QJ 2528.20-1993 大型组合弯曲模件 薄垫板
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基本信息
| 标准名称： | 大型组合弯曲模件 薄垫板 |
| 中标分类： | |
| ICS分类： | 机械制造 >> 无屑加工设备 >> 模制设备和铸造设备 |
| 发布日期： | 1993-03-30 |
| 实施日期： | 1991-08-01 |
| 首发日期： | |
| 作废日期： | |
| 出版日期： | |
| 页数： | 3页 |
适用范围
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前言
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目录
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引用标准
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所属分类： 机械制造 无屑加工设备 模制设备和铸造设备
下载地址: 点击此处下载
【英文标准名称】:StandardTestMethodforStrengthPropertiesofAdhesivesinShearbyTensionLoadingofSingle-Lap-JointLaminatedAssemblies
【原文标准名称】:用单面搭接迭层板组件的拉伸负荷测定剪切时胶粘剂强度特性的标准试验方法
【标准号】:ASTMD3165-2007
【标准状态】:现行
【国别】:
【发布日期】:2007
【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】:D14.80
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:胶粘剂;粘结强度;叠层板材;特性;拉伸负荷;测试
【英文主题词】:assemblies;bonds;laminated;lap-joints;shearstrength;single-lap;tension
【摘要】:Thistestmethodisusefulinthatthejointconfigurationcloselysimulatestheactualjointconfigurationofmanybondedassemblies.Surfacepreparationoftheadherendscanaffecttheapparentshearstrengthoftheadhesiveandcanbeoneofthevariablesunderstudy.Thistestmethodisalsousefulasanin-processqualitycontroltestforlaminatedassemblies.Inpracticethelaminatedassemblyiseithermadeoversizeandtestspecimensremovedfromitorapercentageoftheassembliesaredestructivelytested.Themisuseofstrengthvaluesobtainedfromthistestmethodasdesignallowablestressvaluesforstructuraljointscouldleadtoproductfailure,propertydamage,andhumaninjury.Theapparentshearstrengthofanadhesiveobtainedfromagivensmallsingle-lapspecimenmaydifferfromthatobtainedfromajointmadewithdifferentadherendsorbyadifferentbondingprocess.Thenormalvariationoftemperatureandmoistureintheserviceenvironmentcausestheadherendsandtheadhesivetoswellandshrink.Theadherendsandadhesivearelikelytohavedifferentthermalandmoisturecoefficientsofexpansion.4.3.1Eveninsmallspecimens,short-termenvironmentalchangescaninduceinternalstressesorchemicalchangesintheadhesivethatpermanentlyaffecttheapparentstrengthandothermechanicalpropertiesoftheadhesive.Theproblemofpredictingjointbehaviorinachangingenvironmentisevenmoredifficultifadifferenttypeofadherendisusedinalargerstructuraljointthanwasusedinthesmallspecimen.Theapparentshearstrengthmeasuredwithasingle-lapspecimenisnotsuitablefordeterminingdesignallowablestressesfordesigningstructuraljointsthatdifferinanymannerfromthejointstestedwithoutthoroughanalysisandunderstandingofthejointandadhesivebehaviors.Single-laptestsmaybeusedforcomparingandselectingadhesivesorbondingprocessesforsusceptibilitytofatigueandenvironmentalchanges,butsuchcomparisonsmustbemadewithgreatcautionsincedifferentadhesivesmayresponddifferentlyindifferentjoints.ReviewGuideD4896forfurtherdiscussionofconceptsforinterpretationofadhesive-bondedsingle-lapjointdata.1.1Thistestmethod(Note1)isintendedfordeterminingthecomparativeshearstrengthsofadhesivesinlargeareajointswhentestedonastandardsingle-lap-jointspecimenandunderspecifiedconditionsofpreparationandtesting.Adhesivesresponddifferentlyinsmallversuslargeareajoints(Note2).Note1Whilethistestmethodisintendedforuseinmetal-to-metalapplications,itmaybeusedformeasuringtheshearpropertiesofadhesivesusingplasticadherends,providedconsiderationisgiventothethicknessandrigidityoftheplasticadherends.Doublersorbondedtabsmayberequiredforplasticadherendstopreventbearingfailureintheadherends.Note2Thisvariationcanbeinfluencedbyadhesivedensity,flowcharacteristics,curerate,geltime,carriercomposition,entrappedvolatiles,volatilesreleasedduringcure,etc.andalsobycurecyclevariablesincluding:temperature,time,pressure,riseratetotemperature,cool-downrate,etc.Inadditiontotheprocessingvariablesjointsizechangesthelevelofconstraintontheadhesiveaswellastheinfluenceofinducedtensileloadsattheedgeofthejointduringmechanicalorthermalloading.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityof......
【中国标准分类号】:G39
【国际标准分类号】:83_180
【页数】:4P.;A4
【正文语种】:
【原文标准名称】:用单面搭接迭层板组件的拉伸负荷测定剪切时胶粘剂强度特性的标准试验方法
【标准号】:ASTMD3165-2007
【标准状态】:现行
【国别】:
【发布日期】:2007
【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】:D14.80
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:胶粘剂;粘结强度;叠层板材;特性;拉伸负荷;测试
【英文主题词】:assemblies;bonds;laminated;lap-joints;shearstrength;single-lap;tension
【摘要】:Thistestmethodisusefulinthatthejointconfigurationcloselysimulatestheactualjointconfigurationofmanybondedassemblies.Surfacepreparationoftheadherendscanaffecttheapparentshearstrengthoftheadhesiveandcanbeoneofthevariablesunderstudy.Thistestmethodisalsousefulasanin-processqualitycontroltestforlaminatedassemblies.Inpracticethelaminatedassemblyiseithermadeoversizeandtestspecimensremovedfromitorapercentageoftheassembliesaredestructivelytested.Themisuseofstrengthvaluesobtainedfromthistestmethodasdesignallowablestressvaluesforstructuraljointscouldleadtoproductfailure,propertydamage,andhumaninjury.Theapparentshearstrengthofanadhesiveobtainedfromagivensmallsingle-lapspecimenmaydifferfromthatobtainedfromajointmadewithdifferentadherendsorbyadifferentbondingprocess.Thenormalvariationoftemperatureandmoistureintheserviceenvironmentcausestheadherendsandtheadhesivetoswellandshrink.Theadherendsandadhesivearelikelytohavedifferentthermalandmoisturecoefficientsofexpansion.4.3.1Eveninsmallspecimens,short-termenvironmentalchangescaninduceinternalstressesorchemicalchangesintheadhesivethatpermanentlyaffecttheapparentstrengthandothermechanicalpropertiesoftheadhesive.Theproblemofpredictingjointbehaviorinachangingenvironmentisevenmoredifficultifadifferenttypeofadherendisusedinalargerstructuraljointthanwasusedinthesmallspecimen.Theapparentshearstrengthmeasuredwithasingle-lapspecimenisnotsuitablefordeterminingdesignallowablestressesfordesigningstructuraljointsthatdifferinanymannerfromthejointstestedwithoutthoroughanalysisandunderstandingofthejointandadhesivebehaviors.Single-laptestsmaybeusedforcomparingandselectingadhesivesorbondingprocessesforsusceptibilitytofatigueandenvironmentalchanges,butsuchcomparisonsmustbemadewithgreatcautionsincedifferentadhesivesmayresponddifferentlyindifferentjoints.ReviewGuideD4896forfurtherdiscussionofconceptsforinterpretationofadhesive-bondedsingle-lapjointdata.1.1Thistestmethod(Note1)isintendedfordeterminingthecomparativeshearstrengthsofadhesivesinlargeareajointswhentestedonastandardsingle-lap-jointspecimenandunderspecifiedconditionsofpreparationandtesting.Adhesivesresponddifferentlyinsmallversuslargeareajoints(Note2).Note1Whilethistestmethodisintendedforuseinmetal-to-metalapplications,itmaybeusedformeasuringtheshearpropertiesofadhesivesusingplasticadherends,providedconsiderationisgiventothethicknessandrigidityoftheplasticadherends.Doublersorbondedtabsmayberequiredforplasticadherendstopreventbearingfailureintheadherends.Note2Thisvariationcanbeinfluencedbyadhesivedensity,flowcharacteristics,curerate,geltime,carriercomposition,entrappedvolatiles,volatilesreleasedduringcure,etc.andalsobycurecyclevariablesincluding:temperature,time,pressure,riseratetotemperature,cool-downrate,etc.Inadditiontotheprocessingvariablesjointsizechangesthelevelofconstraintontheadhesiveaswellastheinfluenceofinducedtensileloadsattheedgeofthejointduringmechanicalorthermalloading.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityof......
【中国标准分类号】:G39
【国际标准分类号】:83_180
【页数】:4P.;A4
【正文语种】:
