Coupled Electromagnetic Structural Simulation of Magnetic Pulse Welding

The present study deals with the Coupled Magnetic-S\ud tructural analysis of Magnetic pulse welding proces\ud s applied \ud on a tubular workpiece. The study investigates the \ud various criteria required for a successful weld bet\ud ween the mating \ud members through a Finite element model developed us\ud ing COMSOL Multiphysics. The transient electromagne\ud tic \ud field phenomenon is coupled sequentially with mecha\ud nical phenomenon. The coupling between the magnetic\ud field \ud and the electrical circuit is formulated in the ele\ud ctromagnetic part of the model, whereas in the stru\ud ctural part, the \ud impact velocities, the effective plastic strain ind\ud uced in the workpiece and the direction and magnitu\ud de of the shear \ud stress at the impact zone are found from the numeri\ud cal simulations. A viscoplastic material model with\ud rate \ud dependent material properties is considered in the \ud structural part. The effect of varying process para\ud meters: input \ud voltage and air gap between the two mating members \ud on weld quality are computed through numerical simu\ud lations. \ud Based on the results of the numerical simulations a\ud n optimal weldability window is suggested