初期たわみを有する弾塑性棒の縦衝撃による残留変形

DOI Web Site

書誌事項

タイトル別名
  • Residual deformation of initially curved elasto-plastic bars due to longitudinal impact.
  • ショキ タワミ オ ユウスル ダンソセイボウ ノ タテショウゲキ ニ ヨル ザ

この論文をさがす

抄録

Behavior of a slightly curved bar under longitudinal impact with a heavy rigid hammer at a low velocity was analyzed numerically, and the residual deformation of the bar was investigated. Dynamic elasto-plastic deformation was discussed for the bar subjected to the plastic strain of the same order as the elastic one. Because of difficulty in obtaining a closed form of solution for this problem due to geometric and material nonlinearity, the solid bar was replaced by a lumped-parameter model, and the equations of motion were integrated numerically.<br>The stress at each point on the cross section was evaluated by taking account of a detailed deformation history of that point. The bending moment was calculated by integrating these stresses. This method has been confirmed to give more accurate results than using the conventional method for analyzing the behavior of bars of small slenderness ratios, in which the stress distribution over the cross section is highly nonlinear.<br>The residual deformation of the bar was evaluated by the residual axial displacement of the struck end. The effects of the following two factors on the residual axial displacement were investigated; the ratio of the mass of the rigid hammer to that of the bar, and the impact velocity of the rigid hammer. As the result, it was shown that the residual axial displacement was expressed by the product of the power function of the mass ratio and that of the impact velocity.

収録刊行物

  • 材料

    材料 36 (411), 1320-1323, 1987

    公益社団法人 日本材料学会

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ