BS 7F 35-1985 航空航天用亚麻编织的系绳规范
时间:2024-05-11 23:02:42 来源: 标准资料网 作者：标准资料网 阅读：9614
【英文标准名称】:Specificationforbraidedlinen(flax)lacingcordforaerospacepurposes
【原文标准名称】:航空航天用亚麻编织的系绳规范
【标准号】:BS7F35-1985
【标准状态】:作废
【国别】:英国
【发布日期】:1985-01-31
【实施或试行日期】:1985-01-31
【发布单位】:英国标准学会(BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:编带;织物整理;纺织产品;作标记;天然纤维;编织绳;亚麻;线(纺织品);天然纤维绳;软索;航空运输工程
【英文主题词】:braidedcords;naturalfibres;textileproducts;airtransportengineering;flax;natural-fibreropes;thread(textiles);textilefinishing;braid;cords;marking
【摘要】:
【中国标准分类号】:V13
【国际标准分类号】:49_025_60
【页数】:8P;A4
【正文语种】:英语
【英文标准名称】:StandardPracticeforDeterminingResidualStressesinExtrudedorMoldedSulfonePlastic(SP)PartsbyImmersioninVariousChemicalReagents
【原文标准名称】:通过浸入各种化学试剂中测定挤压或模铸砜塑料件中残余应力的标准实施规程
【标准号】:ASTMD7474-2008
【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】:D20.15
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:liquidreagent;PESU;PPSU;PSU;residualstress;SP;stresscracking
【摘要】:Thermoplasticmoldingscontainresidualstressesduetodifferentialcoolingratesthroughthethicknessofthemolding.Changesinresidualstresshavebeenfoundtooccurwithtimeaftermoldingduetostressrelaxation.Manypartperformanceparametersaswellaspartfailuresareaffectedbythelevelofresidualstresspresentinapart.Residualstressescauseshrinkage,warpage,andadecreaseinenvironmentalstresscrackresistance.Thispracticeestimatestherelativemagnitudeofresidualstressesinpartsproducedfromtheseriesofsulfoneplastics(SP),namelypolysulfone(PSU),polyethersulfone(PESU),andpolyphenylsulfone(PPSU)materials.Nodirectcorrelationhasbeenestablishedbetweentheresultsofthedeterminationofresidualstressesbythispracticeandpartperformanceproperties.Forthisreason,thispracticeisnotrecommendedasasubstituteforothertests,norisitintendedforuseinpurchasingspecificationsforparts.Despitethislimitation,thispracticedoesyieldinformationofvalueinindicatingthepresenceofresidualstressesandtherelativequalityofplasticparts.Residualstressescannotbeeasilycalculated,henceitisimportanttohaveanexperimentalmethod,suchasthispractice,toestimateresidualstresses.ThispracticeisusefulforextrudersandmolderswhowishtoevaluateresidualstressesinSPparts.Thiscanbeaccomplishedbyvisualexaminationafterimmersioninoneormorechemicalreagentstoevaluatewhetherornotcrackingoccurs.Stresseswillrelaxaftermoldingorextrusion.Accordingly,bothimmersioninthetestmediumandvisualexaminationmustbemadeatidenticaltimesandconditionsafterprocessing,ifcomparingparts.Itisimportanttonotethedifferencesinparthistory.Thus,thistechniquemaybeusedasanindicationforqualityofplasticprocessing.Thepracticeisusefulprimarilyforindicatingresidualstressesnearthesurface.1.1ThispracticecoverstheevaluationofresidualstressesinextrudedprofileormoldedSPparts.Thepresenceandrelativemagnitudeofresidualstressesareindicatedbythecrazingofthespecimenpartuponimmersioninoneormoreofaseriesofchemicalreagents.ThespecifiedchemicalreagentswerepreviouslycalibratedbyuseofEnvironmentalStressCracking(ESC)techniquestocausecrazinginsulfoneplastics(SP)atspecifiedstresslevels.1.2Thispracticeappliesonlytounfilledinjectionmoldingandextrusiongradematerialsofhighmolecularweightasindicatedbythefollowingmeltflowrates:PSU9g/10min,max.,PESU30g/10m,max,andPPSU25g/10min,max.Lowermolecularweight(highermeltflow)materialswillcrazeatlowerstresslevelsthanindicatedinTables1-3.(SeeSpecificationD6394formeltflowrateconditions.)1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.Note18212;ThereisnoequivalentISOstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:G31
【国际标准分类号】:83_080_01
【页数】:4P.;A4
【正文语种】:英语
【英文标准名称】:Communicationcables-Specificationsfortestmethods-Part4-2:Environmentaltestmethods;Waterpenetration;GermanversionEN50289-4-2:2001
【原文标准名称】:通信电缆.试验方法规范.第4-2部分:环境试验方法.水浸渍
【标准号】:EN50289-4-2-2001
【标准状态】:现行
【国别】:
【发布日期】:2002-05
【实施或试行日期】:2002-05-01
【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】:模拟信号;规范;湿度偏差;数字信号;电气工程;通信电缆;防污染;阻止环境(退化);耐力;试验;耐水解;环境条件;数字的;规范(验收);模拟;水的影响;环境影响;水密;抗湿;不透水性试验;防水试验;材料试验;传播技术;电缆
【英文主题词】:Analogue;Analoguesignals;Cables;Communicationcables;Communicationtechnology;Digital;Digitalsignals;Electricalengineering;Environmentalcondition;Environmentalconditions;Environmentaleffect;Environmentalresistance;Environmentalsustainability;Humidityaffects;Hydrolyticresistance;Influenceofwater;Materialstesting;Moistureresistance;Resistance;Specification;Specification(approval);Testing;Water-resistancetests;Watertightness;Watertightnesstests
【摘要】:
【中国标准分类号】:K13
【国际标准分类号】:33_120_10
【页数】:8P.;A4
【正文语种】:英语