Numerical modeling and simulation of metal powder compaction of balancer

被引:3
|
作者
Li Yuan-yuan [1 ]
Chen Pu-qing [1 ]
Xia Wei [1 ]
Zhou Zhao-yao [1 ]
Li Wen-fang [1 ]
机构
[1] S China Univ Technol, Coll Mech Engn, Guangzhou 510640, Peoples R China
基金
中国国家自然科学基金;
关键词
balancer; powder compaction; numerical simulation; finite element; mechanical model;
D O I
10.1016/S1003-6326(06)60088-5
中图分类号
TF [冶金工业];
学科分类号
0806 ;
摘要
The constitutive relation of powder material was derived based on the assumption that metal powder is a kind of elasto-plastic material, complying with an elliptical yield criterion. The constitutive integration algorithm was discussed. A way to solve the elastic strain increment in each iteration step during elasto-plastic transition stage was formulated. Different integration method was used for elastic and plastic strain. The relationship between model parameters and relative density was determined through experiments. The model was implemented into user-subroutines of Marc. With the code, computer simulations for compaction process of a balancer were performed. The part is not axisymmetric and requires two lower punches and one upper punch to form. The relative density distributions of two design cases, in which different initial positions of the punches were set, were obtained and compared. The simulation results indicate the influence of punch position and movement on the density distribution of the green compacts.
引用
收藏
页码:507 / 510
页数:4
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