Application of coupled Eulerian-Lagrangian approach in metal forming simulations

Numerical simulations of materials forming processes require both powerful computers and advanced software. Large displacements assumed in the analysis usually cause convergence problems. In the Lagrangian approach (typical for solid bodies) a remeshing is frequently necessary. This extends the computations and decreases the convergence. In such cases the application of Euler approach (typical for fluid flows) is an practical alternative. In the Euler approach the finite elements mesh remains fixed, while material flows through it. There is no need for remeshing, therefore. In this paper selected results of coupled Eulerian-Lagrangian analysis are presented. A bent beam as the benchmark test and backward extrusion as an example of metal forming process are considered. Some models parts (tools) are described by updated Lagrangian formulation, other parts (material) are described by Eulerian approach. Obtained results of CEL analyses were compared to ones of the pure Lagrangian approach.

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