244 ポリエチレンのひずみ制御多軸非弾性変形のシミュレーション(塑性構成式・FEM,OS06 ポリマの変形と破壊に関するモデリングとシミュレーション)

概要

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Inelastic deformations of Polyethylene under total strain control in proportional and non-proportional strain paths in a biaxial state of stress were simulated by a viscoplastic constitutive equation proposed by the present authors. The constitutive equation was formulated by combining the kinematic hardening creep theory of Malinin and Khadjinsky with the nonlinear kinematic hardening rule of Armstrong and Frederick. The nonlinear kinematic hardening rule was modified by a loading surface defined in a viscoplastic strain space and a new parameter using the loading surface. The simulation was performed by the total strain control in various strain paths under cyclic conditions, and the response of normal and shear stresses were compared with experimental results of polyethylene. Then the validity of the constitutive equation was discussed.
社団法人日本機械学会の論文
2006-11-02