初期たわみを有する弾塑性棒の衝撃座屈 : 第2報, 細長比30〜100の棒に対する数値解析および実験

概要

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The dynamic elastic-plastic buckling behavior is analyzed numerically for a bar with initial deflection, whose end is struck by a rigid heavy hammer. The bending moment for each cross-section is evaluated by integrating the stress distribution over the section. The governing partial differential equations are approximated by means of finite-difference equations. It is shown that compressive and tensile plastic regions appear at the middle length of the bar even if the struck end remains elastic. The limiting velocity, which corresponds to the incipience of plasticity, for the bar of the large initial deflection or slenderness ratio is found to be low in comparison with one for a straight bar. The numerical results are in good agreement with the experimental results on aluminum bars.
社団法人日本機械学会の論文
1986-09-25