Dynamic behavior of thin plates under impulsive magnetic field

Author

Tani, J. ; Minagawa, M. ; Ohtomo, K. ; Saigo, M.

Author_Institution

Inst. of Fluid Sci., Tohoku Univ., Sendai, Japan

Volume

26

Issue

2

fYear

1990

fDate

3/1/1990 12:00:00 AM

Firstpage

544

Lastpage

547

Abstract

A numerical analysis is presented for the dynamic behavior of thin conductive plates with a crack under both impulsive and constant magnetic fields which are perpendicular and parallel to the plate surface, respectively. On the assumption of two-dimensional currents and on the basis of small-bending-plate theory, and finite-element method is used for numerical analyses of the eddy current and the motion of the plate, respectively. The crack is found to open up in the transverse direction of the vibrating plate when it is perpendicular to the direction of the constant magnetic field. The Lorentz force is generated by interaction between the magnetic fields and the eddy current induced in the plate. If the Lorentz force is of sufficient magnitude, the crack may grow, which leads to fracture

Keywords

bending; cracks; eddy currents; electromagnetic field theory; finite element analysis; magnetoelastic effects; numerical methods; vibrating bodies; Lorentz force; constant magnetic fields; crack; dynamic behavior; eddy current; finite-element method; fracture; impulsive magnetic field; numerical analysis; small-bending-plate theory; thin conductive plates; two-dimensional currents; vibrating plate; Coils; Eddy currents; Equations; Finite element methods; Fluid dynamics; Least squares approximation; Lorentz covariance; Magnetic analysis; Magnetic fields; Magnetic liquids;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.106374

Filename

106374