DIN 3990-11-1989 圆柱齿轮承载能力的计算.工业传动应用标准.详细方法
时间:2024-05-15 20:17:30 来源: 标准资料网 作者：标准资料网 阅读：8572
【英文标准名称】:Calculationofloadcapacityofcylindricalgears;applicationstandardforindustrialgears;detailedmethod
【原文标准名称】:圆柱齿轮承载能力的计算.工业传动应用标准.详细方法
【标准号】:DIN3990-11-1989
【标准状态】:现行
【国别】:德国
【发布日期】:1989-02
【实施或试行日期】:
【发布单位】:德国标准化学会(DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:荷载能力;齿形;正齿轮;齿轮传动;齿轮箱;数学计算
【英文主题词】:Gearboxes;Geardrives;Loadcapacity;Mathematicalcalculations;Spurgears;Toothprofiles
【摘要】:Thisstandardspecifiesmethodsforthecalculationofsurfacedurabilityandtoothstrengthofcylindricalinvolutegearsforindustrialgears.Thestandardappliestospur,helical,anddoublehelicalgearswithorwithoutmodificationsoftoothprofileandhelixcorrections.Itprimarilyappliestooillubricatedgears.
【中国标准分类号】:J17
【国际标准分类号】:21_200
【页数】:39P;A4
【正文语种】:德语
【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
【英文标准名称】:TestMethodforDeterminingtheResistanceofLubricatingGreasetoWaterSpray
【原文标准名称】:润滑脂耐水喷射性的测定方法
【标准号】:ASTMD4049-1993
【标准状态】:作废
【国别】:美国
【发布日期】:1993
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:ASTM
【标准类型】:()
【标准水平】:()
【中文主题词】:试验;石油产品;润滑剂;润滑脂;耐水解
【英文主题词】:lubricants;testing;petroleumproducts;grease;hydrolyticresistance
【摘要】:
【中国标准分类号】:E36
【国际标准分类号】:75_100
【页数】:4P;A4
【正文语种】:英语