摘要
构造了20参数圆柱壳拟协调单元,同时采用分层模型的弹塑性稳定性分析.根据塑性屈曲的Stowell形变理论,用基于切线刚度矩阵的增量法和修正的Newton-Raphson方法,计算屈曲前的弹塑性内力分布,并用逆幂迭代法求解弹塑性屈曲荷载.
A quasi-conforming element is developed in this paper. A layer model is introduced to shell elasto-plastic buckling analysis. Both the incremental method with the tangent stiffness and modified Newton-Raphson method are used to compute the pre-buckling stress distribution in elastic and plasti ranges. A bifurcation analysis is preformed by using Stowell' s deformation theory.
出处
《应用力学学报》
CAS
CSCD
北大核心
1993年第1期106-110,共5页
Chinese Journal of Applied Mechanics
关键词
弹塑性
屈曲
圆柱壳
结构力学
plate and shell structures
elasto-plastic buckling
quasi-conforming element.
