Calembour: an implicit method based on an enriched kinematical thin-plate model for sheet-metal forming simulation

In this paper, the main features of an implicit sheet-metal forming simulation code, named Calembour, are presented. Special emphasis is put on the way of expressing the contact conditions and of taking into account the geometrical non-linearity of which they comprise. An enriched kinematical thin-plate model, involving seven independent fields defined on the medium surface of the undeformed plate, is suggested. The constitutive laws used to model the material behavior and the friction phenomenon are given. A standard bilinear finite-element method is used to approximate the continuous total Lagrangian formulation of the global mechanical problem. Finally, some numerical results enlighting the effectiveness of the present approach are given.