【英文标准名称】:StandardTestMethodforStrengthPropertiesofAdhesiveBondsinShearbyCompressionLoading
【原文标准名称】:压缩荷载法测定胶粘剂的抗剪切强度特性用标准试验方法
【标准号】:ASTMD905-2003
【标准状态】:现行
【国别】:
【发布日期】:2003
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:D14.30
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:胶粘剂;粘结力;压力荷载;剪切强度;试验;粘结强度
【英文主题词】:adhesive;bond;compression;compressionloading;shear;strengthproperties
【摘要】:Itcannotbeassumedthatthistestmethodmeasuresthetrueshearstrengthoftheadhesivebond.Manyfactorsinterfereorbiasthemeasurementincludingthestrengthofthewood,thespecimen,thesheartooldesignsthemselves,andtherateofloading.4.1.1Woodfailureisverycommoninjointsmadewithstrongadhesives.Althoughhighwoodfailureisnormallydesired,whenitoccursthemeasuredstrengthislowerthanthetrueadhesivebondstrength.4.1.2Stressconcentrationsatthenotchesofthespecimentendtolowerthemeasuredstrength.Inasimilartestfortheshearstrengthofsolidwood,TestMethodsD143,theseeffectsareselfcorrectingsothatthemeasuredstrengthisclosetothetrueshearstrengthofthewood.Byanalogythesamemaybetrueinthistestmethod,however,otherfactorsarealsoinvolvedandmayaltertherelationship.4.1.3Therateofloadingaffectsthestrengthofanadhesivebondaccordingtotheadhesive’rheologicalproperties.Themoreviscoelasticorplastictheadhesive,thegreatereffect.Thermosettingadhesiveslikeurea-andphenol-formaldehydeareelastic.Theirbondstrengthscanbemeasuredoverarangeofloadingratefrom0.038to1.27cm/min(0.015to0.5in./min)withnoapparentaffect.Thermoplasticadhesiveslikepolyvinylacetate,hotmelts,andelastomer-basedadhesivesexhibitabroadrangeofelastic,viscoelastic,andplasticbehaviors.Theirbondstrengthswillbeaffectedtovaryingdegreesbychangingtheloadingrate.Generally,increasingtherate,increasesthemeasuredstrength.Thistestmethodissuitableforproductresearchanddevelopment,qualifyingadhesivesinaccordancewithcertainproductorperformancespecifications,andmonitoringbondingprocesscontrol.Thistestmethodmaybesuitableforcomparingandselectingadhesives,however,suchcomparisonsmustbemadewithcautionsincethemeasuredstrengthofsomeadhesivesmaybedifferentindifferenttypesofjoints.Strengthvaluesobtainedbythistestmethodarenotsuitableasdesignshearstrengthsvalueswithoutadjustmentbycertainengineeringdesignfactors.1.1Thistestmethodcoversthedeterminationofthecomparativeshearstrengthsofadhesivebondsusedforbondingwoodandothersimilarmaterials,whentestedonastandardspecimenunderspecifiedconditionsofpreparation,conditioning,andloadingincompression.Thistestmethodisintendedprimarilyasanevaluationofadhesivesforwood.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareprovidedforinformationpurposesonly.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:G38
【国际标准分类号】:
【页数】:5P.;A4
【正文语种】:
基本信息
| 标准名称： | 农用轮式拖拉机前置动力输出轴 |
| 英文名称： | Front-mounted power take-off for agricultural wheeled tractors |
| 中标分类： |
车辆 >>
拖拉机 >>
传动系统 |
| ICS分类： |
农业 >>
农业机械、工具和设备 >>
农业拖拉机和牵引车辆
|
| 替代情况： | 被GB/T 10916-2003代替 |
| 发布日期： | 1989-03-31 |
| 实施日期： | 1990-01-01 |
| 首发日期： | 1900-01-01 |
| 作废日期： | 2003-08-01 |
| 起草单位： | 洛阳拖拉机研究所 |
| 出版日期： | 1900-01-01 |
| 页数： | 5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： 车辆 拖拉机 传动系统 农业 农业机械 工具和设备 农业拖拉机和牵引车辆