【英文标准名称】:Measuringmethodsandtestingproceduresforelectromechanicalcomponents;test22a:capacitance
【原文标准名称】:机电元件的测量和试验方法；试验22a；电容
【标准号】:DIN41640-53-1980
【标准状态】:作废
【国别】:德国
【发布日期】:1980-04
【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】:试验;电气工程;规范(审批);元部件
【英文主题词】:electricalengineering;components;testing;specification(approval)
【摘要】:
【中国标准分类号】:K10
【国际标准分类号】:1420
【页数】:2P;A4
【正文语种】:德语


【英文标准名称】:StandardTestMethodsforStructuralPanelsinShearThrough-the-Thickness
【原文标准名称】:胶合板纵向剪切的标准试验方法
【标准号】:ASTMD2719-1989(2007)
【标准状态】:现行
【国别】:
【发布日期】:1989
【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】:D07.03
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:胶合板;施工材料;建筑;剪切强度;木材;试验
【英文主题词】:shear;sheartest;shearthrough-the-thickness;structuralpanels
【摘要】:Thestrengthandmodulusofrigidityofstructuralpanelsinshearthrough-the-thicknessobtainedbythesetestmethodsarerequiredfortherigorousdesignofmanylumber-panelstructuralcomponentssuchastrusseswithpanelgussets,boxbeams,foldedplateroofs,andspaceplanestructures,aswellasfloorandroofdiaphragms,andshearwalls.Thesepropertiesareofsecondaryimportanceintypicalroofdeckandsheathingapplications,andincratesandshippingcontainers.Veneerproducedbyslicingorrotarypeelingmaycontainfinechecksorseparationsparalleltothegrainontheknifesideoftheveneerthatareproducedastheknifeisforcedthroughthewood.Thesechecksaretermedx201C;knifechecksx201D;todistinguishthemfromoccasionalchecksthatmaybeformedontheoppositesideoftheveneerbyforcesatthecompressionbar,andfromcheckscausedbydrying.Averagedepthofknifecheckshasbeenfoundtostronglyinfluenceshearpropertiesinplywoodpanelsandmaybeofsignificanceinveneerincorporatedincompositepanels.Measurementofdepthofknifechecksisrecommendedinthesetestmethods.Tocontrolordefineothervariablesinfluencingshearproperties,thesetestmethodsrequiredeterminationofmoisturecontentandelapsedtimetofailure.Theconditioningoftestmaterialincontrolledatmosphereanddeterminationofspecificgravityarerecommended.1.1Thesetestmethodsdeterminetheshearthrough-the-thicknesspropertiesofstructuralpanelsassociatedwithsheardistortionofthemajoraxis.Structuralpanelsinuseincludeplywood,waferboard,orientedstrandboard,andcompositesofveneerandofwoodbasedlayers.Threetestmethodsareincludedwhichdiffersomewhatintheirapplication:TestMethodSectionA.SmallPanelShearTest5B.LargePanelShearTest6C.TwoRailShearTest7