リング状プレス成形のFEM解析による最適化

概要

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The ring-shaped cup press working process is numerically analyzed by elastic-plastic shell FEM. The method used has the commercial code 'JNIKE3D' in which improved material constitutive equation, the evaluation of breakage initiation and the pressure distribution has been considered. The yield function is modified to consider the pressure effect on breakage. Numerical results for strain, breakage site, and breakage depth are in good agreement with experimental results. Moreover, the numerical results show that the forming conditions effective for preventing breakage are the use of a blank shape having the longest notch and an ellipsoidal inner cut of the slow-metal-flow area near the notch. The optimum blank shape is proposed and its applicability is proved experimentally.
社団法人日本機械学会の論文
1996-07-25