Optimization of Panel Forming Processes in Creep Mode Using CAE-Technologies

Abstract

Forming in the creep mode of articles from sheets and panels is considered with the help of reconfigurable rods punch, which allows to change the shape of the workpiece. The experimental results allow one to identify the operation of scattering with the damage parameter. In this case, forming processes allow to control the level of material damage, to coordinate with technological limitations, due to the optimal choice of the deformational path in time. The problem of deformation in creep with contact conditions is solved by the finite element method. As the optimization criterion, the dissipation work accumulated in the process of deformation is adopted. Taking into account the time-discrete equations of the step-by-step integration procedure and the minimized functional, a discrete optimal control problem is formulated. In this formulation, the Bellman function is constructed and the problem is solved by the method of dynamic programming. An algorithm for calculating the rational motion of rods during forming is presented. This algorithm is implemented in the system MSC.Marc, MSC.Patran.