【英文标准名称】:Guideforprotectiverelayapplicationtotransmission-lineseriescapacitorbanks
【原文标准名称】:传输线串联电容器组用保护继电器指南
【标准号】:IEEEC37.116-2007
【标准状态】:现行
【国别】:美国
【发布日期】:2007
【实施或试行日期】:
【发布单位】:美国电气电子工程师学会(IEEE)
【起草单位】:IEEE
【标准类型】:()
【标准水平】:()
【中文主题词】:电容器组;定义;配电;电力网;电力系统;电气工程;电气设备;电气保护设备;网络保护;动力传输;防电击;保护设备;保护继电器;继电器;安全工程;测试
【英文主题词】:
【摘要】:
【中国标准分类号】:L11
【国际标准分类号】:29_120_70;31_060_99
【页数】:111P;A4
【正文语种】:英语
基本信息
| 标准名称： | Ｈ型孔系组合夹具系统附件 Ｔ形内六角扳手 |
| 中标分类： |
|
| 发布日期： | 1992-01-23 |
| 实施日期： | 1992-03-01 |
| 首发日期： | 1900-01-01 |
| 作废日期： | 1900-01-01 |
| 出版日期： | 1900-01-01 |
| 页数： | 1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：
【英文标准名称】:StandardTestMethodforDeterminingJ-RCurvesofPlasticMaterials
【原文标准名称】:测定塑料材料J-R曲线的标准试验方法
【标准号】:ASTMD6068-1996(2002)e1
【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】:D20.10
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:材料试验;聚合材料;塑料和橡胶技术
【英文主题词】:crackgrowthresistance;fracturetoughness;J-Rcurves;plastics;polymers
【摘要】:AJ-Rcurveproducedinaccordancewiththistestmethodcharacterizesthecrackgrowthresistancesofawiderangeoftoughpolymersandpolymerblends(1-5)7thatcannotbeobtainedinsufficientsizeandthicknessforvalidcharacterizationbylinearelasticfracturemechanicsinTestMethodsD5045.TheJ-Rcurvecharacterizes,withinthelimitssetforthinthistestmethod,theresistanceofapolymericmaterialtoslowstablecrackgrowthafterinitiationfromapreexistingsharpflaw.AJ-Rcurvecanbeusedasanindexofmaterialtoughnessforblendoralloydesign,materialselection,materialsprocessing,andqualityassurance(6).TheJ-RcurvesfrombendspecimensrepresentlowerboundestimatesofJcapacityasafunctionofcrackextension,andhavebeenobservedtobeconservativerelativetothoseobtainedfromspecimenconfigurationsundertensileloading.TheJ-Rcurvesforagivenmaterialofconstantmicrostructuretendtoexhibitlowerslope(flatter)withincreasingthickness.Thus,itisrecommendedthatthelargestpossiblespecimenwithrepresentativemicrostructurebeused.TheJ-Rcurvecanbeusedtoassessthestabilityofcracksinstructuresinthepresenceofductiletearing,withawarenessofthedifferencesthatmayexistbetweenlaboratorytestandfieldconditions.AJ-Rcurvemaydependontheorientationandpropagationofthecrackinrelationtotheanisotropyofthematerialwhichmaybeinducedbyspecimenfabricationmethods.Becauseofthepossibilityofratedependenceofcrackgrowthresistance,J-Rcurvescanbedeterminedatdisplacementratesotherthanthatspecifiedinthistestmethod(7).1.1ThistestmethodcoversthedeterminationoftheJ-integralversuscrackgrowthresistance(J-R)curvesforpolymericmaterials.1.2Thistestmethodisintendedtocharacterizetheslow,stablecrackgrowthresistanceofbend-typespecimensinsuchamannerthatitisgeometryinsensitivewithinlimitssetforthinthistestmethod.1.3Therecommendedspecimensarethethree-pointbend(SE(B))andpin-loadedcompacttension(C(T))specimens.Bothspecimenshavein-planedimensionsofconstantproportionalityforallsizes.Specimenconfigurationsotherthanthoserecommendedinthistestmethodmayrequiredifferentproceduresandvalidityrequirements.1.4Thistestmethoddescribesamultiplespecimenmethodthatrequiresopticalmeasurementofcrackextensionfromfracturesurfaces.Itisnotrecommendedforusewithmaterialsinwhichthecrackfrontcannotbedistinguishedfromadditionaldeformationprocessesinadvanceofthecracktip.1.5ThevaluesstatedinSIunitsaretoberegardedasthestandard.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Note18212;ThereisnoequivalentISOstandard.
【中国标准分类号】:G31
【国际标准分类号】:83_040_01
【页数】:8P.;A4
【正文语种】: