MESHFREE METHOD BASED ON POINT COLLOCATION FOR METAL FORMING SIMULATION  

作　　者：H.Y. Wen X.H. Dong X.Y. Ruan 

机构地区：[1]Department of Plasticity Forming Engineering, Shanghai Jiaotong University, Shanghai 200030, China

出　　处：《Acta Metallurgica Sinica(English Letters)》2006年第2期79-84,共6页金属学报（英文版）

基　　金：the National Natural Science Foundation of China （No. 50275059）.

摘　　要：A meshfree method based on reproducing kernel approximation and point collocation is presented for analysis of metal ring compression. The point collocation method is a true meshfree method without the employment of a background mesh. It is shown that, in a point collocation approach, the remesh problem because of the mesh distortion in FEM （finite element method） and the low efficiency in Galerkin-based meshfree method are avoided. The corrected kernel functions are introduced to the stabilization of free-surface boundary conditions. The solution of symmetric ring compression problem is compared with a conventional finite element solution, and reasonable results have been obtained.A meshfree method based on reproducing kernel approximation and point collocation is presented for analysis of metal ring compression. The point collocation method is a true meshfree method without the employment of a background mesh. It is shown that, in a point collocation approach, the remesh problem because of the mesh distortion in FEM （finite element method） and the low efficiency in Galerkin-based meshfree method are avoided. The corrected kernel functions are introduced to the stabilization of free-surface boundary conditions. The solution of symmetric ring compression problem is compared with a conventional finite element solution, and reasonable results have been obtained.

关 键 词：meshfree method RKPM （reproducing kernel particle method） point collocation metal forming frictional contact 

分 类 号：TG3[金属学及工艺—金属压力加工]