Magnetoelasticity for large stresses

Abstract

A model of magnetoelasticity based on the differential susceptibility, stress effective magnetic field, and stress demagnetization in conjunction with appropriate rules of hysteresis is presented and compared to experimental data for high-strength steels for several magnetoelastic processes. The authors observe a decrease in stress effectiveness and define a saturation anisotropy factor which decreases from unity in the Rayleigh region to less than one half for the values of stress and field considered. The model also predicts the stressed saturate hysteresis loop and equilibrium near the anhysteretic curve and enables understanding of the Villari reversal of magnetoelastic sensitivity.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>