Fatigue Analysis in the Ansys Workbench Environment.pdf

《Fatigue Analysis in the Ansys Workbench Environment.pdf》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、FatigueAnalysisintheAnsysWorkbenchEnvironmentD.AlfredHancq,AnsysInc.,May2003Contents1.Introduction2.Materials2.1.Stress-LifeDataOptions3.Analysis3.1.Loading3.1.1.ConstantAmplitude,ProportionalLoading3.1.2.Non-ConstantAmplitude,ProportionalLoading3.1.3.ConstantAmplitude,Non-Proportional

2、Loading3.1.4.Non-ConstantAmplitude,Non-ProportionalLoading3.2.LoadEffects3.2.1.MeanStressCorrection3.2.2.MultiaxialStressCorrection3.3.MiscellaneousAnalysisOptions4.Results4.1.FatigueLife4.2.FatigueDamage4.3.FactorofSafety4.4.StressBiaxiality4.5.EquivalentAlternatingStress4.6.FatigueSe

3、nsitivityChart4.7.RainflowMatrixChart4.8.DamageMatrixChart5.TypicalUseCases5.1.ConnectingRodUnderFullyReversedLoading5.2.ConnectingRodUnderRandomLoading5.3.UniversalJointUnderCombinedTorsionandBending6.AdditionalFatigueResourcesandRevisionHistory1.IntroductionItisestimatedthat50-90%ofs

4、tructuralfailureisduetofatigue,thusthereisaneedforqualityfatiguedesigntools.However,theavailabilityofcommercialfatiguetoolsislimitedwhiletheonesthatareavailableareusuallyquiteexpensiveanddifficulttouseinthehandsofadesigner.Itishopedthatthesedesigners,givenaproperlibraryoffatiguetools,c

5、ouldquicklyandaccuratelyconductafatigueanalysissuitedtotheirneedsinafriendlyandwellstructuredenvironment.Fatiguewasinitiallyintroducedasanewcapabilityatversion6.0.Itsfocushasbeentoprovideusefulinformationtothedesignengineerwhenfatiguefailuremaybeaconcern.Fatigueresultscanhaveaconvergen

6、ceattached.Currently,astress-lifeapproachhasbeenadoptedforconductingafatigueanalysis.Severaloptionssuchasaccountingformeanstressandloadingconditionsareavailable.Afatigueanalysiscanbeseparatedinto3areas:materials,analysis,andresultsevaluation.Eachareawillbediscussedinmoredetailbelow:2.M

7、aterialsAlargepartofafatigueanalysisisgettinganaccuratedescriptionofthefatiguematerialproperties.Sincefatigueissoempirical,samplefatiguecurvesareincludedonlyforstructuralsteelandaluminummaterials.Thesepropertiesareincludedasaguideonlywithintentfortheusertoprovidehis/herownfatiguedata