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A multiscale model for the elastoviscoplastic behavior of Directionally Solidified alloys: Application to FE structural computations |
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| Authors: | G Martin N Ochoa K Saï E Hervé-Luanco G Cailletaud |
| Institution: | 1. MINES ParisTech, Centre des Matériaux, CNRS UMR7633, BP 87, 91003 Evry Cedex, France;2. UGPMM, Ecole Nationale d’Ingénieurs de Sfax, BP 1173 Sfax, Tunisia;3. Université de Versailles St-Quentin-en-Yvelines, 45 rue des Etats-Unis, 78035 Versailles Cedex, France;4. Snecma Villaroche, Rond-point René Ravaud, Réau 77550, Moissy-Cramayel, France |
| Abstract: | A mean field mechanical model describing the inelastic behavior and strong anisotropy of Directionally Solidified (DS) materials is developed. Its material parameters are calibrated by comparison with the Finite Element (FE) computation of a Representative Volume Element (RVE). In the case of a large grain alloy where microstructure size cannot be neglected with respect to geometrical variations, this approach is a good candidate to evaluate the local scatter coming from the material heterogeneity. |
| Keywords: | Directionally Solidified alloy Homogenization Mean field model Finite Element analysis |
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