Title of article :
Modelingelasto-plasticbehaviorofpolycrystallinegrainstructureofsteelsatmesoscopiclevelOriginalResearchArticle
Author/Authors :
MarkoKova?، نويسنده , , LeonCizelj، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2005
Abstract :
Themultiscalemodelisproposedtoexplicitlyaccountfortheinhomogeneousstructureofpolycrystallinematerials.GrainsandgrainboundariesaremodeledexplicitlyusingVoronoitessellation.Theconstitutivemodelofcrystalgrainsutilizesanisotropicelasticityandcrystalplasticity.Commerciallyavailablefiniteelementcodeisappliedtosolvetheboundaryvalueproblemdefinedatthemacroscopicscale.Noassumptionregardingthedistributionofthemesoscopicstrainandstressfieldsisused,apartthefiniteelementdiscretization.Theproposedmodelisthenusedtoestimatetheminimumsizeofpolycrystallineaggregateofselectedreactorpressurevesselsteel(22NiMoCr37),abovewhichitcanbeconsideredmacroscopicallyhomogeneous.Elasticandrate-independentplasticdeformationmodesareconsidered.Theresultsarevalidatedbytheexperimentalandsimulationresultsfromtheliterature.
Journal title :
Nuclear Engineering and Design Eslah
Journal title :
Nuclear Engineering and Design Eslah
