DIN V ENV 41213-1-1993 信息系统的通讯.A模式"Telnet"基础级虚拟终端.第1部分:虚拟终端:服务的定义

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【英文标准名称】:Informationsystemsinterconnection;virtualterminal,basicclass,A-mode"Telnet";part1:virtualterminalservice;englishversionENV41213-1:1992
【原文标准名称】:信息系统的通讯.A模式"Telnet"基础级虚拟终端.第1部分:虚拟终端:服务的定义
【标准号】:DINVENV41213-1-1993
【标准状态】:作废
【国别】:德国
【发布日期】:1993-02
【实施或试行日期】:
【发布单位】:德国标准化学会(DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:数据通信;电信网络;虚拟终端;虚拟单元;数据处理;数据传送;定义;数据网络;情报系统;计算机终端;包交换网络;表示层;层;开式系统互连;通信系统;协议;终端;网络;传播学;服务设施;传输协议
【英文主题词】:
【摘要】:
【中国标准分类号】:L78
【国际标准分类号】:35_180
【页数】:15P;A4
【正文语种】:德语


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【英文标准名称】:StandardTestMethodforPlane-Strain(Chevron-Notch)FractureToughnessofMetallicMaterials
【原文标准名称】:金属材料水平变形断裂强度的标准试验方法
【标准号】:ASTME1304-1997(2008)e1
【标准状态】:现行
【国别】:美国
【发布日期】:1997
【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】:E08.02
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:Calibration--loadtestingmachines;Chevronnotchedspecimen;Cracking--crackgrowth;Fracturetesting--metals/alloys;Loadingtests--metals/alloys;Metalsandmetallicmaterials;Plane-straintesting;Smoothcrackgrowthdata;Tensileproperties/testing-
【摘要】:Thefracturetoughnessdeterminedbythistestmethodcharacterizestheresistanceofamaterialtofracturebyaslowlyadvancingsteady-statecrack(see3.2.5)inaneutralenvironmentunderseveretensileconstraint.Thestateofstressnearthecrackfrontapproachesplanestrain,andthecrack-tipplasticregionissmallcomparedwiththecracksizeandspecimendimensionsintheconstraintdirection.AKIvorKIvjvaluemaybeusedtoestimatetherelationbetweenfailurestressanddefectsizewhentheconditionsdescribedabovewouldbeexpected,althoughtherelationshipmaydifferfromthatobtainedfromaKIcvalue(seeNote1).BackgroundinformationconcerningthebasisfordevelopmentofthistestmethodintermsoflinearelasticfracturemechanicsmaybefoundinRefs(1-15).TheKIv,KIvj,orKIvMvalueofagivenmaterialcanbeafunctionoftestingspeed(strainrate)andtemperature.Furthermore,cyclicforcescancausecrackextensionatKIvalueslessthanKIv,andcrackextensioncanbeincreasedbythepresenceofanaggressiveenvironment.Therefore,applicationofKIvinthedesignofservicecomponentsshouldbemadewithanawarenessofdifferencesthatmayexistbetweenthelaboratorytestsandfieldconditions.Plane-strainfracturetoughnesstestingisunusualinthattherecanbenoadvanceassurancethatavalidKIv,KIvj,orKIvMwillbedeterminedinaparticulartest.Therefore,itisessentialthatallthecriteriaconcerningthevalidityofresultsbecarefullyconsideredasdescribedherein.Thistestmethodcanservethefollowingpurposes:Toestablishtheeffectsofmetallurgicalvariablessuchascompositionorheattreatment,oroffabricatingoperationssuchasweldingorforming,onthefracturetoughnessofneworexistingmaterials.Forspecificationsofacceptanceandmanufacturingqualitycontrol,butonlywhenthereisasoundbasisforspecificationofminimumKIv,KIvj,orKIvMvalues,andthenonlyifthedimensionsoftheproductaresufficienttoprovidespecimensofthesizerequiredforvalidKIvdetermination(5).ThespecificationofKIvvaluesinrelationtoaparticularapplicationshouldsignifythatafracturecontrolstudyhasbeenconductedonthecomponentinrelationtotheexpectedhistoryofloadingandenvironment,andinrelationtothesensitivityandreliabilityofthecrackdetectionproceduresthataretobeappliedpriortoserviceandsubsequentlyduringtheanticipatedlife.Toprovidehighspatialresolutioninmeasuringplanestrainfracturetoughnessvariationsinparentpiecesofmaterial(14).Note28212;Thehighspatialre.......
【中国标准分类号】:H22
【国际标准分类号】:77_040_10
【页数】:11P.;A4
【正文语种】:英语


【英文标准名称】:Assemblytoolsforscrewsandnuts.Open-enddoubleheadengineerswrenches.Lengths.Thicknessofheads.
【原文标准名称】:螺钉螺母装配工具.双开口扳手.长度.端头的厚度
【标准号】:NFE74-310-1991
【标准状态】:作废
【国别】:法国
【发布日期】:1991-12-01
【实施或试行日期】:1991-12-05
【发布单位】:法国标准化协会(AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:
【中国标准分类号】:J47
【国际标准分类号】:25_140_30
【页数】:4P;A4
【正文语种】:其他