Finite element formulation for the simulation of hot sheet metal forming processes (Q1094910)

Simulation of sheet metal forming processes involves large deformation analysis. In this paper, the finite element method has been utilized for a consistent analysis of coupled thermomechanical large deformation of metals. A time-dependent elastic-viscoplastic model has been used to represent the flow type behavior of metals at elevated temperatures. The proposed model incorporates initial anisotropy and temperature dependence of metals. A proper choice of objective stress rate, suitable for anisotropic materials has been made. Integration of the rate constitutive equations is carried by a return mapping algorithm. A special Lagrangian- Eulerian three dimensional finite element mesh description has been used to avoid the typical problems encountered in a Lagrangian description. A technique for solving the coupled equations is suggested.