Affiliations: [a] Department of Aerospace Engineering, Pusan National University, Gumjung-ku, Busan, Korea | [b] Industrial Liaison Innovation Cluster, Pusan National University, Gumjung-ku, Busan, Korea | [c] ERC/ITAF, Pusan National University, Gumjung-ku, Busan, Korea
Correspondence:
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Corresponding author: Jeong Kim, Department of Aerospace Engineering, Pusan National University, Gumjung-ku, Busan 609-735, Korea. Tel.: +82 51 510 2477; Fax: +82 51 513 3760; E-mail:greatkj@pusan.ac.kr
Abstract: A sequential coupled field analysis of an electromagnetic free bulging
process was performed using the FEM. A 2D axisymmetric electromagnetic model
based on the magnetic vector potential is proposed for the calculation of
the magnetic field and Lorentz forces, and then, the Newmark integration
method is used to calculate the transient dynamic plastic deformation of a
sheet during the free bulging process. In the finite element model, the
effect of sheet deformation on the electromagnetic field analysis is taken
into account. In order to confirm the sequential electromagnetic-structural
coupling analysis, an experiment with an electromagnetic forming apparatus
was carried out. This showed that the final bulge height of the sheet
predicted using the method proposed in this paper was in good agreement with
the experimental one.
