J. Phys. IV France 08 (1998) Pr2-583-Pr2-586
Analysis of the magnetomechanical behavior of non-oriented ferromagnetic sheetsM. Delage, C. Ramiarinjaona and J.F. Rialland
LESiR, École Normale Supérieure de Cachan, 61 avenue du Président Wilson, 94235 Cachan cedex, France
The purpose of this article is to study the effects of a non-colinear magnetic field and mechanical stress upon the behavior of non-oriented iron-silicon sheets. The evolutions being analyzed concern the magnetic losses and the magnetization work under sinusoidal flux density and at an exciting frequency of 50 Hz. Results show a consistent increase in losses along with a flattening of the magnetic characteristic with respect to the stress regardless of the direction being considered. Moreover, a strengthening of the initial anisotropy present within the sample is noticed ; an axis of difficult magnetization, located near 70°, also appears. The use of the Bertotti model as a means of predicting total losses demonstrates a good agreement with the experimental results. The method that enables studying the evolution of hysteresis and excess losses, based on this model, does however require some refinement.
© EDP Sciences 1998