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Numerical approximation of unstressed or prestressed magnetostrictive materials
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Paper Abstract

A ferromagnetic material located into a unidirectional exterior magnetic field vector Hext takes a new internal magnetization which induces closure domains separated by walls. When the magnetic field vector Hext varies from a saturated value Hmax vector ex to -Hmax vector ex, 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.

Paper Details

Date Published: 4 June 1999
PDF: 9 pages
Proc. SPIE 3667, Smart Structures and Materials 1999: Mathematics and Control in Smart Structures, (4 June 1999); doi: 10.1117/12.350065
Show Author Affiliations
Michel J. M. Bernadou, Pole Univ. Leonard de Vinci (Italy) and INRIA (France)
Song He, Pole Univ. Leonard de Vinci (France)

Published in SPIE Proceedings Vol. 3667:
Smart Structures and Materials 1999: Mathematics and Control in Smart Structures
Vasundara V. Varadan, Editor(s)

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