Thermomechanics of the cooling stage in casting processes: Three-dimensional finite element analysis and experimental validation

Abstract : A thermomechanical three-dimensional (3-D) finite element analysis of solidification is presented. The heat transfer model is based on a multidomain analysis accounting for noncoincident meshes for the cast part and the different mold components. In each subdomain, a preconditioned conjugate gradient solver is used. The mechanical analysis assumes the mold is rigid. A thermoelastic-viscoplastic rheological model is used to compute the constrained shrinkage of the part, resulting in an effective local air gap width computation. At each time increment, a weak coupling of the heat transfer and mechanical analyses is performed. Comparisons of experimental measurements and model predictions are given in the case of a hollow cylindrical aluminum alloy part, showing a good quantitative agreement. An application to an industrial aluminum casting is presented, illustrating the practical interest of thermomechanical computations in solidification analysis.
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https://hal-mines-paristech.archives-ouvertes.fr/hal-01420915
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Soumis le : mercredi 21 décembre 2016 - 11:24:40
Dernière modification le : lundi 12 novembre 2018 - 10:58:43

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Michel Bellet, Florent Decultieux, Mamar Ménaï, François Bay, Christophe Levaillant, et al.. Thermomechanics of the cooling stage in casting processes: Three-dimensional finite element analysis and experimental validation. Metallurgical and Materials Transactions B, Springer Verlag, 1996, 27 (1), pp.81 - 99. ⟨10.1007/BF02915080⟩. ⟨hal-01420915⟩

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