摘要
本文研究刚粘塑性圆环受法向冲击时的动力屈曲,文中考虑了冲击过程中圆环厚度的变化,环向力的变化以及基本变形速度的变化。通过用数值方法求解扰动运动微分方程,结果表明,当规定了临界放大函数后,仅当冲击速度位于某一范围之内时,才会发生动力屈曲。
In this paper, the dynamic buckling of a rigid-viscoplastic ring under external impulsive loading is investigated. The change of the thickness of the ring, the hoop comoressive stress and the basic deformation velocity all have been taken into account. Numerical solution for the governing equation of dynamics shows that the dynamic buckling of the ring will be oc-cured in a certain range of impact velocity in the specified critical amplify function.
出处
《上海力学》
CSCD
1996年第2期142-146,共5页
Chinese Quarterly Mechanics
基金
国家自然科学基金
上海交通大学科学基金
关键词
冲击屈曲
粘塑性
圆环
impact buckling, rigid-viscoplastic body, ring.
