【英文标准名称】:StandardTestMethodsforRubberDeterioration-CrackinginanOzoneControlledEnvironment
【原文标准名称】:臭氧可控环境中橡胶变坏龟裂的标准试验方法
【标准号】:ASTMD1149-2007
【标准状态】:现行
【国别】:
【发布日期】:2007
【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】:D11.15
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:炭黑;变坏;天然橡胶;臭氧龟裂;橡胶;表面;合成橡胶;测试
【英文主题词】:chamber;cracking;deterioration;ozone;rubber;surface;test
【摘要】:Thesignificanceofthesetestmethodsliesintheabilitytodifferentiatebetweenthedegreesofozoneresistanceunderthelimitedandspecifiedconditionsoftheacceleratedtests.Thedegreeofresistancebeingjudgedbytheappearanceandmagnitudeoftheformationofcracksinthesurfaceofthesubjectmaterial.Inservice,rubbermaterialsdeterioratewhenexposedtoozone.Itisimperativetohavetestmethodsinwhichsimple,acceleratedtime/exposure,comparisonsofthematerialx2019;sabilitytoresistcrackingcausedbyozoneexposurecanbeempiricallyevaluated.Suchtestscanbeusedforproducer/consumeracceptance,refereepurposes,research,anddevelopment.Thesemethodsarenotnecessarilysuitedforuseinpurchasespecificationsastheremaybenocorrelationwithserviceperformanceasactualserviceconditions(outdoorexposure)varywidelyduetogeographiclocationand,therefore,maynotyieldrepeatableorreproducibleresults.1.1Thesetestmethodsareusedtoestimatetheeffectofexposure,undersurfacetensilestrainconditions,eitherdynamicorstatic,inanatmospherecontainingspecifiedlevelsofozoneconcentration,expressedaspartialpressure(refertoNote1),onvulcanizedrubber,rubbercompounds,moldedorextrudedsoftrubber,andotherspecifiedmaterials,orasmaybedeterminedempirically.Theeffectofnaturallyoccurringsunlightorlightfromartificialsourcesisexcluded.1.2PreviouslypublishedASTMdocumentsTestMethodD518andTestMethodsD3395havebeenincludedinthesetestmethods,D1149,in2007.PleaserefertoNote2.1.2.1TestMethodD518andTestMethodsD3395havehenceforthbeenwithdrawnandsupersededbyTestMethodsD1149.WhenTestMethodsD1149iscited,orotherwisereferenced,anotationshallbeincludedtothiseffect.Pleaserefertosectionfortheappropriatereferences.1.3Thespecifiedconditionsofexposuretoozoneinthecontrolledenvironmentsareacceleratedincomparisontooutdoorexposure.Theseacceleratedozonetestmethodsmaynotgiveresultswhichcorrelatewithoutdoorexposuretestsorserviceperformance.1.4Allmaterials,instruments,orequipmentusedforthedeterminationofmass,force,dimension,ozoneconcentration,partialpressure,temperature,velocity,andgasexchangerateshallhavedirecttraceabilitytotheNationalInstituteforStandardsandTechnology,orotherinternationallyrecognizedorganizationparallelinnature.1.5ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesgiveninparenthesesareforinformationonly.ManyofthestatedSIunitsaredirectconversionsfromtheU.S.CustomarySystemtoaccommodatetheinstrumentation,practices,andproceduresthatexistedpriortotheMetricConversionActof1975.Thisstandardinvolveshazardousmaterials,specificallyozone.Itmayalsoinvolvehazardousoperationsandequipment.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Note1AdiscussionandexplanationregardingthemeasurementofozoneconcentrationsbaseduponpartsofozoneperunitofairversuspartialpressureisprovidedinTestMethodsD4575,specificallyAppendicesX1andX2.TestMethodsD4575isalsorecommendedasasourceofbackgroundinformationregardingstandardsinvolvingmaterialsexposedtoozone.
【中国标准分类号】:G34
【国际标准分类号】:83_060
【页数】:11P.;A4
【正文语种】:
基本信息
| 标准名称： | 汽车驾驶训练模拟器通用技术条件 |
| 英文名称： | General specification for Automobile driving training simulator |
| 中标分类： |
公路、水路运输 >>
交通管理 >>
交通管理综合 |
| 替代情况： | 被JT/T 378-2005代替 |
| 发布日期： | 1998-09-09 |
| 实施日期： | 1998-10-01 |
| 首发日期： | |
| 作废日期： | 2005-06-15 |
| 出版日期： | |
| 页数： | 9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： 公路 水路运输 交通管理 交通管理综合