AN EULERIAN ELASTOPLASTIC FEM SOLUTION TO DRAWING PROCESSES

An elastoplastic finite element method solution to drawing processes i s presented. A steady state nature of these processes allows the probl em to be formulated in the spatial reference frame. The solution is di vided into two variational problems. The first part involves minimizat ion of the deformation power and gives a kinematically admissible velo city field. The second part is an integration of the stress transport equations. A numerical algorithm based on the non-linear optimization with constraints is employed to integrate the objective stress rate in the final configuration without linearization. The predictive capabil ities of the method are demonstrated for drawing of a copper bar.