Construction and Analysis of Two-Dimensional Axisymmetric Model of Electromagnetic Tube Bulging With Field Shaper

Abstract

Due to the fact that geometrical structure of tube electromagnetic bulging process with field shaper does not conform to the axisymmetric property, three-dimensional (3D) model is usually used to analyze the process which is complicated and time consuming. Therefore, on the basis of understanding the working principle of the field shaper, a two-dimensional (2D) model with current constraint is proposed in this paper to analyze the electromagnetic bulging process of a tube fitted with a field shaper. COMSOL finite element analysis software is used to develop three models for performance analysis and comparison, these are: conventional 3D model and the proposed 2D model with and without current constraint. Simulation results show that the induced eddy current density, magnetic flux density and electromagnetic body density of the two-dimensional model with current constraint are in good agreement with the results of the threedimensional model. This provides an alternative and effective way to analyze the performance of the tube electromagnetic bulging with field shaper using a simple but yet reliable 2D model. INDEX TERMS Electromagnetic forming, Field shaper, Lightweight alloy, Finite element analysis.

Parametric Simulation Analysis of the Electromagnetic Force Distribution and Formability of Tube Electromagnetic Bulging Based on Auxiliary Coil

“…Thus, finite element analysis is used to precisely simulate the electromagnetic forming physical process [22,23]. In this paper, COMSOL software is used to establish two-dimensional axisymmetric model of the electromagnetic tube expansion process [24,25]. Fig.…”

Numerical Analysis of Tube Expansion by Electromagnetic Forming Using Magnetic Field Shaper

“…In order to simplify the model, the air gap of the magnetic field shaper is firstly assumed to be filled with the same material, as shown in Figure 5(b). Because the distance between the two equal currents I2 and I4 that flow in opposite direction is small [30], the magnetic field generated is only confined near the gap, and will have little impact on the electromagnetic bulging of the entire pipe. Therefore, the model can be simplified further as shown in Figure 5(c) of which all parameters including the magnetic field and induced currents will have axial symmetry.…”

“…This, the threedimensional model can be replaced by a simplified twodimensional model. In [30], the equivalent process of the magnetic field shaper is presented in details.…”

“…It is worth noting that the material properties of aluminum alloy changes with the strain rate [27]. Usually, the forming speed reaches 180 to 300m/s [30]. Therefore, it is necessary to consider the effect of high speed and high strain rate on the material properties of the tube.…”

Analytical Modeling and Optimization Design of an Electromagnetic Pulse Welding Device With a Field Shaper for Metal Plates

“…When aluminum and its alloys are used in vehicles, they need to be connected with different metal plates. Electromagnetic pulse welding is a high-speed solid-state welding technology, which is of great significance in the welding of dissimilar metals [3][4][5][6][7][8].…”