SIMULATION OF THE STOCHASTIC DAMAGE EVOLUTION PROCESS UNDER LOW CYCLE FATIGUE BY THE FINITE ELEMENT METHOD-中国期刊网

摘要 Anumericalsimulationofstochasticdamaseevolutionprocessintheconditionoflowcyclefatigueloadingisdiscussed.Therelationsbetweendamagevariablesandmicro-cracksareob-tainedbymeansofthemicro-mechanicsmodeloftherepresentativevolumeelementproposedbyLemaitreandDufailiy.Thestochasticinitialdamagevaluesareintroducedinconsiderationoftheinherentmicro-defectsinmaterials.Themodelcombinedwithafiniteelementmethodisappliedtosimulatethedamageevolutionprocessunderlowcyclefatigueloading.Themicro-cracksonthesurfaceofaspecimenof19Mn6alloysteelaremeasuredwithareplicatechnique.Thenumericalresultsshowthatthenor.homogeneityofdamageandthelocalizationofthefatiguefailurearewellshownbytheproposedsimulations,andthefatiguelivesarereasonablypredicted.

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SIMULATION OF THE STOCHASTIC DAMAGE EVOLUTION PROCESS UNDER LOW CYCLE FATIGUE BY THE FINITE ELEMENT METHOD

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SIMULATION OF THE STOCHASTIC DAMAGE EVOLUTION PROCESS UNDER LOW CYCLE FATIGUE BY THE FINITE ELEMENT METHOD

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