SAE MAM2279 Tolerances, Metric, Rubber Products
作者:标准资料网 时间:2024-05-19 18:18:31 浏览:8607
来源:标准资料网
Product Code:SAE MAM2279
Title:Tolerances, Metric, Rubber Products
Issuing Committee:Ams Ce Elastomers Committee
Scope:This specification covers established metric (SI) manufacturing tolerances applicable to non-cellular rubber products ordered to metric dimensions. These tolerances apply to all conditions, unless otherwise noted. The term "exclusive" applies only to the higher figure of the specified range.
基本信息
标准名称: | 化学试剂 硝酸锶 |
中标分类: |
化工 >>
化学试剂 >>
一般无机试剂 |
替代情况: | 被GB/T 669-1994代替 |
发布日期: | 1900-01-01 |
实施日期: | 1977-10-01 |
首发日期: | 1900-01-01 |
作废日期: | 1900-01-01 |
出版日期: | 1900-01-01 |
页数: | 3页 |
适用范围
没有内容
前言
没有内容
目录
没有内容
引用标准
没有内容
所属分类: 化工 化学试剂 一般无机试剂
【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