Studies on anisotropic yield characteristics and press formability of metal sheets. (Investigations into pure stretch-forming).

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  • 金属薄板の降伏特性とプレス成形性　　純粋張出し成形の検討
  • キンゾク ウスイタ ノ コウフク トクセイ ト プレス セイケイセイ ジュン

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Based on Bassani yield criterion, a computer simulation of axi-symmetrical pure stretch-forming is attempted. A method for estimating the coefficient of friction necessary for the calculation is presented by extending Hill's method. The results calculated for four kinds of metal sheets are compared with the experimental data. The strain distribution and the farcture position are found to be sensitive to the shape of the yield locus, that is, anisotropic yielding, and it is concluded that the Bassani criterion is much more useful for the simulation than Hill's old criterion.

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