应变率敏感材料的弹粘塑性硬化模型及其应用

ELASTICVISCO-PLASTIC HARDENING MODEL FOR STRAIN RATE SENSITIVE MATERIALS AND ITS APPLICATION

本文在Perzyna弹粘塑性模型的基础上,研究了应变率的硬化效应。假设应变率不仅使加载面作各向同性的均匀胀缩,而且还使它在偏应力空间产生一个移动量,从而得到了动力加载条件,本文用此模型和Laplace变换求得了受内压作用下厚壁圆筒的封闭解。

Based on the perzyna's elasticvisco-plastic model, the hardening effects of strain rate have been studied in this paper.The dynamic loading conditions are given,assuming that the loading surfaces will be not only isot-ropic and uniform expasion or contraction but also translational motion because of strain rate in the space of deviatoric stresses. Using the model and Laplacian transform,the closed solutions of thick walled cylinder subjected to internal pressure have been obtained.