JT/T 226-1996 汽车制动液检测规范
作者:标准资料网 时间:2024-05-20 12:43:05 浏览:9766
来源:标准资料网
基本信息
| 标准名称： | 汽车制动液检测规范 |
| 英文名称： | Testing specification for automobile brake fluid |
| 中标分类： |
石油 >>
石油产品 >>
液压油液 |
| 发布日期： | 1996-07-26 |
| 实施日期： | 1996-12-01 |
| 首发日期： | |
| 作废日期： | 2006-06-23 |
| 出版日期： | |
| 页数： | 5页 |
适用范围
没有内容
前言
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目录
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引用标准
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所属分类： 石油 石油产品 液压油液
【英文标准名称】:StandardTestMethodforMeasurementofFatigueCrackGrowthRates
【原文标准名称】:疲劳裂缝增大率测量用测试方法
【标准号】:ASTME647-2008e1
【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】:E08.06
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:constantamplitude;cracksize;fatiguecrackgrowthrate;stressintensityfactorrange;Cracking--crackgrowth;Constant-load-amplitudefatiguecrackgrowthrates;Fatigue
【摘要】:Fatiguecrackgrowthrateexpressedasafunctionofcrack-tipstress-intensityfactorrange,da/dNversusx0394;K,characterizesamaterial''sresistancetostablecrackextensionundercyclicloading.Backgroundinformationontheration-aleforemployinglinearelasticfracturemechanicstoanalyzefatiguecrackgrowthratedataisgiveninRefs(1)and(2).1.1Thistestmethodcoversthedeterminationoffatiguecrackgrowthratesfromnear-thresholdtoKmaxcontrolledinstability.Resultsareexpressedintermsofthecrack-tipstress-intensityfactorrange(x0394;K),definedbythetheoryoflinearelasticity.1.2Severaldifferenttestproceduresareprovided,theoptimumtestprocedurebeingprimarilydependentonthemagnitudeofthefatiguecrackgrowthratetobemeasured.1.3Materialsthatcanbetestedbythistestmethodarenotlimitedbythicknessorbystrengthsolongasspecimensareofsufficientthicknesstoprecludebucklingandofsufficientplanarsizetoremainpredominantlyelasticduringtesting.1.4Arangeofspecimensizeswithproportionalplanardimensionsisprovided,butsizeisvariabletobeadjustedforyieldstrengthandappliedforce.Specimenthicknessmaybevariedindependentofplanarsize.1.5ThedetailsofthevariousspecimensandtestconfigurationsareshowninAnnexA1-AnnexA3.Specimenconfigurationsotherthanthosecontainedinthismethodmaybeusedprovidedthatwell-establishedstress-intensityfactorcalibrationsareavailableandthatspecimensareofsufficientplanarsizetoremainpredominantlyelasticduringtesting.1.6Residualstress/crackclosuremaysignificantlyinfluencethefatiguecrackgrowthratedata,particularlyatlowstress-intensityfactorsandlowstressratios,althoughsuchvariablesarenotincorporatedintothecomputationofx0394;K.1.7ValuesstatedinSIunitsaretoberegardedasthestandard.Valuesgiveninparenthesesareforinformationonly.1.8Thistestmethodisdividedintotwomainparts.Thefirstpartgivesgeneralinformationconcerningtherecommendationsandrequirementsforfatiguecrackgrowthratetesting.Thesecondpartiscomposedofannexesthatdescribethespecialrequirementsforvariousspecimenconfigurations,specialrequirementsfortestinginaqueousenvironments,andproceduresfornon-visualcracksizedetermination.Inaddition,thereareappendicesthatcovertechniquesforcalculatingda/dN,determiningfatiguecrackopeningforce,andguidelinesformeasuringthegrowthofsmallfatiguecracks.Generalinformationandrequirementscommontoallspecimentypesarelistedasfollows:
【中国标准分类号】:H22
【国际标准分类号】:77_040_10
【页数】:45P.;A4
【正文语种】:英语
