Modeling of Magneto-Elastic Behavior Under Perturbations of Spontaneous Magnetic Field

Abstract

Internal magnetic fields launched by the neighbor grains can influence the magneto-mechanical coupling effects of the material. However, these perturbations are often ignored and have not been taken into account in the previous works. Herein, a multiscale model is proposed for describing the magneto-elastic behavior and a localization operation is employed to deal with the perturbation of spontaneous magnetic field in magnetism. The model proposed is discussed, and two simulation results are compared each other on polycrystalline iron. The simulation results demonstrate that there is no great disturbance to the magnetization curve when the spontaneous magnetic field is taken into account. However, the perturbation has an obvious counteraction effect on magnetostrictive curve. The results are consistent with our previous hypothesis and have certain reference value and significance for experimental measurement. This kind of micro-macro strategy could then participate in the understanding of the effect of stress on the magnetic behavior, especially in the case of multiaxial loadings.