【英文标准名称】:StandardTestMethodsforDeterminingSmall-StrainTensilePropertiesofGeogridsandGeotextilesbyIn-AirCyclicTensionTests
【原文标准名称】:空气中反复张力试验法测定土工格栅和土工布的小张力抗拉特性的标准试验方法
【标准号】:ASTMD7556-2010
【标准状态】:现行
【国别】:美国
【发布日期】:2010
【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】:D35.01
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:geogrid;geogridrib;geosynthetic;geotextile;indextest;tensiletest
【摘要】:TestMethodsA,B,andCprovideameansofevaluatingthetensilemodulusofgeogridsandgeotextilesforapplicationsinvolvingsmall-straincyclicloading.Thetestmethodsallowforthedeterminationofcyclictensilemodulusatdifferentlevelsofprescribedorpermanentstrain,therebyaccountingforpossiblechangesincyclictensilemoduluswithincreasingpermanentstraininthematerial.Thesetestmethodsshallbeusedforresearchtestingandtodefinepropertiesforuseinspecificdesignmethods.Incasesofdisputearisingfromdifferencesinreportedtestresultswhenusingthesetestmethodsforacceptancetestingofcommercialshipments,thepurchaserandsuppliershouldconductcomparativeteststodetermineifthereisastatisticalbiasbetweentheirlaboratories.Competentstatisticalassistanceisrecommendedfortheinvestigationofbias.Asaminimum,thetwopartiesshouldtakeagroupoftestspecimenswhichareashomogeneousaspossibleandwhicharefromalotofmaterialofthetypeinquestion.Thetestspecimensshouldthenberandomlyassignedinequalnumberstoeachlaboratoryfortesting.TheaverageresultsfromthetwolaboratoriesshouldbecomparedusingStudentx2019;st-testforunpaireddataandanacceptableprobabilitylevelchosenbythetwopartiesbeforethetestingbegan.Ifabiasisfound,eitheritscauseshallbefoundandcorrectedorthepurchaserandsuppliershallagreetointerpretfuturetestresultsinlightoftheknownbias.AllgeogridscanbetestedbyTestMethodsAorB.Somemodificationoftechniquesmaybenecessaryforagivengeogriddependinguponitsphysicalmake-up.Specialadaptationsmaybenecessarywithstronggeogrids,multiplelayeredgeogrids,orgeogridsthattendtoslipintheclampsorthosewhichtendtobedamagedbytheclamps.MostgeotextilescanbetestedbyTestMethodC.Somemodificationofclampingtechniquesmaybenecessaryforagivengeotextiledependinguponitsstructure.Specialclampingadaptationsmaybenecessarywithstronggeotextilesorgeotextilesmadefromglassfiberstopreventthemfromslippingintheclampsorbeingdamagedasaresultofbeinggrippedintheclamps.Thesetestmethodsareapplicablefortestinggeotextileseitherdryorwet.Itisusedwithaconstantrateofextensiontypetensionapparatus.Thesetestmethodsmaynotbesuitedforgeogridsandgeotextilesthatexhibitstrengthsapproximately100kN/m(600lbf/in.)duetoclampingandequipmentlimitations.Inthosecases,100mm(4in.)widthspecimensmaybesubstitutedfor200mm(8in.)widthspecimens.1.1Thesetestmethodscoverthedeterminationofsmall-straintensilepropertiesofgeogridsandgeotextilesbysubjectingwide-widthspecimenstocyclictensileloading.1.2Thesetestmethods(A,B,andC)allowforthedeterminationofsmall-straincyclictensilemodulusbythemeasurementofcyclictensileloadandelongation.1.3Thistestmethodisintendedtoprovidepropertiesfordesign.Thetestmethodwasdevelopedformechanistic-empiricalpavementdesignmethodsrequiringinputofthereinforcementtensilemodulus.Theuseofcyclicmodulusfromthistestmethodforotherapplicationsinvolvingcyclicloadingshouldbeevaluatedonacase-by-casebasis.1.4Threetestmethods(A,B,andC)areprovidedtodeterminesmall-straincyclictensilemodulusongeogridsandgeotextiles.1.4.1TestMethodA8212;TestingarelativelywidespecimenofgeogridincyclictensioninkN/m(lbf/ft).1.4.2TestMethodB8212;TestingmultiplelayersofarelativelywidespecimenofgeogridincyclictensioninkN/m(lbf/ft).1.4.3TestMethodC......
【中国标准分类号】:W59
【国际标准分类号】:59_080_40
【页数】:6P.;A4
【正文语种】:英语
基本信息
标准名称: | 金属夏比冲击断口测定方法 |
英文名称: | Metallic materials-Determinaiton of Charpy impact fracture surface |
中标分类: |
船舶 >>
船舶综合 >>
船舶用材料及其检验方法 |
ICS分类: |
冶金 >>
金属材料试验 >>
金属材料力学试验
|
替代情况: | 被GB/T 12778-2008代替 |
发布部门: | 国家技术监督局 |
发布日期: | 1991-05-11 |
实施日期: | 1992-01-01 |
首发日期: | 1991-05-11 |
作废日期: | 2008-07-01 |
主管部门: | 中国钢铁工业协会 |
归口单位: | 全国钢标准化技术委员会 |
起草单位: | 洛阳船舶材料研究所 |
出版社: | 中国标准出版社 |
出版日期: | 1900-01-01 |
页数: | 9页 |
适用范围
本标准规定了金属材料夏比冲击试样断口晶状面积和侧膨胀值的测定方法。本标准适用于测定金属材料夏比试样(10mm×10mm×55mm,缺口深2mm)断口,对其它类型的冲击试样断口,也可参照使用。
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所属分类: 船舶 船舶综合 船舶用材料及其检验方法 冶金 金属材料试验 金属材料力学试验