EJ/T 536-1991 钚--239α参考源
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来源:标准资料网
基本信息
| 标准名称： | 钚--239α参考源 |
| 中标分类： |
能源、核技术 >>
同位素与放射源 >>
放射源 |
| ICS分类： |
能源和热传导工程 >>
核能工程 >>
有关核能的其他标
|
| 发布日期： | 1991-10-11 |
| 实施日期： | 1992-03-01 |
| 首发日期： | |
| 作废日期： | |
| 出版日期： | |
| 页数： | 7页 |
适用范围
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前言
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目录
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引用标准
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所属分类： 能源 核技术 同位素与放射源 放射源 能源和热传导工程 核能工程 有关核能的其他标
【英文标准名称】:Unitheads.Multispindleheads.Simplestraighttoothedpinions.
【原文标准名称】:组合机床动力头.多轴头.简单的直齿轮
【标准号】:NFE62-250-1976
【标准状态】:作废
【国别】:法国
【发布日期】:1976-12-01
【实施或试行日期】:1976-12-16
【发布单位】:法国标准化协会(AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:标准化组件;名称与符号;尺寸;金属加工机械;材料规范;规范;小齿轮;尺寸公差;机床;齿轮;多轴头;机床部件;成形机
【英文主题词】:
【摘要】:
【中国标准分类号】:J52
【国际标准分类号】:25_060_10
【页数】:2P;A4
【正文语种】:其他
【英文标准名称】:StandardTestMethodsforFlexuralPropertiesofUnreinforcedandReinforcedPlasticsandElectricalInsulatingMaterials
【原文标准名称】:非增强和增强塑料和电绝缘材料的挠性特性的标准试验方法
【标准号】:ASTMD790-2010
【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】:D20.10
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:flexuralproperties;plastics;stiffness;strength;Electricalinsulatingplastics;Flexuraltesting--electricalinsulatingmaterials;Flexuraltesting--plastics;Reinforcedplastics;Stiffness--plastics;Unreinforcedplastics
【摘要】:Flexuralpropertiesasdeterminedbythesetestmethodsareespeciallyusefulforqualitycontrolandspecificationpurposes.Materialsthatdonotfailbythemaximumstrainallowedunderthesetestmethods(3-pointbend)maybemoresuitedtoa4-pointbendtest.Thebasicdifferencebetweenthetwotestmethodsisinthelocationofthemaximumbendingmomentandmaximumaxialfiberstresses.Themaximumaxialfiberstressesoccuronalineundertheloadingnosein3-pointbendingandovertheareabetweentheloadingnosesin4-pointbending.Flexuralpropertiesmayvarywithspecimendepth,temperature,atmosphericconditions,andthedifferenceinrateofstrainingasspecifiedinProceduresAandB(seealsoNote7).Beforeproceedingwiththesetestmethods,referenceshouldbemadetotheASTMspecificationofthematerialbeingtested.Anytestspecimenpreparation,conditioning,dimensions,ortestingparameters,orcombinationthereof,coveredintheASTMmaterialspecificationshalltakeprecedenceoverthosementionedinthesetestmethods.Table1inClassificationSystemD4000liststheASTMmaterialspecificationsthatcurrentlyexistforplastics.1.1Thesetestmethodscoverthedeterminationofflexuralpropertiesofunreinforcedandreinforcedplastics,includinghigh-moduluscompositesandelectricalinsulatingmaterialsintheformofrectangularbarsmoldeddirectlyorcutfromsheets,plates,ormoldedshapes.Thesetestmethodsaregenerallyapplicabletobothrigidandsemirigidmaterials.However,flexuralstrengthcannotbedeterminedforthosematerialsthatdonotbreakorthatdonotfailintheoutersurfaceofthetestspecimenwithinthe5.0%strainlimitofthesetestmethods.Thesetestmethodsutilizeathree-pointloadingsystemappliedtoasimplysupportedbeam.Afour-pointloadingsystemmethodcanbefoundinTestMethodD6272.1.1.1ProcedureA,designedprincipallyformaterialsthatbreakatcomparativelysmalldeflections.1.1.2ProcedureB,designedparticularlyforthosematerialsthatundergolargedeflectionsduringtesting.1.1.3ProcedureAshallbeusedformeasurementofflexuralproperties,particularlyflexuralmodulus,unlessthematerialspecificationstatesotherwise.ProcedureBmaybeusedformeasurementofflexuralstrengthonly.TangentmodulusdataobtainedbyProcedureAtendstoexhibitlowerstandarddeviationsthancomparabledataobtainedbymeansofProcedureB.1.2Comparativetestsmayberuninaccordancewitheitherprocedure,providedthattheprocedureisfoundsatisfactoryforthematerialbeingtested.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesprovidedinparenthesesareforinformationonly.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Note18212;ThesetestmethodsarenottechnicallyequivalenttoISO178.
【中国标准分类号】:K15
【国际标准分类号】:29_035_20
【页数】:11P.;A4
【正文语种】:英语
