Development of a method to measure compressive stress in ferromagnetic materials using weak alternating current excitation

Weak alternating current (AC) has advantages such as reducing interference, energy conservation and higher levels of safety. Firstly, a compressive stress-magnetomechanical coupling model was established based on the Jiles-Atherton (J-A) model. Subsequently, the established model was subjected to simulation analysis using MATLAB and COMSOL software. Finally, an experimental platform was built to conduct experimental research, thereby validating the theory and simulation results. The results indicate that as the compressive stress increases, the magnetic signal first increases and then decreases. Additionally, under a constant compressive stress, the magnetic signal increases with the increase in the magnetic field. This study provides a theoretical basis and experimental reference for weak AC compressive stress detection methods.