室温下单片陶瓷的机械特性.第2部分:杨氏模量、剪切模量和泊松比测定
【标准号】:BSEN843-2-2006
【标准状态】:现行
【国别】:英国
【发布日期】:2007-01-31
【实施或试行日期】:2007-01-31
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:高级工业陶瓷;环境温度;恒定的;定义;测定;环境试验;硬度测量;材料测试;机械特性;机械测试;弹性模量;整体材料;泊松比;剪切模量;试验报告;测试;杨氏模量
【英文主题词】:Advancedtechnicalceramics;Ambienttemperatures;Constant;Definition;Definitions;Determination;Elasticmodulus;Environmentaltesting;Hardnessmeasurement;Materialstesting;Mechanicalproperties;Mechanicaltesting;Modulusofelasticity;Monolithicmaterials;Poissonratio;Poisson'sratio;Shearmodulus;Testreports;Testing;Young'smodulus
【摘要】:ThispartofEN843specifiesmethodsfordeterminingtheelasticmoduli,specificallyYoung’smodulus,shearmodulusandPoisson’sratio,ofadvancedmonolithictechnicalceramicsatroomtemperature.ThisEuropeanStandardprescribesfouralternativemethodsfordeterminingsomeorallofthesethreeparameters:AThedeterminationofYoung’smodulusbystaticflexureofathinbeaminthree-orfour-pointflexure.BThedeterminationofYoung’smodulusbyforcedlongitudinalresonance,orYoung’smodulus,shearmodulusandPoisson’sratiobyforcedflexuralandtorsionalresonance,ofathinbeam.CThedeterminationofYoung’smodulus,shearmodulusandPoisson’sratiofromthetime-of-flightofanultrasonicpulse.DThedeterminationofYoung’smodulusfromthefundamentalnaturalfrequencyofastruckbar(impulseexcitationmethod).Allthetestmethodsassumetheuseofhomogeneoustestpiecesoflinearelasticmaterials.NOTE1Notallceramicmaterialsareequallyandlinearlyelasticintensionandcompression,suchassomeporousmaterialsandsomepiezoelectricmaterials.WiththeexceptionofMethodC,thetestassumesthatthetestpiecehasisotropicelasticproperties.MethodCmaybeusedtodeterminethedegreeofanisotropybytestingindifferentorientations.NOTE2Anultrasonicmethodfordealingwithanisotropicmaterials(ceramicmatrixcomposites)canbefoundinENV14186[1].AnalternativetoMethodDforisotropicmaterialsusingdisctestpiecesisgiveninAnnexA.NOTE3AthighporositylevelsallofthemethodsexceptMethodCmaybecomeinappropriate.Themethodsareonlysuitableforamaximumgrainsize(seeEN623-3),excludingdeliberatelyaddedwhiskers,oflessthan10%oftheminimumdimensionofthetestpiece.NOTE4ThedifferentmethodsgiveninthisEuropeanStandardcanproduceslightlydifferentresultsonthesamematerialowingtodifferencesbetweenquasi-isothermalquasi-staticandquasi-adiabaticdynamicconditions.Inaddition,thecalculationroutinesfordifferentmethodshavedifferentoriginsanddifferentpotentialuncertaintieswhichhavenotbeenrigorouslyevaluatedinproducingthisEuropeanStandard.SomeinformationisgiveninAnnexB(seealsoreference[2]).
【中国标准分类号】:Q32
【国际标准分类号】:81_060_30
【页数】:42P.;A4
【正文语种】:英语