Development of a unified viscoplasticity constitutive model based on classical plasticity theory  

作　　者：GUAN Ping LIU ChangChun Lü HeXiang 

机构地区：[1]College of Architectural Engineering,Dalian University,Dalian 116622,China [2]State Key Laboratory of Structural Analysis for Industrial Equipment,Dalian University of Technology,Dalian 116024,China

出　　处：《Science China(Technological Sciences)》2009年第5期1248-1253,共6页中国科学（技术科学英文版）

基　　金：Supported by the National Natural Science Foundation of China (Grant No. 90410012)

摘　　要：The traditional unified viscoplasticity constitutive model can be only applied to metal materials.The study of the unified constitutive theory for metal materials has discovered the correlation between the classical plasticity theory and the unified viscoplasticity constitutive model,thus leading to the con-cepts of the classic plastic potential and yield surface in the unified constitutive model.Moreover,this research has given the continuous expression of the classical plastic multiplier and presented the corresponding constructive method,which extends its physical significance and lays down a good foundation for the application of the unified constitutive theory to the material analysis in more fields.This paper also introduces the unified constitutive model for metal materials and geo-materials.The numerical simulation indicates that the construction should be both reasonable and practical.The traditional unified viscoplasticity constitutive model can be only applied to metal materials. The study of the unified constitutive theory for metal materials has discovered the correlation between the classical plasticity theory and the unified viscoplasticity constitutive model, thus leading to the concepts of the classic plastic potential and yield surface in the unified constitutive model. Moreover, this research has given the continuous expression of the classical plastic multiplier and presented the corresponding constructive method, which extends its physical significance and lays down a good foundation for the application of the unified constitutive theory to the material analysis in more fields. This paper also introduces the unified constitutive model for metal materials and geo-materials. The numerical simulation indicates that the construction should be both reasonable and practical.

关 键 词：VISCOPLASTICITY CLASSICAL PLASTICITY UNIFIED CONSTITUTIVE model plastic potential YIELD surface 

分 类 号：TG113.253[金属学及工艺—物理冶金]