ASTM E143-2002 室温下剪切模量的标准试验方法
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【英文标准名称】:StandardTestMethodforShearModulusatRoomTemperature
【原文标准名称】:室温下剪切模量的标准试验方法
【标准号】:ASTME143-2002
【标准状态】:现行
【国别】:
【发布日期】:2002
【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】:E28.04
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:剪切模量;试验
【英文主题词】:shearmodulus;stress-straindiagram;torque-twistdiagram
【摘要】:ShearmodulusisamaterialpropertyusefulincalculatingcomplianceofstructuralmaterialsintorsionprovidedtheyfollowHooke’law,thatis,theangleoftwistisproportionaltotheappliedtorque.Examplesoftheuseofshearmodulusareinthedesignofrotatingshaftsandhelicalcompressionsprings.Note38212;Formaterialsthatfollownonlinearelasticstress-strainbehavior,thevalueoftangentorchordshearmodulusisusefulforestimatingthechangeintorsionalstraintocorrespondingstressforaspecifiedstressorstress-range,respectively.Suchdeterminationsare,however,outsidethescopeofthisstandard.(SeeforexampleRef(1).)3Theproceduralstepsandprecisionoftheapparatusandthetestspecimensshouldbeappropriatetotheshapeandthematerialtype,sincethemethodappliestoawidevarietyofmaterialsandsizes.Precisedeterminationofshearmodulusdependsonthenumerousvariablesthatmayaffectsuchdeterminations.5.3.1Thesefactorsincludecharacteristicsofthespecimensuchasresidualstress,concentricity,wallthicknessinthecaseoftubes,deviationfromnominalvalue,previousstrainhistoryandspecimendimension.5.3.2Testingconditionsthatinfluencetheresultsinclude:axialpositionofthespecimen,temperatureandtemperaturevariations,andmaintenanceoftheapparatus.5.3.3Interpretationofdataalsoinfluencesresults.1.1Thistestmethodcoversthedeterminationofshearmodulusofstructuralmaterials.Thistestmethodislimitedtomaterialsinwhich,andtostressesatwhich,creepisnegligiblecomparedtothestrainproducedimmediatelyuponloading.Elasticpropertiessuchasshearmodulus,Young'smodulus,andPoisson'sratioarenotdeterminedroutinelyandaregenerallynotspecifiedinmaterialsspecifications.Precisionandbiasstatementsforthesetestmethodsarethereforenotavailable.1.2Valuesstatedininch-poundunitsaretoberegardedasthestandard.SIunitsareprovidedforinformationonly.1.3ttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:H23
【国际标准分类号】:77_040_10
【页数】:5P.;A4
【正文语种】:
【原文标准名称】:室温下剪切模量的标准试验方法
【标准号】:ASTME143-2002
【标准状态】:现行
【国别】:
【发布日期】:2002
【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】:E28.04
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:剪切模量;试验
【英文主题词】:shearmodulus;stress-straindiagram;torque-twistdiagram
【摘要】:ShearmodulusisamaterialpropertyusefulincalculatingcomplianceofstructuralmaterialsintorsionprovidedtheyfollowHooke’law,thatis,theangleoftwistisproportionaltotheappliedtorque.Examplesoftheuseofshearmodulusareinthedesignofrotatingshaftsandhelicalcompressionsprings.Note38212;Formaterialsthatfollownonlinearelasticstress-strainbehavior,thevalueoftangentorchordshearmodulusisusefulforestimatingthechangeintorsionalstraintocorrespondingstressforaspecifiedstressorstress-range,respectively.Suchdeterminationsare,however,outsidethescopeofthisstandard.(SeeforexampleRef(1).)3Theproceduralstepsandprecisionoftheapparatusandthetestspecimensshouldbeappropriatetotheshapeandthematerialtype,sincethemethodappliestoawidevarietyofmaterialsandsizes.Precisedeterminationofshearmodulusdependsonthenumerousvariablesthatmayaffectsuchdeterminations.5.3.1Thesefactorsincludecharacteristicsofthespecimensuchasresidualstress,concentricity,wallthicknessinthecaseoftubes,deviationfromnominalvalue,previousstrainhistoryandspecimendimension.5.3.2Testingconditionsthatinfluencetheresultsinclude:axialpositionofthespecimen,temperatureandtemperaturevariations,andmaintenanceoftheapparatus.5.3.3Interpretationofdataalsoinfluencesresults.1.1Thistestmethodcoversthedeterminationofshearmodulusofstructuralmaterials.Thistestmethodislimitedtomaterialsinwhich,andtostressesatwhich,creepisnegligiblecomparedtothestrainproducedimmediatelyuponloading.Elasticpropertiessuchasshearmodulus,Young'smodulus,andPoisson'sratioarenotdeterminedroutinelyandaregenerallynotspecifiedinmaterialsspecifications.Precisionandbiasstatementsforthesetestmethodsarethereforenotavailable.1.2Valuesstatedininch-poundunitsaretoberegardedasthestandard.SIunitsareprovidedforinformationonly.1.3ttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:H23
【国际标准分类号】:77_040_10
【页数】:5P.;A4
【正文语种】:
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