基本信息
| 标准名称： | 硒中碳量的测定(燃烧电导法) |
| 英文名称： | Determination of carbon content in selenium--Combustion conductometric titration method |
| 中标分类： |
冶金 >>
金属化学分析方法 >>
半金属及半导体材料分析方法 |
| ICS分类： |
冶金 >>
金属材料试验 >>
金属材料化学分析
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| 替代情况： | 原标准号GB/T 2123-1980 |
| 发布日期： | |
| 实施日期： | 1993-03-01 |
| 首发日期： | |
| 作废日期： | |
| 出版日期： | |
| 页数： | 2页 |
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所属分类： 冶金 金属化学分析方法 半金属及半导体材料分析方法 冶金 金属材料试验 金属材料化学分析
【英文标准名称】:StandardTestMethodforFlexureCreepofSandwichConstructions
【原文标准名称】:加层结构挠曲蠕变的标准试验方法
【标准号】:ASTMC480/C480M-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【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】:D30.09
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:bendingstress;corestress;creep;creepdeflection;facingstress;sandwich;sandwichconstruction;sandwichdeflection;Creep;Creepdeflection;Flexuraltesting--buildingmaterials;Sandwichcorematerials
【摘要】:Thedeterminationofthecreeprateprovidesinformationonthebehaviorofsandwichconstructionsunderconstantappliedforce.Creepisdefinedasdeflectionunderconstantforceoveraperiodoftimebeyondtheinitialdeformationasaresultoftheapplicationoftheforce.Deflectiondataobtainedfromthistestmethodcanbeplottedagainsttime,andacreepratedetermined.Byusingstandardspecimenconstructionsandconstantloading,thetestmethodmayalsobeusedtoevaluatecreepbehaviorofsandwichpanelcore-to-facingadhesives.Thistestmethodprovidesastandardmethodofobtainingflexurecreepofsandwichconstructionsforqualitycontrol,acceptancespecificationtesting,andresearchanddevelopment.Factorsthatinfluencethesandwichconstructioncreepresponseandshallthereforebereportedincludethefollowing:facingmaterial,corematerial,adhesivematerial,methodsofmaterialfabrication,facingstackingsequenceandoverallthickness,coregeometry(cellsize),coredensity,corethickness,adhesivethickness,specimengeometry,specimenpreparation,specimenconditioning,environmentoftesting,specimenalignment,loadingprocedure,speedoftesting,facingvoidcontent,adhesivevoidcontent,andfacingvolumepercentreinforcement.Further,facingandcore-to-facingstrengthandcreepresponsemaybedifferentbetweenprecured/bondedandco-curedfacesheetsofthesamematerial.1.1Thistestmethodcoversthedeterminationofthecreepcharacteristicsandcreeprateofflatsandwichconstructionsloadedinflexure,atanydesiredtemperature.Permissiblecorematerialformsincludethosewithcontinuousbondingsurfaces(suchasbalsawoodandfoams)aswellasthosewithdiscontinuousbondingsurfaces(suchashoneycomb).1.2ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Withinthetexttheinch-poundunitsareshowninbrackets.ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Q23
【国际标准分类号】:83_120
【页数】:5P.;A4
【正文语种】:英语