NF P45-204-4/A1-2010 建筑工程.住宅处所中的气体装置.第4部分:技术规范.燃烧产物的疏散的特殊处理
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【英文标准名称】:Buildingwork-Gasinstallationindomesticpremises-Part4:technicalspecifications-Particulardispositionstothecombustionproductsevacuation.
【原文标准名称】:建筑工程.住宅处所中的气体装置.第4部分:技术规范.燃烧产物的疏散的特殊处理
【标准号】:NFP45-204-4/A1-2010
【标准状态】:现行
【国别】:法国
【发布日期】:2010-06-01
【实施或试行日期】:2010-06-19
【发布单位】:法国标准化协会(FR-AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:
【中国标准分类号】:Q82
【国际标准分类号】:91_140_40
【页数】:5P;A4
【正文语种】:其他
【英文标准名称】:StandardTestMethodforDeterminingFormingLimitCurves
【原文标准名称】:测定形成限制曲线的标准试验方法
【标准号】:ASTME2218-2002(2008)
【标准状态】:现行
【国别】:美国
【发布日期】:2002
【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】:E28.02
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:circlegrid;forminglimitcurve(FLC);forminglimitdiagram(FLD);limitingdomeheight(LDH);majorstrain;minorstrain;strainanalysis;Biaxialstress;Cold-rolledsteelsheet/strip--specifications;Deepdrawingsteel;Deformation--metals/allo
【摘要】:Aforminglimitcurve(FLC)definesthemaximum(limiting)strainthatagivensampleofametallicsheetcanundergoforarangeofformingconditions,suchasdeepdrawing,stretchingandbendingoveraradiusinapressanddiedrawingoperation,withoutdevelopingalocalizedzoneofthinning(localizednecking)thatwouldindicateincipientfailure.FLCscanbeobtainedempiricallybyusingalaboratoryhemisphericalpunchbiaxialstretchtestandalsoatensiontesttostrainmetalsheetspecimensfromamaterialsamplebeyondtheirelasticlimit,justpriortolocalizedneckingandfracture.Sincethiscannotbepredetermined,oneorbothsurfacesofspecimensarecoveredwithagridpatternofgagelengthsusuallyassquaresorsmalldiametercircles,byasuitablemethodsuchasscribing,photo-grid,orelectro-etching,andtheneachspecimenisformedtothepointoflocalizednecking,orfracture.Strainsinthemajor(e1)andminor(e2)directionsaremeasuredusingpointsonthegridpatternintheareaofthelocalizedneckingorfracture.Blanksofvariedwidthsareusedtoproduceawiderangeofstrainstatesintheminor(e2)direction.Themajor(e1)strainisdeterminedbythecapacityofthematerialtobestretchedinonedirectionassimultaneoussurfaceforceseitherstretch,donotchange,orcompress,themetalinthe(e2)direction.Inthetensiontestdeformationprocess,the(e2)strainsarenegativeandthemetalisnarrowedboththroughthethicknessandacrossitswidth.Thesestrainsareplottedonaforminglimitdiagram(FLD)andtheforminglimitcurve(FLC)isdrawntoconnectthehighestmeasured(e1ande2)straincombinationsthatincludegooddatapoints.Whenthereisintermixingandnocleardistinctionbetweengoodandneckeddatapoints,abestfitcurveisestablishedtofollowthemaximumgooddatapointsastheFLC.Theforminglimitisestablishedatthemaximum(e1)strainattainedpriortonecking.TheFLCdefinesthelimitofusefuldeformationinformingmetallicsheetproducts.FLCsareknowntochangewithmaterial(specificallywiththemechanicalorformabilitypropertiesdevelopedduringtheprocessingoperationsusedinmakingthematerial),andthethicknessofthesheetsample.Thestrainhardeningexponent(nvalue),definedinTestMethodE646,affectstheforminglimit.Ahighnvaluewillraisethelimitingmajorstrain(e1),allowingmorestretchunderpositive(+e2)strainconditions.Theplasticstrainratio(rvalue),definedinTestMethodE517,affectsthecapacityofamaterialtobedeepdrawn.Ahighrvaluewillmovetheminor(x2212;e2)strainintoalesssevereareatotheleftoftheFLDo,thuspermittingdeeperdrawsforagivenmajor(e1)strain.ThethicknessofthematerialwillaffecttheFLCsinceathickerspecimenhasmorevolumetorespondtotheformingprocess.ThepropertiesofthesteelsheetproductusedindeterminingtheFLCofFig.2includedthenvalueandthervalue.FLCsserveasadiagnostictoolformateria.......
【中国标准分类号】:A42
【国际标准分类号】:77_040_20
【页数】:15P.;A4
【正文语种】:英语
【英文标准名称】:StandardTestMethodforRubber-MeasurementofUnvulcanizedRheologicalPropertiesUsingRotorlessShearRheometers
【原文标准名称】:橡胶的标准试验方法.用非转动剪切流变仪测量未硫化橡胶的流变性能
【标准号】:ASTMD6204-2005
【标准状态】:作废
【国别】:美国
【发布日期】:2005
【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】:ASTM
【标准类型】:()
【标准水平】:()
【中文主题词】:流动性;生橡胶;流变性能;流变测定法
【英文主题词】:Flowproperties;Rawrubber;Rheologicalproperties;Rheometry
【摘要】:
【中国标准分类号】:G34
【国际标准分类号】:83_040_10
【页数】:6P;A4
【正文语种】:英语
