Affiliations: [a] State Key Laboratory of Material Processing and Die
and Mould Technology, Huazhong University of Science and Technology, Wuhan, Hubei, China
Correspondence:
[*]
Corresponding author: Jian-Jun Li, State Key Laboratory of
Material Processing and Die and Mould Technology, Huazhong University of
Science and Technology, Wuhan 430074, Hubei, China. Tel.: +86 027 8755 7042;
Fax: +86 027 8755 7174; E-mail: ljj@263.net.cn
Abstract: In this paper, a 3D numerical simulation method was put forward by
coupling magnetic-structural fields, and its reliability was verified through
comparing with the experimental data offered by Suzuki. According to the
characteristics of electromagnetic expansion of metal tube, this simulation
method was used to analyze the uniformity of tube expansion when the length of
tube was less than that of the coil. Meanwhile, a curve of homogeneity of
electromagnetic tube expansion with different aspect ratios (ratio of length to
diameter) of tube was given based on the criterion of uniformity on deformation
at the condition of specific parameters presented in this paper. By analyzing
the mechanical characteristics of tube expansion, a length range of tube was
found where the tube deformed uniformly. The results derived from this paper
provided a good guidance for optimization design of electromagnetic ring
expansion experiments which will be conducted on and this could ultimately
promote the application of electromagnetic forming.
Keywords: Electromagnetic tube expansion, 3D numerical simulation, evaluation criterion, homogeneity of deformation
