Rapid Finite Element Analysis of Bulk Metal Forming Process Based on Deformation Theory  

作　　者：WANG Peng DONG Xiang-huai FU Li-jun 

机构地区：[1]Department of Plasticity Technology, Shanghai Jiao Tong University, Shanghai 200030, China

出　　处：《Journal of Iron and Steel Research International》2009年第5期23-28,42,共7页

基　　金：Sponsored by National Natural Science Foundation of China(50575143);Specialized Research Fund for Doctoral Program of Higher Education of China(20040248005)

摘　　要：The one-step finite element method （FEM）, based on plastic deformation theory, has been widely used to simulate sheet metal forming processes, but its application in bulk metal forming simulation has been seldom investigated, because of the complexity involved. Thus, a bulk metal forming process was analyzed using a rapid FEM based on deformation theory. The material was assumed to be rigid-plastic and strain-hardened. The constitutive relationship between stress and total strain was adopted, whereas the incompressible condition was enforced by penalty function. The geometrical non-linearity in large plastic deformation was taken into consideration. Furthermore, the force boundary condition was treated by a simplified equivalent approach, considering the contact history. Based on constraint variational principle, the deformation FEM was proposed. The one-step forward simulation of axisymmettic upsetting process was performed using this method. The results were compared with those obtained by the traditional incremental FEM to verify the feasibility of the proposed method.The one-step finite element method （FEM）, based on plastic deformation theory, has been widely used to simulate sheet metal forming processes, but its application in bulk metal forming simulation has been seldom investigated, because of the complexity involved. Thus, a bulk metal forming process was analyzed using a rapid FEM based on deformation theory. The material was assumed to be rigid-plastic and strain-hardened. The constitutive relationship between stress and total strain was adopted, whereas the incompressible condition was enforced by penalty function. The geometrical non-linearity in large plastic deformation was taken into consideration. Furthermore, the force boundary condition was treated by a simplified equivalent approach, considering the contact history. Based on constraint variational principle, the deformation FEM was proposed. The one-step forward simulation of axisymmettic upsetting process was performed using this method. The results were compared with those obtained by the traditional incremental FEM to verify the feasibility of the proposed method.

关 键 词：bulk metal forming finite element method （FEM） deformation theory rapid simulation 

分 类 号：O184[理学—数学] TQ336.1[理学—基础数学]