塑性节点法的研究及其在薄壳结构中的应用

本文采用变分原理及离散塑性流动定律假设研究了弹塑性有限元的新方法—塑性节点法及其所表示的物理意义。结果表明:该方法的物理实质是所述的塑性流动定理的离散。在一般意义下,本文对其进行了修正,典型板壳例题和复杂壳体结构的弹塑性有限元分析显示,计算结果与文献资料和实验数据符合较好。证明用文中方法进行壳体结构的弹塑性分析是行之有效的和可靠的。

Plastic Node Method and Its Application in Thin Shell Structures

The new method of elasto-plastic finite element analysis--plastic nodemethod and its physical background is studied by variational principle and assumption of discretizing plastic flow rule. It is shown that essentials of the method is the discretion of plastic flow rule and that the method is modified in general meaning. Solutions of typical plate/shell and complex shell structure show that the computed results agree to that of references and experiment quite well. It suggests .that present analysis is feasible and reliable in elasto-plastic analysis of shell structures.