【英文标准名称】:Plastics-Determinationoffracturetoughness(GicandKic)atmoderatelyhighloadingrates(1m/s)
【原文标准名称】:在适度高负载率(1m/s)下(GDOWNiDOWNc和KDOWNiDOWNc)抗断裂韧性的测定
【标准号】:BSISO17281-2002
【标准状态】:现行
【国别】:英国
【发布日期】:2002-11-22
【实施或试行日期】:2002-11-22
【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】:断裂试验;测定;机械试验;裂纹;裂开;塑料;断裂韧性;抗断裂强度;机械处理;试样制备;试验
【英文主题词】:Breakingstrength;Breakingtests;Cracktoughness;Cracking;Determination;Flaws;Fracturetoughness;Mechanicaltesting;Mechanicaltreatment;Plastics;Specimenpreparation;Testing
【摘要】:ThisInternationalStandardprovidesguidelinesfordeterminingthefracturetoughnessofplasticsinthecrack-openingmode(ModeI)byalinearelasticfracturemechanics(LEMF)approach,atload-pointdisplacementratesofupto1m/s.ItsupplementsISO13586soastoextenditsapplicabilitytoloadingratessomewhathigherthanisthecaseinthescopeofthelatterInternationalStandard.Fracturetestingathighloadingratespresentsspecialproblemsbecauseofthepresenceofdynamiceffects:vibrationsinthetestsystemproducingoscillationsintherecordedquantities,andinertialloadsproducingforcesonthetestspecimendifferentfromtheforcessensedbythetestfixture.Theseeffectsneedeithertobecontrolledand,ifpossible,reducedbyappropriateaction,orelsetobetakenintoaccountthroughproperanalysisofthemeasureddata.Therelativeimportanceofsucheffectsincreaseswithincreasingtestingrate(decreasingtestduration).Atspeedsoflessthan0,1m/s(loadingtimesofgreaterthan10ms)thedynamiceffectsmaybenegligibleandthetestingproceduregiveninISO13586canbeappliedasitstands.Atspeedsapproaching1m/s(loadingtimesoftheorderof1ms)thedynamiceffectsmaybecomesignificantbutstillcontrollable.TheproceduregiveninISO13586canstillbeusedthoughwithsomeprovisosandthesearecontemplatedinthisInternationalStandard.Atspeedsofseveralmeterspersecondandhigher(loadingtimesmarkedlyshorterthan1ms)thedynamiceffectsbecomedominant,anddifferentapproachestofracturetoughnessdeterminationarerequired,whichareoutsidethescopeofthisInternationalStandard.Thegeneralprinciples,methodsandrulesgiveninISO13586forfracturetestingatlowloadingratesremainvalidandshouldbefollowedexceptwhereexpresslystatedotherwiseinthisInternationalStandard.ThemethodsaresuitableforusewiththesamerangeofmaterialsascoveredbyISO13586.Althoughthedynamiceffectsoccurringathighloadingratesarelargelydependentonthematerialtestedaswellasonthetestequipmentandtestgeometryused,theguidelinesgivenherearevalidingeneral,irrespectiveoftestequipment,testgeometryandmaterialtested.Thesamerestrictionsastolinearityoftheload-displacementdiagram,specimensizeandnotchtipsharpnessapplyasforISO13586.Thelinearityrequirementsreferredtoin6.1ofISO13586:2000,areverifiedhereonthe"smoothed"load-displacementcurve,tobeobtainedasspecifiedin8.1.
【中国标准分类号】:G31
【国际标准分类号】:83_080_01
【页数】:32P.;A4
【正文语种】:英语


【英文标准名称】:Electricalinstallationsforlightingandbeaconingofaerodromes-Technicalrequirementsforaeronauticalgroundlightingcontrolandmonitoringsystems-Unitsforselectiveswitchingandmonitoringofindividuallamps
【原文标准名称】:机场照明和航路信标指示用电气设备.地面导航照明控制和监测系统用技术要求.个别灯的选择性开关和监控装置
【标准号】:BSEN50490-2008
【标准状态】:现行
【国别】:英国
【发布日期】:2009-04-30
【实施或试行日期】:2009-04-30
【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】:空中交通管制;飞机场;飞机航行灯;航空港;电路;控制系统;定义;电连接;电气工程;电气装置;灯;照明设备;监视装置;运行监控系统;选择的;信号装置;信号系统;信号;规范(验收);监督(认可);试验;交通控制系统
【英文主题词】:Airtrafficcontrol;Airfields;Airportnavigationlights;Airports;Circuits;Controlsystems;Definitions;Electricconnection;Electricalengineering;Electricalinstallations;Lamps;Lightingplants;Monitoringdevice;Operationalmonitoringsystems;Selective;Signaldevices;Signalsystems;Signals;Specification(approval);Surveillance(approval);Testing;Trafficcontrolsystems
【摘要】:ThisEuropeanStandardisintendedtogivegeneralminimumframerequirementsforunitsthatareindependentofthetechnologyusedforswitchingand/ormonitoringofindividualorgroupoflampsinanAGLseriescircuit.ThisEuropeanStandard?appliestotheunitsthataredirectlyelectricallyconnectedtotheprimaryorsecondarysideofanAGLseriescircuitandareneededtoprovidetheselectiveswitchingand/ormonitoringoflamps,?doesnotcovercommunicationprotocolsandapplicationprocedures,?doesnottreatsystemaspectsthatinfluencetheAGLoperation.NOTETheseunitsmaybeusedformingpartofeitheraSMGCSorA-SMGCStoguideand/orcontrolthesurfacemovementofaircraftbymeansofvisualaids.
【中国标准分类号】:V56
【国际标准分类号】:93_120
【页数】:18P.;A4
【正文语种】:英语