SAE ARP1590 Recommended Part Numbering Guidelines for Fluid System Components Inch System of Measurement
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Product Code:SAE ARP1590
Title:Recommended Part Numbering Guidelines for Fluid System Components Inch System of Measurement
Issuing Committee:G-3, Aerospace Couplings, Fittings, Hose, Tubing Assemblies
Scope:This SAE Aerospace Recommended Practice (ARP) presents a recommended part numbering scheme for fluid system component parts, which may require complex standard numbers. Standardizing on certain numbering systems provides for numbering simplicity, ease of interchangeability and supersession (when required), standardization and limitation of usable codes.This ARP is similar to ISO/TC20/SC10 and its usage is recommended for commonality in international standard part numbering practices.
【英文标准名称】:Informationanddocumentation;commandsforinteractivetextsearching
【原文标准名称】:信息和文献交互式文本查找指令
【标准号】:ISO8777-1993
【标准状态】:现行
【国别】:国际
【发布日期】:1993-09
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/TC46
【标准类型】:()
【标准水平】:()
【中文主题词】:情报检索;会话方式;检索;研究;相互作用;文献工作;定义;命令;信息
【英文主题词】:Commands;Conversationalmode;Definitions;Documentations;Information;Informationretrieval;Interaction;Research;Retrieval
【摘要】:Specifiesabasicsetofcommandsfortheinteractivesearchofretrievalsystemsdataandthetypesofresponseexpectedfromtheprocessingsystem.Isintendedforusebydesignersandusersofinformationretrievalsystems,includingcomputer-basedlibrarycataloguesandcomputer-baseddatabaseaccessandsearchfacilities.
【中国标准分类号】:A14
【国际标准分类号】:35_240_30
【页数】:23P.;A4
【正文语种】:英语
【英文标准名称】:StandardTestMethodforDynamicYoung''sModulus,ShearModulus,andPoisson''sRatioforAdvancedCeramicsbyImpulseExcitationofVibration
【原文标准名称】:用振动脉冲激励法的高级陶瓷动态杨氏模量、剪切模量和泊松比的标准试验方法
【标准号】:ASTMC1259-2008e1
【标准状态】:现行
【国别】:美国
【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】:
【英文主题词】:advancedceramics;bar;beam;cylindricalrod;disc;dynamic;elasticmodulus;flexure;elasticproperties;impulse;Poisson'sratio;resonance;resonantbeam;shearmodulus;torsion;Young'smodulus;Advancedceramics;Dynamicelasticproperties;Elastic
【摘要】:Thistestmethodmaybeusedformaterialdevelopment,characterization,designdatageneration,andqualitycontrolpurposes.Thistestmethodisspecificallyappropriatefordeterminingthemodulusofadvancedceramicsthatareelastic,homogeneous,andisotropic(1).Thistestmethodaddressestheroomtemperaturedeterminationofdynamicmoduliofelasticityofslenderbars(rectangularcross-section)androds(cylindrical).Flatplatesanddisksmayalsobemeasuredsimilarly,buttherequiredequationsfordeterminingthemoduliarenotaddressedherein.Thisdynamictestmethodhasseveraladvantagesanddifferencesfromstaticloadingtechniquesandfromresonanttechniquesrequiringcontinuousexcitation.Thetestmethodisnondestructiveinnatureandcanbeusedforspecimenspreparedforothertests.Thespecimensaresubjectedtominutestrains;hence,themoduliaremeasuredatorneartheoriginofthestress-straincurve,withtheminimumpossibilityoffracture.Theimpulseexcitationtestusesanimpacttoolandsimplesupportsforthetestspecimen.Thereisnorequirementforcomplexsupportsystemsthatrequireelaboratesetuporalignment.Thistechniquecanbeusedtomeasureresonantfrequenciesaloneforthepurposesofqualitycontrolandacceptanceoftestspecimensofbothregularandcomplexshapes.Arangeofacceptableresonantfrequenciesisdeterminedforaspecimenwithaparticulargeometryandmass.Deviationsinspecimendimensionsormassandinternalflaws(cracks,delaminations,inhomogeneities,porosity,etc)willchangetheresonantfrequencyforthatspecimen.Anyspecimenwitharesonantfrequencyfallingoutsidetheprescribedfrequencyrangeisrejected.Theactualmodulusofeachspecimenneednotbedeterminedaslongasthelimitsoftheselectedfrequencyrangeareknowntoincludetheresonantfrequencythatthespecimenmustpossessifitsgeometryandmassandinternalstructurearewithinspecifiedtolerances.Thetechniqueisparticularlysuitablefortestingspecimenswithcomplexgeometries(otherthanparallelepipeds,cylinders/rods,ordiscs)thatwouldnotbesuitablefortestingbyotherprocedures.ThisissimilartotheevaluationmethoddescribedinGuideE2001.Ifathermaltreatmentoranenvironmentalexposureaffectstheelasticresponseofthetestspecimen,thistestmethodmaybesuitableforthedeterminationofspecificeffectsofthermalhistory,environmentexposure,etc.Specimendescriptionsshouldincludeanyspecificthermaltreatmentsorenvironmentalexposuresthatthespecimenshavereceived.1.1Thistestmethodcoversdeterminationofthedynamicelasticpropertiesofadvancedceramicsatambienttemperatures.Specimensofthesematerialspossessspecificmechanicalresonantfrequenciesthataredeterminedbytheelasticmodulus,mass,andgeometryofthetestspecimen.Thedynamicelasticpropertiesofamaterialcanthereforebecomputedifthegeometry,mass,andmechanicalresonantfrequenciesofasuitable(rectangular,cylindrical,ordiscgeometry)testspecimenofthatmaterialcanbemeasured.DynamicYoung''smodulusisdeterminedusingtheresonantfrequencyintheflexuralmodeofvibration.Thedynamicshearmodulus,ormodulusofrigidity,isfoundusingtorsionalresonantvibrations.DynamicYoung''smodulusanddynamicshearmodulusareusedtocomputePoisson''sratio.1.2Thistestmethodmeasuresthefundamentalresonantfrequencyoftestspecimensofsuitablegeometrybyexcitingthemmechanicallybyasingularelasticstrikewithanimpulsetool.Specimensupports,impulselocations,andsignalpick-uppointsareselectedtoinduceandmeasurespecificmodesofthetransientvibrations.Atransducer(forexample,contactaccelerometerornon-contactingmicrophone)......
【中国标准分类号】:Q32
【国际标准分类号】:81_060_99
【页数】:17P.;A4
【正文语种】:英语