ASTM A741-1998(2003) 高速公路护栏用镀锌钢丝绳和配件的标准规范
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【英文标准名称】:StandardSpecificationforZinc-CoatedSteelWireRopeandFittingsforHighwayGuardrail
【原文标准名称】:高速公路护栏用镀锌钢丝绳和配件的标准规范
【标准号】:ASTMA741-1998(2003)
【标准状态】:现行
【国别】:
【发布日期】:1998
【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】:A05.12
【标准类型】:(Specification)
【标准水平】:()
【中文主题词】:高速公路;金属丝绳;锌覆层;钢丝绳;护栏;钢;覆层;涂覆的;钢产品
【英文主题词】:galvanizedwire;steelwire;zinc-coatedcarbonsteelwire
【摘要】:1.1Thisspecificationcovers3/4and1-in.(19and25-mm)zinc-coatedsteelwireropeandfittingsforuseintheconstructionofhighwayguardrail.1.2Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.
【中国标准分类号】:H49
【国际标准分类号】:77_140_65
【页数】:3P.;A4
【正文语种】:
【英文标准名称】:StandardTestMethodforDynamicYoung'sModulus,ShearModulus,andPoisson'sRatioforAdvancedCeramicsbySonicResonance
【原文标准名称】:用声谐振测定高级陶瓷的动态扬氏模量、剪切模量和泊松比的标准试验方法
【标准号】:ASTMC1198-2008
【标准状态】:现行
【国别】:
【发布日期】:2008
【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】:(TestMethod)
【标准水平】:()
【中文主题词】:声学测量;陶瓷;测试
【英文主题词】:advancedceramics;bar;beam;cylindricalrod;dynamic;elasticmodulus;flexure;elasticproperties;Poisson'sratio;resonance;resonantbeam;shearmodulus;torsion;Young'smodulus;Advancedceramics;Audiooscillator;Dynamicelasticproperties;Elasticproperties;Modulusofelasticity;Nondestructiveevaluation(NDE)--nonmetallicmaterials;Poisson'sratio;Resonances;Resonantbeam;Shearmodulus;Sheartesting--ceramics;Sinusoidalvoltage;Sonicresonance;Stress--ceramics;Variable-frequencyaudiooscillator;Young'smodulus
【摘要】:p>Thistestmethodmaybeusedformaterialdevelopment,characterization,designdatageneration,andqualitycontrolpurposes.Itisspecificallyappropriatefordeterminingthemodulusofadvancedceramicsthatareelastic,homogeneous,andisotropic.Thistestmethodisnondestructiveinnature.Onlyminutestressesareappliedtothespecimen,thusminimizingthepossibilityoffracture.Theperiodoftimeduringwhichmeasurementstressisappliedandremovedisoftheorderofhundredsofmicroseconds.Withthistestmethoditisfeasibletoperformmeasurementsathightemperatures,wheredelayedelasticandcreepeffectswouldinvalidatemodulusmeasurementscalculatedfromstaticloading.Thistestmethodhasadvantagesincertainrespectsovertheuseofstaticloadingsystemsformeasuringmoduliinadvancedceramics.Itisnondestructiveinnatureandcanbeusedforspecimenspreparedforothertests.Specimensaresubjectedtominutestrains;hence,themoduliaremeasuredatorneartheoriginofthestress-straincurvewiththeminimumpossibilityoffracture.Theperiodoftimeduringwhichmeasurementstressisappliedandremovedisoftheorderofhundredsofmicroseconds.Withthistestmethoditisfeasibletoperformmeasurementsathightemperatures,1.1Thistestmethodcoversthedeterminationofthedynamicelasticpropertiesofadvancedceramics.Specimensofthesematerialspossessspecificmechanicalresonantfrequenciesthataredeterminedbytheelasticmodulus,mass,andgeometryofthetestspecimen.Therefore,thedynamicelasticpropertiesofamaterialcanbecomputedifthegeometry,mass,andmechanicalresonantfrequenciesofasuitabletestspecimenofthatmaterialcanbemeasured.DynamicYoung'smodulusisdeterminedusingtheresonantfrequencyintheflexuralmodeofvibration.Thedynamicshearmodulus,ormodulusofrigidity,isfoundusingtorsionalresonantvibrations.DynamicYoung'smodulusanddynamicshearmodulusareusedtocomputePoisson'sratio.1.2Thistestmethodmeasurestheresonantfrequenciesoftestspecimensofsuitablegeometrybymechanicallyexcitingthematcontinuouslyvariablefrequencies.Mechanicalexcitationofthebarsisprovidedthroughtheuseofatransducerthattransformsacyclicelectricalsignalintoacyclicmechanicalforceonthespecimen.Asecondtransducersensestheresultingmechanicalvibrationsofthespecimenandtransformsthemintoanelectricalsignal.Theamplitudeandfrequencyofthesignalaremeasuredbyanoscilloscopeorother
【中国标准分类号】:
【国际标准分类号】:
【页数】:11P.;A4
【正文语种】:
基本信息
标准名称: | 倾斜式微压计检定规程 |
英文名称: | Verification Regulation of Tilting Tube Micromanometer |
中标分类: |
综合 >>
计量 >>
力学计量 |
替代情况: | JJG 172-1984;被JJG 172-2011代替 |
发布部门: | 国家技术监督局 |
发布日期: | 1994-04-05 |
实施日期: | 1994-12-01 |
首发日期: | |
作废日期: | 2012-06-28 |
归口单位: | 上海市技术监督局 |
起草单位: | 上海市计量技术研究所 |
起草人: | 屠立猛 |
出版社: | 中国计量出版社 |
出版日期: | 1994-12-01 |
页数: | 11页 |
书号: | 155026-752 |
适用范围
本规程适用于新制造、使用中和修理后的倾斜式微压计的检定。
前言
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目录
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引用标准
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所属分类: 综合 计量 力学计量