计算物理 ›› 1991, Vol. 8 ›› Issue (3): 312-318.

• 论文 • 上一篇    下一篇

四边形单元中的沙漏控制

王肖钧, 胡秀章, 刘胜求   

  1. 中国科学技术大学近代力学系, 合肥 230026
  • 收稿日期:1990-10-09 修回日期:1991-06-30 出版日期:1991-09-25 发布日期:1991-09-25

HOURGLASS CONTROL IN THE QUADRILATERAL ELEMENT

Wang Xiaojun, Hu Xiuzhang, Liu Shengqiu   

  1. Department of modern Mechanics University of Science and Technology of China
  • Received:1990-10-09 Revised:1991-06-30 Online:1991-09-25 Published:1991-09-25

摘要: 本文对四边形单元的沙漏现象作了分析。通过引入沙漏应变和沙漏应力的方法来控制弹塑性大变形中的沙漏现象。采用二维有限元Lagrange数值计算程序计算了平头弹对平板的高速撞击问题。计算结果表明本文提出的方法是有效的。

关键词: 有限元, 计算方法, 高速撞击

Abstract: The hourglass deformation in the quadrilateral element is discussed in this paper. It is shown that the hourglass modes can be controlled in the computation of large elastic plastic deformation by introducing the hourglass strains and the corresponding stresses. Numerical examples that a high velocity rod impacts a plate target are used to illustrate the effectiveness of the method by the aid of a two dimensional Lagrange program. The results show that the hourglass control proposed here is feasible.

Key words: finite element, computational method, hypervelocity impact