GB/T 22165-2008 坚果炒货食品通则

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【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】:


Product Code:SAE J844
Title:Nonmetallic Air Brake System Tubing
Issuing Committee:Air Brake Tubing And Tube Ftg Committee
Scope:This SAE Standard covers the minimum requirements for nonmetallic tubing as manufactured for use in air brake systems. Nonreinforced products are designated type A and reinforced products type B. It is not intended to cover tubing for any portion of the system which operates below -40 degree C (-40 degrees F), above +93 degrees C (+200 degrees F), above a maximum working gage pressure of 1030 kPa (150 psi), or in an area subject to attack by battery acid. This tubing is intended for use in the brake system for connections which maintain a basically fixed relationship between components during vehicle operation. Coiled tube assemblies required for those installations where flexing occurs are covered by this document and SAE J1131 to the extent of setting minimum requirements on the essentially straight tube and tube fitting connections which are used in the construction of such assemblies.