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结构在复杂载荷作用下的弹塑性响应的计算问题,因诸如反应堆高压容器等工程结构对力学分析的较高要求,正逐渐得到人们注意。本文简述了作者所采用的能描述材料卸载特性的本构关系,并用该关系对一个实际结构进行了弹塑性分析,所得的该结构在循环载荷作用下的应力、应变的循环变化规律及结构上某点在一个循环过程中所耗散的塑性功等结果,对进一步研究复杂加载下的结构的响应和判断工程构件的安全性能在理论上和实践中均有探索性的意义。
The calculation of the elastic-plastic response of the structure under complicated loads is getting more and more attention due to the high requirements on the mechanical analysis of engineering structures such as reactor high pressure vessels. In this paper, the constitutive relation that can be used by the author to describe the unloading characteristics of materials is briefly described. Based on this relationship, an elastic-plastic analysis of an actual structure is carried out. The resulting cyclic variation of stress and strain under cyclic loading and structure The results of the plastic work dissipated in a cycle at a certain point are of significance in both theory and practice for further studying the response of structures under complicated loading and judging the safety performance of engineering components.