Releasing algorithm for volumetric locking in metal forming process simulation based on element-free Galerkin method

摘要：

The meshless methods effectively deal with large material distortion simulation. Based on the rigid (visco)plastic material model, the element-free Galerkin method (EFGM) is introduced to simulate the metal forming processes. Aiming at the volume locking and pressure oscillation during EFGM analysis, a volumetric strain rate mapping method is proposed based on pressure projection method. The releasing algorithm is established by modifying the volumetric strain rate in the functional equation. The volumetric strain rate calculated according to velocity field is mapped onto a lower-order space to reduce the number of independent discrete constrain equations. The numerical example shows that the releasing algorithm can effectively eliminate the volumetric locking and pressure oscillation without the expense of employing large support size in the rigid-plastic meshless method.

关键词： metal forming element-free Galerkin method volumetric locking pressure oscillation

作者: Guan Yanjin Wu Xin Zhao Guoqun Lu Ping

作者单位: Mold & Die Engineering Technology Research Center, Shandong University, Jinan 250061, China School of Mechanical engineering, Hangzhou Dianzi University,Hangzhou 310018, China

会议类型: 国际会议

会议名称: The Fifth International Conference on Physical and Numerical Simulation of Materials Processing(第五届材料与热加工物理模拟及数值模拟国际会议)

会议地点: 郑州

会议语种:英文

在线出版日期: 2007-10-23（万方平台首次上网日期，不代表论文的发表时间）