基本信息
| 标准名称： | 切削加工通用工艺守则 拉削 |
| 中标分类： |
机械 >>
加工工艺 >>
冷加工工艺 |
| 替代情况： | 被JB/T 9168.7-98代替 |
| 发布日期： | |
| 实施日期： | 2000-01-01 |
| 首发日期： | |
| 作废日期： | 1998-12-01 |
| 出版日期： | |
| 页数： | 2页 |
适用范围
没有内容
前言
没有内容
目录
没有内容
引用标准
没有内容
所属分类： 机械 加工工艺 冷加工工艺
【英文标准名称】:StandardTestMethodforStrengthofSewnorThermallyBondedSeamsofGeotextiles
【原文标准名称】:土工织物缝合或热粘结缝隙强度的标准试验方法
【标准号】:ASTMD4884-1996(2003)
【标准状态】:现行
【国别】:
【发布日期】:1996
【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】:试验;土工织物;缝隙;材料强度
【英文主题词】:geotextile;seamweld;sewnseam;thermallybondedseam
【摘要】:AsexplainedinTestMethodD4595,narrowgeotextilespecimensdemonstratethetendencytocontract(neckdown)inthegageareawhenunderstress.Thewiderwidthspecimenwillminimizethisphenomenoninseamsduringstrengthtesting.Theresultsachievedinthistestmethodcanmoreaccuratelycorrelatetotheseamstrengthvaluesanticipatedinthefield.Thistestmethodcanbeusedtomeasuretheseamstrengthofgeotextiles,andmayalsobeusedforacceptancetestingofcommercialshipmentsofgeotextiles.Whenstrengthisnotnecessarilyadesignconsiderationofseaminteraction,analternatemethodfordeterminingtheseamstrength,suchasTestMethodD1683,maybeuseddependingonthespecificationrequirements.Becausecurrentinformationaboutlaboratoryprecisionisincomplete,comparativetests,asdescribedin5.2.1,maybeadvisable.5.2.1Incaseofadisputearisingfromdifferencesinreportedtestresultswhenusingthistestmethodforacceptancetestingofcommercialshipments,thepurchaserandthesuppliershouldperformcomparativeteststodetermineifthereisastatisticalbiasbetweentheirlaboratories.Competentstatisticalassistanceisrecommendedfortheinvestigationofbias.Asaminimum,thetwopartiesshouldtakeagroupoftestspecimensfromthesamelotofgeotextile,thatutilizealikemethodofseamassemblytoachieveseaminteraction.Thespecimensshouldthenberandomlyassignedinequalnumbertoeachlaboratoryfortesting.Ifabiasisfound,eitheritscausemustbedeterminedandcorrected,orthepurchaserandthesuppliermustagreetointerpretfuturetestresultsinlightoftheknownbias.Althoughothermethodsofdeterminingseamstrengthareavailable,thistestmethod,thatmeasureswidespecimens,willmoreaccuratelycorrelatetotheanticipatedperformanceinthefield.Thistestmethodcanbeusedtohelpdetermineseamdesignengineeringforthegeotextilesbeingevaluated.1.1Thistestmethodcoverstheseamstrengthofgeotextiles.Theprimarydistinctionofthistestmethodforevaluatingseamstrengthisthewidthofthespecimen.ThisisincontrasttothemorenarrowspecimenwidthusedinthetensilegrabstrengthtestdiscussedinTestMethodD1683.1.2Thistestmethodwillprovidedatatoindicatetheseamstrengthwhichcanbeachievedforeachparticulargeotextileandseamassemblyconstruction.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Theinch-poundunitsgiveninparenthesesareprovidedforinformationonly.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:W59
【国际标准分类号】:59_080_70
【页数】:6P.;A4
【正文语种】: