軟鋼捧の圧縮縦衝撃の解析と実験の比較

概要

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An annealed mild steel bar (250 mm in length, 14 mm in dia.) was subjected to compressive impact at various velocities. The experimental results showed that the mild steel possessed particular deformation behavior such as a delayed yieding phenomenon and an appearrance of local residual strain in the neighborhood of the impact end. In addition the analysis of dynamic behavior of the mild steel was made by using a Malvern-type constitutive equation proposed by the authoes. From the comparison of the numerical results with the experimental results, it became clear that the experimental phenomena were explainable by the present analysis which takes into accounta high strain rate sensitivity for the yield point. It was also found that the effect of strain-rate dependence on the deformation behavior of the bar was large.
1985-12-15