ZB N 92001-1986 气象仪器工作环境条件

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【英文标准名称】:TestMethodforDeterminingResidualStressesbytheHole-DrillingStrain-GageMethod
【原文标准名称】:采用钻孔应变测量法测定剩余应力的方法
【标准号】:ANSI/ASTME837-2001
【标准状态】:现行
【国别】:美国
【发布日期】:2001
【实施或试行日期】:2001-10-10
【发布单位】:美国国家标准学会(US-ANSI)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:试验;应力
【英文主题词】:testing;stress
【摘要】:ResidualStressDetermination:Thistestmethodspecifiesahole-drillingprocedurefordeterminingresidualstressprofilesnearthesurfaceofanisotropiclinearlyelasticmaterial.Thetestmethodisapplicabletoresidualstressprofiledeterminationswherein-planestressgradientsaresmall.Thestressesmayremainapproximatelyconstantwithdepth("uniform"stresses)ortheymayvarysignificantlywithdepth("non-uniform"stresses).Themeasuredworkpiecemaybe"thin"withthicknessmuchlessthanthediameterofthedrilledholeor"thick"withthicknessmuchgreaterthanthediameterofthedrilledhole.Onlyuniformstressmeasurementsarespecifiedforthinworkpieces,whilebothuniformandnon-uniformstressmeasurementsarespecifiedforthickworkpieces.StressMeasurementRange:Thehole-drillingmethodcanidentifyin-planeresidualstressesnearthemeasuredsurfaceoftheworkpiecematerial.Themethodgiveslocalizedmeasurementsthatindicatetheresidualstresseswithintheboundariesofthedrilledhole.Thistestmethodappliesincaseswherematerialbehaviorislinear-elastic.Intheory,itispossibleforlocalyieldingtooccurduetothestressconcentrationaroundthedrilledhole,forisotropic(equi-biaxial)residualstressesexceeding50%oftheyieldstress,orforshearstressesinanydirectionexceeding25%oftheyieldstress.However,inpracticeitisfoundthatsatisfactoryresultscanbeachievedprovidingtheresidualstressesdonotexceedabout60%ofthematerialyieldstress.WorkpieceDamage:Thehole-drillingmethodisoftendescribedas"semi-destructive"becausethedamagethatitcausesislocalizedandoftendoesnotsignificantlyaffecttheusefulnessoftheworkpiece.Incontrast,mostothermechanicalmethodsformeasuringresidualstressessubstantiallydestroytheworkpiece.Sinceholedrillingdoescausesomedamage,thistestmethodshouldbeappliedonlyinthosecaseseitherwheretheworkpieceisexpendable,orwheretheintroductionofasmallshallowholewillnotsignificantlyaffecttheusefulnessoftheworkpiece.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:H22
【国际标准分类号】:77_040_10
【页数】:
【正文语种】:英语

标准名称：	高效液相色谱方法通则
英文名称：	General rules for high performance liquid chromatography
中标分类：	仪器、仪表 >> 物质成分分析仪器与环境监测仪器 >> 色谱仪
发布日期：	1997-01-23
实施日期：	1997-04-01
首发日期：
作废日期：
出版日期：
页数：	9页

本通则规定了用高效液相色谱仪测定有机化合物的一般方法，适用于具有紫外-可见光、荧光和示差折光率检测器的高效液相色谱仪器。

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