Three-Dimensional Non-linear Analysis of Magnetic Field and Stress in a Ferromagnetic Material

Abstract

Ferritic stainless steel is likely to prove extremely useful for a first wall of a fusion power reactor because of low rate of irradiation swelling. However it is magnetizable when it is used in magnetic field. As a consequence of magnetization it will receive magnetic body force and disturb magnetic field configuration suitably designed for plasma confinement. Then we are interested in a magnitude of the induced magnetic stress and the range of disturbed magnetic field.
Here we analysed induced magnetic induction and magnetic stress for a beam-plate considering nonlinearty of B-H relation. In addition, we studied the magnetomechanical behavior with both the experimental and the computational analysis. We found that the magnetic torque due to magnetization is small and the extent of the disturbed magnetic field due to a ferromagnetic body is limited.