周期载荷下强化材料结构的动态安定性分析

DYNAMIC SHAKEDOWN ANALYSIS OF WORK-HARDENING STRUCTURES UNDER CYCLING LOADS Northwestern Polytechnical University

本文提出了一般强化材料结构的动态安定性定理及周期外载荷作用下的一种动态安定分析方法。本方法利用稳态虚拟弹性过程的概念、屈服面暂时局部线性化技术和逐步渐进形成自平衡应力系统方法,大量地降低问题的计算量。最后给出了几个算例。

Based on the unified hardening model, a dynamic shakedown analysis for structures under cycling loads are presented. It is described in detail that the synthetic yield surfaces are temporarily and locally linearized, and self-equilibrium synthetic stress systems are selected by the procedure of successive approximation. Through these techniques, the numbers of the variables and the constraint relations are greatly reduced. The theorem and method are applicable to a lot of work-hardening materials and the perfectly-plastic material is only a simple case of them.