【英文标准名称】:StandardTestMethodforStiffnessPropertiesofPlasticsasaFunctionofTemperaturebyMeansofaTorsionTest
【原文标准名称】:通过抗扭试验测定随温度变化的塑料的刚度特性的标准试验方法
【标准号】:ASTMD1043-2010
【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】:D20.10
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:Clash-Berg;modulusofrigidity;plastics;shear;torsion;Modulusofrigidity;Rigidplastics;Stiffness--plastics;Torsiontesting--plastics;NumberCode83.080.01(Plastingeneral)
【摘要】:Thepropertymeasuredbythistestistheapparentmodulusofrigidity,G,sometimescalledtheapparentshearmodulusofelasticity.Itisimportanttonotethatthispropertyisnotthesameasthemodulusofelasticity,E,measuredintension,flexure,orcompression.TherelationshipbetweenthesepropertiesisshowninAnnexA1.Themeasuredmodulusofrigidityistermedx201C;apparentx201D;sinceitisthevalueobtainedbymeasuringtheangulardeflectionoccurringwhenthespecimenissubjectedtoanappliedtorque.Sinceitispossiblethatthespecimenwillbedeflectedbeyonditselasticlimit,thecalculatedvaluewillnotalwaysrepresentthetruemodulusofrigiditywithintheelasticlimitofthematerial.Inaddition,thevalueobtainedbythistestmethodwillalsobeaffectedbythecreepcharacteristicsofthematerial,sincetheloadapplicationtimeisarbitrarilyfixed.Formanymaterials,itispossiblethatthereisaspecificationthatrequirestheuseofthistestmethod,butwithsomeproceduralmodificationsthattakeprecedencewhenadheringtothespecification.Therefore,itisadvisabletorefertothatmaterialspecificationbeforeusingthistestmethod.Table1inClassificationD4000liststhecurrentASTMmaterialstandards.Thistestmethodisusefulfordeterminingtherelativechangesinstiffnessoverawiderangeoftemperatures.1.1Thistestmethodcoversthedeterminationofthestiffnesscharacteristicsofplasticsoverawidetemperaturerangebydirectmeasurementoftheapparentmodulusofrigidity.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Note18212;ThistestmethodandISO458-1andISO458-2addressthesamesubjectmatter,butdifferintechnicalcontent.
【中国标准分类号】:G31
【国际标准分类号】:
【页数】:11P.;A4
【正文语种】:英语