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Prediction of the Plastic Strain Ratio Evolution of a Dual-phase Steel
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  • Journal title : Transactions of Materials Processing
  • Volume 24, Issue 6,  2015, pp.395-399
  • Publisher : The Korean Society for Technology of Plasticity
  • DOI : 10.5228/KSTP.24.6.395
 Title & Authors
Prediction of the Plastic Strain Ratio Evolution of a Dual-phase Steel
Ha, J.; Lee, J.W.; Lee, M. G.; Barlat, F.; Kim, J. H.;
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 Abstract
A microstructure-based finite element simulation was conducted to predict the plastic strain ratio (R-value) of a dual-phase (DP) steel. The representative volume elements (RVEs) concept was adopted for the image-based FE modeling and a 3D model was constructed using sequential 2D images. Each phase was considered with the von-Mises yield criterion and the Swift model. The Swift parameters were defined by the empirical equations based on the chemical composition. The developed model was applied to analyze the effect of residual stress on the R-value and stress distribution. In order to consider the residual stress development after cold rolling, 10 % compression was applied in the thickness direction and unloaded before the tensile stress was applied in the rolling direction. The results showed a reasonable prediction for the R-value evolution: a sharp increase at small strains was well described and a transition followed in the downward direction. The R-value evolution was analyzed using the stress distribution change on the π-plane
 Keywords
R-value;Meso-scale;Representative Volume Element;Dual-phase Steel;Finite Element Simulation;
 Language
Korean
 Cited by
 References
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