HEXAHEDRAL ELEMENT REFINEMENT FOR THE PREDICTION-CORRECTION ALE FEM SIMULATION OF 3D BULKING FORMING PROCESS
来源期刊：Acta Metallurgica Sinica2004年第6期
论文作者：W.P.Dong X.Y.Ruan Y.X.Wang J.Chen
Key words：prediction-correction ALE FEM; 3D bulk forming; numerical simulation; hexahedron; mesh refinement;
Abstract: 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.
W.P.Dong1，X.Y.Ruan1，Y.X.Wang1，J.Chen1
(1.Department of Plasticity Engineering, Shanghai Jiaotong University, Shanghai 200030, China)
Abstract: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.
Key words:prediction-correction ALE FEM; 3D bulk forming; numerical simulation; hexahedron; mesh refinement;
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