弹塑性随动强化结构在动载荷下的一个安定准则

An Applicable Criterion on Dynamic Loading for ElastoPlastic Structures with Kinematic Work-Hardening

本文考虑动载荷和温度影响下，借助于分段线性加载面对弹塑性随动强化结构进行了安定分析，提出一个动力安定准则。文中提出的屈服面是由分片凸曲面构成，各屈服面的强化规律由强化系数Ｃｋｌ所确定，通过调整Ｃｋｌ可以得到几种不同的强化模型。文末又以一个交变载荷作用下的线性强化材料的商支梁为例对动力安定准则的应用进行了说明。

Considering the dynamic loading and thermal effect, the analysis is carried out for the elasto-plastic structures with kinematic work-hardening by using piece-wise linear yield surfaces and a dynamic criterion is presented in this paper. The yield surface employed is composed of a piece-wise convex surface. The work-hardening law of each yield surface is determined by the hardening coefficients Ckl, and by adjusting them, different kinds of hardening models can be obtained. Finally an example of simple-supported beam with linear work-hardening material under alternative loadings is given for the illustration of the criterion.