【英文标准名称】:StandardTestMethodforMeasuringShearPropertiesofStructuralAdhesivesbytheModified-RailTest
【原文标准名称】:用变形钢轨试验测定结构胶粘剂的剪切特性的试验方法
【标准号】:ASTMD4027-1998(2004)
【标准状态】:现行
【国别】:
【发布日期】:1998
【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】:D14.70
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:试验;建筑;剪切强度;特性;胶粘剂;测量
【英文主题词】:modifiedrail;shear;shearmodulus;shearstrength;strain
【摘要】:Structuraldesignbasedonstrengthofmaterialsprinciplesorthetheoryofelasticityrequiresknowledgeofthemechanicalpropertiesofthestructuralcomponents,includingadhesives.Bythenatureoftheiruse,themostimportantadhesivepropertiesareshearmodulusandshearstrength.Atorsiontest,suchasdescribedinTestMethodE229,istheoreticallythemostaccuratemethodformeasuringadhesiveshearproperties.Itis,however,impracticalinmanysituations.Forexample,certainmaterialsofconstructionarenotreadilyadaptabletofabricatingthethin-walledcylindersusedasadherendsinthetorsiontest.Themodified-railtestdoesnothavethisdisadvantage.Twoundesirableconditionsoccurinthemodified-railtestspecimensthatdonotoccurinbutt-joinedcylinders;nonuniformshear-stressdistributionalongthejoint,andtheadditionofsomeundefinedcombinationoftensionandcompressionstressestotheshearstressatagivenlocationinthejoint.Themodified-railsheartoolminimizesbutdoesnoteliminatetheseundesirableeffects.Shearmodulus,strength,andotherpropertiesaremeasuredbythemodified-railmethod.1.1Thistestmethoddescribesequipmentandprocedurestomeasuretheshearmodulusandshearstrengthofadhesivelayersbetweenrigidadherends.Theequipmentmayalsobeusedfordeterminingtheadhesive''sshearcreepcompliance,theeffectsofstrainhistorysuchascyclicloadinguponshearproperties,andafailurecriteriaforbiaxialstressconditionssuchasshearplustensionandshearpluscompression.1.2High-densitywoodshallbethepreferredsubstrate.Thepracticalupperlimitontheshearmodulusthatcanbemeasuredisdeterminedbytheshearmodulusoftheadherendsandbythestrainmeasuringdevice.Thus,thepracticallimitofadhesiveshearmodulusthatcanbemeasuredusinghigh-densitywoodadherendsisabout690MPa(1105psi).Note18212;Wood-basecomposites,metal,plastic,reinforcedplastics,andothercommonconstructionmaterialsmayalsobeusedforadherends.1.3Therangeofspecimendimensionsthatcanbetestedare:width1.59to12.70mm(0.0625to0.500in.),length102to203mm(4to8in.),andadherendthickness13to25mm(0.50to1.00in.).Thestandardspecimendimensionsshallbe:width3.18mm(0.125in.),length203mm(8in.),andadherendthickness19mm(0.75in.).Bondlinethicknessesfrom0.15to3.18mm(0.006to0.125in.)maybetested.1.4ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:G38
【国际标准分类号】:
【页数】:8P.;A4
【正文语种】:

标准名称：	切菜机型式与主要参数
中标分类：	食品 >> 食品加工机械 >> 其他食品加工机械
替代情况：	被SB/T 10552-2009代替
发布部门：	中华人民共和国商业部
发布日期：	1985-11-01
实施日期：	1985-12-01
首发日期：
作废日期：	2010-07-01
提出单位：	中华人民共和国商业部科技司
归口单位：	北京市服务机械研究所
起草单位：	黑龙江商学院
出版日期：	1985-12-01
页数：	3页

本标准适用于加工蔬菜用各种切菜机.

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