DIN-743-4-2012-ENG-轴载荷计算

December2012TranslationbyDIN-Sprachendienst.Englishpricegroup8NopartofthistranslationmaybereproducedwithoutpriorpermissionofDINDeutschesInstitutfürNormunge.V.,Berlin.BeuthVerlagGmbH,10772Berlin,Germany,hastheexclusiverightofsaleforGermanStandards(DIN-Normen).ICS21.120.10!%,d.2096511–Part4:Fatiguelimit,endurancelimit–Equivalentlydamagingcontinuousstress,EnglishtranslationofDIN743-4:2012-12TragfähigkeitsberechnungvonWellenundAchsen–Teil4:Zeitfestigkeit,Dauerfestigkeit–SchädigungsäquivalenteSpannungsamplitude,EnglischeÜbersetzungvonDIN743-4:2012-12Calculdelacapacitédesarbresetaxes–Partie4:Résistanceàlafatiguepouruneduréedevielimitée,résistanceàlafatiguepouruneduréedevieillimitée–Amplitudedecontraintepourendommagementéquivalent,TraductionanglaisedeDIN743-4:2012-12©`,`,`,,,,,,```,`````,,,`````,,-`-`,,`,,`,`,,`---DIN743-4:2012-102Acommaisusedasthedecimalmarker.ContentsPageForeword..............................................................................................................................................................31Scope......................................................................................................................................................42Normativereferences............................................................................................................................43Symbols,designationsandunits.........................................................................................................44Calculation..............................................................................................................................................54.1General....................................................................................................................................................54.2Singledirectionofloading....................................................................................................................54.2.1Calculationofsafetyfactorfortime-constantamplitudeinthelimitedlifestrengthdomain....................................................................................................................................................54.2.2Calculationofsafetyfactorforloadspectrainthelimitedlifestrengthandfatiguestrengthdomains...................................................................................................................................................74.3Combinedloads..................................................................................................................................10Bibliography.....................................................................................................................................................11FiguresFigure1—LimitedlifestrengthvalueσANK....................................................................................................6Figure2—MethodaccordingtoMiner–extended.......................................................................................8--`,`,`,,,,,,```,`````,,,`````,,-`-`,,`,,`,`,,`---DIN743-4:2012-103ForewordThisstandardhasbeenpreparedbyWorkingCommitteeNA060-34-32AAWellen-undWelle-Nabe-VerbindungenofSectionAntriebstechnikoftheNormenausschussMaschinenbau(MechanicalEngineeringStandardsCommittee)inDIN.DIN743,Calculationofloadcapacityofshaftsandaxlescomprises:Part1:GeneralPart2:TheoreticalstressconcentrationfactorsandfatiguenotchfactorsPart3:StrengthofmaterialsPart4:Fatiguelimit,endurancelimit-EquivalentlydamagingcontinuousstressSupplement1:Examplestopart1to3Supplement2:Examplestopart4--`,`,`,,,,,,```,`````,,,`````,,-`-`,,`,,`,`,,`---DIN743-4:2012-1041ScopeThisstandardappliestothecalculationandverificationofthesafetyofshaftsandaxles,inaccordancewithDIN743-1,inthelimitedlifestrengthdomain(fatiguefailure)aswellasinthelimitedlifestrengthandfatiguestrengthdomainsforloadspectrumloading.Userscanmakeuseoftheirownverifiedexperienceorresults.2NormativereferencesThefollowingreferenceddocumentsareindispensablefortheapplicationofthisdocument.Fordatedreferences,onlytheeditioncitedapplies.Forundatedreferences,thelatesteditionofthereferenceddocument(includinganyamendments)applies.DIN743-1,Calculationofloadcapacityofshaftsandaxles—Part1:General3Symbols,designationsandunitsSymbolDesignationUnitDMMinersum_iLoadbinoftheloadspectrum_jNumberofloadspectrumbins_KKLoadspectrumfactor_KCorrectednumberofloadspectrumbins_neCorrectednumberofloadcyclesinbink_niNumberofloadcyclesinbini_NDSalientpointoftheWöhlercurvebetweenthelimitedlifestrengthandfatiguestrengthdomains_NLRequirednumberofloadcycles_N*Referencenumberofloadcycles_NSSalientpointoftheWöhlercurvebetweenthequasi-staticstrengthandthelimitedlifestrengthdomain_qExponentoftheWöhlercurve_SSafetyofthecomponent_SminRequiredminimumsafetyofthecomponent_nShapeoftheloadspectrum_σzd,bADK,ttADKFatiguestrength