DIN V 25403-6-1995 核燃料的处理和操作时的临界安全性.第6节:钚-硝酸盐-轻水混合物的临界数据

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【英文标准名称】:StandardSpecificationforFacedRigidCellularPolyisocyanurateThermalInsulationBoard
【原文标准名称】:贴面硬质泡沫聚异氰尿酸酯隔热板的标准规范
【标准号】:ASTMC1289a-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】:绝缘材料;塑料绝缘;隔热
【英文主题词】:Insulatingmaterials;Plasticinsulations;Thermalinsulation
【摘要】:
【中国标准分类号】:G33
【国际标准分类号】:27_220
【页数】:10P;A4
【正文语种】:英语


【英文标准名称】:Fibre-reinforcedplasticcomposites.Determinationofflexuralproperties
【原文标准名称】:纤维增强塑料复合材料.弯曲性能的测定
【标准号】:BSENISO14125-1998+A1-2011
【标准状态】:现行
【国别】:英国
【发布日期】:1998-06-15
【实施或试行日期】:1998-06-15
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:Aerospacetransport;Airtransport;Bendtesting;Bendingbehaviour;Bendingstiffness;Definitions;Determination;Fibrereinforced;Flexibility;Flexuralstrength;Four-pointmethods;Laminates;Materials;Mechanicaltesting;Plastics;Reinforcedmaterials;Testspecimens;Testing;Three-pointmethods
【摘要】:1.1ThisInternationalStandardspecifiesamethodfordeterminingtheflexuralpropertiesoffibre-reinforcedplasticcompositesunderthree-point(MethodA)andfour-point(MethodB)loading.Standardtestspecimensaredefinedbutparametersincludedforalternativespecimensizesforusewhereappropriate.Arangeoftestspeedsisincluded.1.2Themethodisnotsuitableforthedeterminationofdesignparameters,butmaybeusedforscreeningmaterials,orasaquality-controltest.NOTEForexample,theflexuralmodulusisonlyanappropriatevalueofthetensileYoung’smodulusofelasticityasthetestisnotfortheadditionaldeflectionduetotheshearstresswhichleadstoalowervalueoftheflexuralmodulusbutusestestspan/specimenthicknessratiosthatminimisethiseffect.Differencesbetweentensileandflexuralpropertiesarealsocausedbythematerialstructure/lay-up.1.3Themethodissuitableforfibre-reinforcedthermoplasticandthermosettingplasticcomposites.ISO178,Plastics—Determinationofflexuralproperties,appliestobulkcompoundshavingfibresshorterthan7,5mm.Thisisgenerallythecasewithmaterialsintendedforinjectionmoulding.1.4Themethodisperformedusingspecimenswhichmaybemouldedtothechosendimensions,machinedfromthecentralportionofthestandardmulti-purposetestspecimen(seeISO3167)ormachinedfromsemi-finishedorfinishedproductssuchasmouldingsorlaminates.1.5Themethodspecifiespreferreddimensionsforthespecimen.Testswhicharecarriedoutonspecimensofotherdimensions,oronspecimenswhicharepreparedunderdifferentconditions,mayproduceresultswhicharenotcomparable.Otherfactors,suchasthespeedoftestingandtheconditioningofthespecimenscaninfluencetheresults.Formaterialswhicharenothomogeneousthroughthesection,orabovethelinear-elasticresponseregion,theresultappliesonlytothethicknessandstructuretested.Consequently,whencomparativedataarerequired,thesefactorsmustbecarefullycontrolledandrecorded.
【中国标准分类号】:Q23
【国际标准分类号】:83_120
【页数】:26P.;A4
【正文语种】:英语