Reducing Computational Cost and Allowing Automatic Remeshing in FEM Models of Metal Forming Coupled With Polycrystal Plasticity

Roland E. Logé (1) , Marianne Béringhier (1) , Yvan Chastel (1) , Laurent Delannay (2)

1 CEMEF - Centre de Mise en Forme des Matériaux
2 MEMA

The paper proposes an original use of the Lagrangian particles concept for finite element computation of microstructure evolution in metal forming. The method amounts to distributing incomplete representations of the microstructure among the integration points of the mesh while a complete microstructure is associated with each Lagrangian particle. This decreases the computation time and enables the transport of microstructural variables when remeshing. While the method is presented for any kind of discretized microstructure, it is applied here to the prediction of mechanical anisotropy induced by crystallographic texture. In this specific case, the numerical predictions are validated against experiment by considering compression of a textured aluminium alloy (AA7175). The model accuracy is assessed with respect to mechanical anisotropy but texture evolution is also considered.

Mots clés: finite element analysis; crystal microstructure; plasticity; forming processes; aluminium alloys; texture

Domaines: Sciences de l'ingénieur [physics]; Matériaux

Roland E. Logé, Marianne Béringhier, Yvan Chastel, Laurent Delannay. Reducing Computational Cost and Allowing Automatic Remeshing in FEM Models of Metal Forming Coupled With Polycrystal Plasticity. Materials Processing and Design, Modeling, Simulation and Applications, NUMIFORM '07: 9th International Conference on Numerical Methods in Industrial Forming Processes, Jun 2007, Porto, Portugal. pp.Pages 387-392, ⟨10.1063/1.2740842⟩. ⟨hal-00576599⟩