【英文标准名称】:StandardTestMethodsforPerformanceCharacteristicsofMetallicBondedResistanceStrainGages
【原文标准名称】:金属粘结电阻应变仪性能特征的标准试验方法
【标准号】:ASTME251-1992(2003)
【标准状态】:现行
【国别】:
【发布日期】:1992
【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】:测量;机械试验;应变;试验;质量;延伸;伸长仪;试验设备;应变仪;工作特性
【英文主题词】:bondedresistancestraingages;elongation-metallicmaterials;gagefactor;performance;resistance;resistancegages;straingages;temperaturetests;transversesensitivity;performancecharacteristicsofmetallicbondedresistancestraingages,test
【摘要】:Straingagesarethemostwidelyuseddevicesforthedeterminationofmaterials,propertiesandforanalyzingstressesinstructures.However,performanceparametersofstraingagesareaffectedbyboththematerialsfromwhichtheyaremadeandtheirgeometricdesign.Thesetestmethodsdetailtheminimuminformationthatmustaccompanystraingagesiftheyaretobeusedwithacceptableaccuracyofmeasurement.Mostperformanceparametersofstraingagesrequiremechanicaltestingthatisdestructive.Sincetestgagescannotbeusedagain,itisnecessarytotreatdatastatisticallyandthenapplyvaluestotheremainingpopulationfromthesamelotorbatch.Failuretoacknowledgetheresultinguncertaintiescanhaveseriousrepercussions.Resistancemeasurementisnon-destructiveandcanbemadeforeachgage.Properlydesignedandmanufacturedstraingages,whosepropertieshavebeenaccuratelydeterminedandwithappropriateuncertaintiesapplied,representpowerfulmeasurementtools.Theycandeterminesmalldimensionalchangesinstructureswithexcellentaccuracy,farbeyondthatofotherknowndevices.Itisimportanttorecognize,however,thatindividualstraingagescannotbecalibrated.Ifcalibrationandtraceabilitytoastandardarerequired,straingagesshouldnotbeemployed.Tobeused,straingagesmustbebondedtoastructure.Goodresultsdependheavilyonthematerialsusedtocleanthebondingsurface,tobondthegage,andtoprovideaprotectivecoating.Skilloftheinstallerisanothermajorfactorinsuccess.Finally,instrumentationsystemsmustbecarefullydesignedtoassurethattheydonotundulydegradetheperformanceofthegages.Inmanycases,itisimpossibletoachievethisgoal.Ifso,allowancemustbemadewhenconsideringaccuracyofdata.Testconditionscan,insomeinstances,besoseverethaterrorsignalsfromstraingagesystemsfarexceedthosefromthestructuraldeformationstobemeasured.Greatcaremustbeexercisedindocumentingmagnitudesoferrorsignalssothatrealisticvaluescanbeplacedonassociateduncertainties.1.1Thepurposeofthisstandardistoprovideuniformtestmethodsforthedeterminationofstraingageperformancecharacteristics.Suggestedtestingequipmentdesignsareincluded.1.2TestMethodsE251describesmethodsandproceduresfordeterminingfivestraingageparameters:SectionPartI-GeneralRequirements7PartII-ResistanceataReferenceTemperature8PartIII-GageFactorataReferenceTemperature9PartIV-TemperatureCoefficientofGageFactor10PartV-TransverseSensitivity11PartVI-ThermalOutput12
基本信息
| 标准名称： | 不锈钢盘条 |
| 英文名称： | Stainless steel wire rods |
| 中标分类： |
冶金 >>
钢铁产品 >>
型钢、异型钢 |
| ICS分类： |
冶金 >>
钢铁产品 >>
钢棒和钢条
|
| 替代情况： | 被GB/T 4356-2002代替 |
| 发布日期： | 1984-04-30 |
| 实施日期： | 1985-05-01 |
| 首发日期： | 1900-01-01 |
| 作废日期： | 2003-06-01 |
| 起草单位： | 陕西钢厂 |
| 出版日期： | 1900-01-01 |
| 页数： | 2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： 冶金 钢铁产品 型钢 异型钢 冶金 钢铁产品 钢棒和钢条