Finite Elements for a Thermomechanical Analysis of Solidification Processes

Michel Bellet (1) , Charles Aliaga (2) , Olivier Jaouen (3)

1 CEMEF - Centre de Mise en Forme des Matériaux
2 Sciences Computers Consultants
3 Transvalor

This paper presents a thermo-mechanical approach to the numerical simulation of solidification processes. A three-dimensional finite element analysis is presented. After a brief recall about the heat transfer computation, the mechanical model is detailed. The behaviour of the cast alloy is modelled either by a thermo-elastic-viscoplastic model, or by a thermo-viscoplastic model, depending on the local solid fraction. The mould is deformable and assumed thermoelastic. A mixed velocity-pressure formulation has been developed, using tetrahedral P1+/P1 elements. The model has been implemented in Thercast software for three-dimensional casting simulation.

Mots clés: Finite element; thermomechanics; solidification

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

Michel Bellet, Charles Aliaga, Olivier Jaouen. Finite Elements for a Thermomechanical Analysis of Solidification Processes. MCWASP IX, 9th Int. Conf. on Modeling of Casting, Welding and Advanced Solidification Processes, Aug 2000, Aachen, Germany. pp.Pages 10-17. ⟨hal-00576403⟩