THE PARAMETRIC VARIATIONAL PRINCIPLE FOR PERZYNA MODEL IN VISCOPLASTICITY  

作　　者：曾攀 钟成勰 

机构地区：[1]Research Institute of Engineering Mechanics, Dalian University of Technology, Dalian

出　　处：《Applied Mathematics and Mechanics(English Edition)》1991年第5期433-437,共5页应用数学和力学（英文版）

摘　　要：This paper presents the parametric variational principle for Perzyna model which is one of the main constitutive relations of viscoplasticity.The principle,by which the potential energy function is minimized under a constrained condition transformed by the constitutive relations of viscoplasticity, is free from the bound of Drucker's postulate of plastic flow and consequently suitable for solving the nonassociated plastic flow problems. Furthermore, the paper has proven the presented principle and discussed the creep problem.This paper presents the parametric variational principle for Perzyna model which is one of the main constitutive relations of viscoplasticity.The principle,by which the potential energy function is minimized under a constrained condition transformed by the constitutive relations of viscoplasticity, is free from the bound of Drucker's postulate of plastic flow and consequently suitable for solving the nonassociated plastic flow problems. Furthermore, the paper has proven the presented principle and discussed the creep problem.

关 键 词：VISCOPLASTICITY parametric variational principle creep 

分 类 号：O3，O1[理学—力学]