ASTM A 269-2002 普通设备用无缝和焊接奥氏体不锈钢管标准规范

上一篇: ASTM A 530/A 530M-2002 特种碳素钢和合金钢管一般要求的标准规范
下一篇: ASTM G 76-2002 使用气体喷雾器进行金属固体微粒磨损的标准试验方法

【英文标准名称】:Requirementsforelectricalinstallations-IEEWiringRegulations-Sixteenthedition
【原文标准名称】:电气设备的要求.IEE布线规则.第16版
【标准号】:BS7671-2001
【标准状态】:作废
【国别】:英国
【发布日期】:2001-06-01
【实施或试行日期】:2001-06-01
【发布单位】:英国标准学会(BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:电力设备;低压设备;电气工程;安全工程;防护电气设备;电击;电气事故;电气安全;电气布线系统;防火安全;低电压;电气设备;工业电力设备;民用电力设备;配电;电负载;电流;电力传输;电压;超低电压;临时电力设备;电气保护设备;露天电气设备;电力系统
【英文主题词】:
【摘要】:BS7671:2001.RequirementsforElectricalInstallationswasissuedon1June2001andcameintoeffecton1January2002.Installationsdesignedafter1January2002aretocomplywiththisedition.BS7671:2001includeschangesnecessarytomaintaintechnicalalignmentwithCENELECharmonizationdocuments,including:-anexpandedPart1:Scope,ObjectandFundamentalPrinciples-Section443:Protectionagainstovervoltagesofatmosphericoriginorduetoswitching-Section482:Precautionswhereparticularrisksordangersoffireexist-amendmentstoChapter43.Chapter46,Section604(ConstructionSiteInstallations)andSection611(InstallationofHighwayPowerSupplies,StreetFurnitureandStreetLocatedEquipment)Changesofanationalorigininclude:-arevisionofSection607(Earthingrequirementsfortheinstallationofequipmenthavinghighprotectiveconductorcurrents)
【中国标准分类号】:K04
【国际标准分类号】:29_020;91_140_50
【页数】:317P;A4
【正文语种】:英语


【英文标准名称】:StandardPracticeforReportingUniaxialStrengthDataandEstimatingWeibullDistributionParametersforAdvancedCeramics
【原文标准名称】:高级陶瓷用报告单轴强度数据和评估维泊尔分布参数的标准实施规程
【标准号】:ASTMC1239-2007
【标准状态】:现行
【国别】:
【发布日期】:2007
【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】:C28.01
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:陶瓷;额定值;应力
【英文主题词】:advancedceramics;censoreddata;confidencebounds;fractography;fractureorigin;maximumlikelihood;strength;unbiasingfactors;Weibullcharacteristicstrength;Weibullmodulus;Weibullscaleparameter;Weibullstatistics
【摘要】:1.1ThispracticecoverstheevaluationandreportingofuniaxialstrengthdataandtheestimationofWeibullprobabilitydistributionparametersforadvancedceramicsthatfailinabrittlefashion(seeFig.1).TheestimatedWeibulldistributionparametersareusedforstatisticalcomparisonoftherelativequalityoftwoormoretestdatasetsandforthepredictionoftheprobabilityoffailure(or,alternatively,thefracturestrength)forastructureofinterest.Inaddition,thispracticeencouragestheintegrationofmechanicalpropertydataandfractographicanalysis.1.2Thefailurestrengthofadvancedceramicsistreatedasacontinuousrandomvariabledeterminedbytheflawpopulation.Typically,anumberoftestspecimenswithwell-definedgeometryarefailedunderisothermal,well-defineddisplacementand/orforce-applicationconditions.Theforceatwhicheachtestspecimenfailsisrecorded.TheresultingfailurestressdataareusedtoobtainWeibullparameterestimatesassociatedwiththeunderlyingflawpopulationdistribution.1.3Thispracticeisrestrictedtotheassumptionthatthedistributionunderlyingthefailurestrengthsisthetwo-parameterWeibulldistributionwithsizescaling.Furthermore,thispracticeisrestrictedtotestspecimens(tensile,flexural,pressurizedring,etc.)thatareprimarilysubjectedtouniaxialstressstates.Thepracticealsoassumesthattheflawpopulationisstablewithtimeandthatnoslowcrackgrowthisoccurring.1.4ThepracticeoutlinesmethodstocorrectforbiaserrorsintheestimatedWeibullparametersandtocalculateconfidenceboundsonthoseestimatesfromdatasetswhereallfailuresoriginatefromasingleflawpopulation(thatis,asinglefailuremode).Insampleswherefailuresoriginatefrommultipleindependentflawpopulations(forexample,competingfailuremodes),themethodsoutlinedinSection9forbiascorrectionandconfidenceboundsarenotapplicable.1.5Thispracticeincludesthefollowing:1.6ThevaluesstatedinSIunitsaretoberegardedasthestandardperIEEE/ASTMSI10.
【中国标准分类号】:Q32
【国际标准分类号】:81_060_99
【页数】:19P.;A4
【正文语种】: