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A partly explicit finite element formulation for the forging process

Abstract : This paper presents different finite element formulations for the large deformation modelling of a viscoplastic material. A partly-explicit acceleration-pressure formulation is investigated. As the velocity is supposed to be known, we do not have to deal with the possible non-linear feature of the material. Consequently, there is no need to use any Newton-Raphson iteration. The mixed finite element discretization is based on a simple triangular mini-element P1 + /P1. Analysis concerning the bubble properties and its influences on the equation system have been done in order to simplify the formulation. This new dynamic formulation has been successfully implemented in a viscoplastic version of the code Forge2®. Comparisons with implicit static and implicit dynamic algorithms have been performed. Numerical examples are provided to compare the different formulations. A good agreement is noticed on final results.
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Submitted on : Monday, December 8, 2014 - 4:52:25 PM
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Mihaela Teodorescu, Katia Mocellin, Jean-Loup Chenot, Richard Ducloux. A partly explicit finite element formulation for the forging process. International Journal of Computational Engineering Science, World Scientific Publishing, 2001, 02 (03), pp.425-452. ⟨10.1142/S1465876301000386⟩. ⟨hal-01092446⟩



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