Analysis of Electromagnetic Forming Using Sequential Electromagnetic-Mechanical Coupled Simulations

Abstract A sequential coupled field analysis of electromagnetic free bulging was performed by using FEM. A 2D axi-symmetric electromagnetic model based on the magnetic vector potential is proposed for the calculation of magnetic field and Lorentz’s forces. The Newmark integration method is used to calculate the transient dynamic plastic deformation of sheet during free bulging. In the finite element model, the effect of sheet deformation on the electromagnetic field analysis is taken into consideration. In order to confirm the sequential electromagnetic-mechanical coupling analysis, an experiment with an electromagnetic forming apparatus was conducted. The results showed that the final bulge height of the sheet predicted from the proposed method is in good agreement with experimentally measured height. Key Words : Electromagnetic Forming, Sequential Coupling Simulation, Electromagnetic-Structural Coupling, ANSYS /Multiphysics, High Speed Forming , Morphing , Lorentz’s Force