Numerical approximation of unstressed or prestressed magnetostrictive materials

Michel J. M. Bernadou; Song He

doi:10.1117/12.350065

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4 June 1999 Numerical approximation of unstressed or prestressed magnetostrictive materials

Michel J. M. Bernadou, Song He

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Proceedings Volume 3667, Smart Structures and Materials 1999: Mathematics and Control in Smart Structures; (1999) https://doi.org/10.1117/12.350065
Event: 1999 Symposium on Smart Structures and Materials, 1999, Newport Beach, CA, United States

Abstract

A ferromagnetic material located into a unidirectional exterior magnetic field vector H_ext takes a new internal magnetization which induces closure domains separated by walls. When the magnetic field vector H_ext varies from a saturated value H_max vector e_x to -H_max vector e_x, we can observe hysterisis phenomenon and motion of the walls. The numerical approximation of these phenomena is difficult since the associated modelization is nonlinear and the magnetization field vector m has to satisfy vector m equals constant. The associate modelization, an efficient minimization algorithm (augmented Lagrangian method) and corresponding results have been presented in the last SPIE meeting. This contribution discusses the coupling between magnetic effects and elastic effects which can be met in magnetostrictive materials.

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Michel J. M. Bernadou and Song He "Numerical approximation of unstressed or prestressed magnetostrictive materials", Proc. SPIE 3667, Smart Structures and Materials 1999: Mathematics and Control in Smart Structures, (4 June 1999); https://doi.org/10.1117/12.350065

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