Simulation of sheet metal extrusion processes with Arbitrary Lagrangian-Eulerian method

来源期刊:中国有色金属学报(英文版)2008年第5期

论文作者:庄新村 赵震 向华 李从心

文章页码:1172 - 1176

Key words:sheet metal forming; Arbitrary Lagrangian-Eulerian method; extrusion; mesh smoothing; remapping

Abstract: An Arbitrary Lagrangian-Eulerian(ALE) method was employed to simulate the sheet metal extrusion process, aiming at avoiding mesh distortion and improving the computational accuracy. The method was implemented based on MSC/MARC by using a fractional step method, i.e. a Lagrangian step followed by an Euler step. The Lagrangian step was a pure updated Lagrangian calculation and the Euler step was performed using mesh smoothing and remapping scheme. Due to the extreme distortion of deformation domain, it was almost impossible to complete the whole simulation with only one mesh topology. Therefore, global remeshing combined with the ALE method was used in the simulation work. Based on the numerical model of the process, some deformation features of the sheet metal extrusion process, such as distribution of localized equivalent plastic strain, and shrinkage cavity, were revealed. Furthermore, the differences between conventional extrusion and sheet metal extrusion process were also analyzed.

基金信息:the National Natural Science Foundation of China
the Research Fund for the Doctoral Program of Higher Education of China

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