HEXAHEDRAL ELEMENT REFINEMENT FOR THE PREDICTION- CORRECTION ALE FEM SIMULATION OF 3D BULKINGFORMING PROCESS  

作　　者：J.Chen Y.X.Wang W.P.Dong X.Y.Ruan 

机构地区：[1]DepartmentofPlasticityEngineering,ShanghaiJiaotongUniversity,Shanghai200030,China

出　　处：《Acta Metallurgica Sinica(English Letters)》2004年第6期923-927,共5页金属学报（英文版）

基　　金：the National Natural Science Foundation of China(No.50275094).

摘　　要：Based on the characteristics of 3D bulk forming process, the arbitrary Lagrangian-Eulerian (ALE) formulation-based FEM is studied, and a prediction-correction ALE-based FEM is proposed which integrates the advantages of precisely predicting the boundary configuration of the deformed material, and of efficiently avoiding hexahedron remeshing processes. The key idea of the prediction-correction ALE FEM is elaborated in detail. Accordingly, the strategy of mesh quality control, one of the key enabling techniques for the 3D bulk forming process numerical simulation by the prediction-correction ALE FEM is carefully investigated, and the algorithm for hexahedral element refinement is formulated based on the mesh distortion energy.Based on the characteristics of 3D bulk forming process, the arbitrary Lagrangian-Eulerian (ALE) formulation-based FEM is studied, and a prediction-correction ALE-based FEM is proposed which integrates the advantages of precisely predicting the boundary configuration of the deformed material, and of efficiently avoiding hexahedron remeshing processes. The key idea of the prediction-correction ALE FEM is elaborated in detail. Accordingly, the strategy of mesh quality control, one of the key enabling techniques for the 3D bulk forming process numerical simulation by the prediction-correction ALE FEM is carefully investigated, and the algorithm for hexahedral element refinement is formulated based on the mesh distortion energy.

关 键 词：prediction-correction ALE FEM 3D bulk forming numerical simulation HEXAHEDRON mesh refinement 

分 类 号：TG113.1[金属学及工艺—物理冶金] TG174.1[金属学及工艺—金属学]