Modélisation analytique et étude numérique de l'écoulement d'une tôle le long d'un jonc de retenue

Abstract : Numerical simulations take a great place in deep drawing processes. But some parts, like drawbeads, are complex and leads to an unacceptable increase in CPU time. The purpose of this work is to develop an analytical model for sheet bending/stretching along drawbead. The geometrical evolution of an elementary length of the sheet is described by the Love-Kirchhoff assumption. The thinning of the sheet is taken into account in the calculation. The assumption of either isotropic or kinematic hardening, and Coulomb's friction is assumed. This model, confirmed by numerical simulations, allowed us to perform a complete parameter analysis, and constitute a tool to choose drawbeads
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Ludovic Courvoisier. Modélisation analytique et étude numérique de l'écoulement d'une tôle le long d'un jonc de retenue. Mécanique des matériaux [physics.class-ph]. Université Paul Verlaine - Metz, 2001. Français. ⟨NNT : 2001METZ001S⟩. ⟨tel-01775482⟩

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