Exploring Electromagnetic Tube Expansion Based on Field Concentrator: An Analytical Model and Numerical Study

Abstract This paper delves into the realm of Electromagnetic forming (EMF), a high-speed forming process leveraging pulsed magnetic fields generated via capacitor bank discharge through a coil. Traditionally, numerical analyses of EMF processes focused on electromagnetic tube expansion and the influence of forming conditions. However, in high-energy electromagnetic setups, the magnetic field concentrator adds complexity, transitioning analyses into a 3D modeling domain. This paper consolidates an analysis and numerical investigation inspired by the Muhlbauer approach to elucidate the impact of the field concentrator on electromagnetically expanded tubes. Employing an enhanced finite element model for magnetic tube expansion simulations. This research sheds light on how this additional component influences the EMF process, offering valuable insights into modeling electromagnetic bulging when incorporating the field concentrator.