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【英文标准名称】:StandardTestMethodforAmbientTemperatureFatigueLifeofMetallicBondedResistanceStrainGages
【原文标准名称】:金属粘合抗应变仪的环境温度疲劳寿命的标准试验方法
【标准号】:ASTME1949-2003
【标准状态】:现行
【国别】:
【发布日期】:2003
【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】:E28.01
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:疲劳;机械试验;应变仪;应变;试验方法
【英文主题词】:ambient;fatiguelife;straingage
【摘要】:Straingagesarethemostwidelyuseddevicesformeasuringstrainsandforevaluatingstressesinstructures.Inmanyapplicationsthereareoftencyclicloadswhichcancausestraingagefailure.Performanceparametersofstraingagesareaffectedbyboththematerialsfromwhichtheyaremadeandtheirgeometricdesign.Thedeterminationofmoststraingageparametersrequiresmechanicaltestingthatisdestructive.Sincegagestestedforfatiguelifecannotbeusedagain,itisnecessarytotreatdatastatistically.Ingeneral,longerandwidergageswithlowerresistanceswillhavegreaterfatiguelife.Optionaladditionstogages(integralleadsareanexample)willoftenreducefatiguelife.Tobeused,straingagesmustbebondedtoastructure.Goodresults,particularlyinafatigueenvironment,dependheavilyonthematerialsusedtocleanthebondingsurface,tobondthegage,andtoprovideaprotectivecoating.Skilloftheinstallerisanothermajorfactorinsuccess.Finally,instrumentationsystemsmustbecarefullyselectedandcalibratedtoensurethattheydonotundulydegradetheperformanceofthegages.Thistestmethodencompassesonlyfullyreversedstraincycles.Fatiguefailureofastraingagemaynotinvolvevisiblecrackingorfractureofthegage,butmerelysufficientzeroshifttocompromisetheaccuracyofthegageoutputforstaticstraincomponents.1.1Thistestmethodcoversauniformprocedureforthedeterminationofstraingagefatiguelifeatambienttemperature.Asuggestedtestingequipmentdesignisincluded.1.2Thistestmethoddoesnotapplytoforcetransducersorextensometersthatusebondedresistancestraingagesassensingelements.1.3Straingagesarepartofacomplexsystemthatincludesstructure,adhesive,gage,leadwires,instrumentation,and(often)environmentalprotection.Asaresult,manythingsaffecttheperformanceofstraingages,includingusertechnique.Afurthercomplicationisthatstraingages,onceinstalled,normallycannotbereinstalledinanotherlocation.Therefore,itisnotpossibletocalibrateindividualstraingages;performancecharacteristicsarenormallypresentedonastatisticalbasis.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortoitsuse.
【中国标准分类号】:N51
【国际标准分类号】:19_060
【页数】:5P.;A4
【正文语种】:


【英文标准名称】:Railwayapplications-Currentcollectionsystems-Requirementsforandvalidationofmeasurementsofthedynamicinteractionbetweenpantographandoverheadcontactline;GermanversionEN50317:2002/A2:2007
【原文标准名称】:铁路设施.集流系统.电杆和架空线间动态电子相互作用的测量的有校性及要求
【标准号】:EN50317/A2-2007
【标准状态】:现行
【国别】:
【发布日期】:2008-02
【实施或试行日期】:2008-02-01
【发布单位】:欧洲标准学会(EN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:交流开关和控制开关;交流断路器;校正;触点压力;集电器;集流设备;直流电流;直流装置;电弧;电力牵引;电气工程;电驱动装置;额定电压装置;测量;测量精度;测量系统;测量技术;架空接触线路;设备;过程测量和控制技术;铁路设施;铁路电力牵引装置;铁路;规范(验收);开关;开关设备;交通车辆;有校性
【英文主题词】:ACswitchgearandcontrolgear;Alternating-currentcircuitbreakers;Calibration;Contactforces;Currentcollectors;Current-collectingequipment;Directcurrent;Directcurrentinstallations;Electricarcs;Electrictraction;Electricalengineering;Electrically-operateddevices;Installationsforratedvoltages;Measurement;Measuringaccuracy;Measuringsystems;Measuringtechniques;Overheadcontactlines;Plant;Processmeasuringandcontroltechnology;Railwayapplications;Railwayelectrictractionequipment;Railways;Specification(approval);Switches;Switchgears;Trafficvehicles;Validation
【摘要】:
【中国标准分类号】:S80
【国际标准分类号】:29_280;45_060_10
【页数】:4P.;A4
【正文语种】:英语