Research on the physical mechanism of the magnetization reversal phenomenon of ferromagnetic specimens

In order to study the physical mechanism of the magnetization reversal phenomenon of ferromagnetic specimens, the Q235 steel plate was simulated by ANSYS simulation software. When the maximum stress is greater than 252MPa, the magnetization reversal phenomenon occurs. Starting from the principle of minimum energy, combined with the external magnetic field energy and stress energy, a magnetization reversal model based on the principle of minimum energy is established, which explains the phenomenon of magnetization inversion from a microscopic perspective; at the same time, a stress-effective field model and a stress-permeability The model reflects the change of the macroscopic magnetization through the change of the microscopic effective field and magnetic permeability. The research shows that the three mathematical models can reflect the magnetization reversal phenomenon of stress, which lays a theoretical foundation for the in-depth research on the quantitative detection of metal magnetic memory.