INFLUENCE OF THE TRANSVERSE STRESS COMPONENT OF FERROMAGNETIC MATERIALS ON MBN SIGNALS UNDER BIDIRECTIONAL STRESS CONDITIONS

This paper studies the effect of the transverse stress component of magnetically isotropic ferromagnetic materials on the magnetic Barkhausen noise (MBN) testing signals under planar bidirectional stress states. Based on the logistic distribution function, a model that can be used to describe the effect of the planar bidirectional stress level on MBN characteristic signals is proposed; the formulated model works within the elastic limit of the magnetically isotropic ferromagnetic materials. Then, the characteristics of the proposed regression model are analyzed by computer simulation. Finally, to validate the proposed regression model, the bidirectional stress experimental data extracted from the published paper is used. The results show that there is a high linear correlation between the actual data and the predicted data of the formulated model. Therefore, it can be proved that the proposed planar bidirectional stress regression model based on the logistic distribution function is feasible, applicable, and valuable.