  Electromagnetic crimping is a high-velocity joining method to join highly
conductive workpieces where a pulsed magnetic field is applied without any
working medium or mechanical contact to deform the workpiece. This work
explores tube-to-tube joining of Copper outer tube and Stainless steel threaded
inner tube using electromagnetic crimping. A non-coupled simulation model is
developed for the finite element analysis. ANSYS Maxwell package is used to
obtain the magnetic field intensity, which is later converted to pressure using
an analytical equation, and this pressure is applied to the two-tube working
domain in ANSYS Explicit Dynamics. Numerical simulations are done for different
combinations of discharge energies and pitches of the thread to analyse
deformation, stress and strain. The converged finite element results are
validated using experimental data. The amount of deformation is found to be
proportional to discharge energy and the pitch of the thread used. An empirical
relation is developed for the deformation as a function of discharge energy and
pitch. The relation is able to predict the deformation for other discharge
energies, which is later verified with ANSYS simulations.
