初期たわみを有する弾塑性棒の衝撃座屈 : 第3報,残留変形の数値解析および実験

概要

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The longitudinal impact of a slightly curved bar by a rigid hammer is analyzed numerically, and the residual deformation of the bar is investigated. The dynamic elasto-plastic deformation behavior, for the time after reimpacts as well as the first impact, is discussed for a bar subjected to a plastic strain of the same order as the elastic. The governing partial differential equations are approximated by means of finite-difference equations. The residual deformation of the bar was evaluated by the residual axial displacement of the struck end. As a result, it was shown that the residual axial displacement was expressed by the product of the power function of the mass ratio of the rigid hammer to the bar and that of the impact velocity. The experimental results on aluminum bars were in good agreement with the numerical results.
1988-01-25