215202 Multi-phase-field理論および転位-結晶塑性論に基づく動的再結晶モデルの構築とそのシミュレーション(OS08 マルチディシプリナリ・デザイン科学2(材料と流体のマルチフィジックス解析),オーガナイズド・セッション)

概要

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In the previous work, the authors developed a dynamic recrystallzation model by coupling the multi-phase-field and the dislocation-crystal plasticity models. Also, a calculation was performed using that model. However, since the free energy of bulk in conventional multi-phase-field model is adopted, the stored dislocation energy is not considered as a driving force of recrystallization. So as to work out this problem, a new double well potential is proposed in this study. This potential function represents the energy of dislocations stored locally in matrix that starts nuclei growing. In addition, the multi-phase-field model with the new double well potential is coupled with the dislocation-crystal plasticity model through the order parameter and the dislocation density. The developed model can be regarded as not only a multiphysics model but also a multiscale one. Furthermore, a simulation is carried out based on the present model to reproduce the nucleus growth and crystal deformation simultaneously.
一般社団法人日本機械学会の論文
2011-03-17