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Multiphysic Modeling of Second Generation Magnetoelectric Materials : application to Connected Objects

Abstract : Magnetoelectric materials (ME) are functional composite materials composed of piezoelectric and magnetostrictive phases that have the particularity of transforming magnetic energy into electrical energy through the mediation of mechanical energy. The ME effect can be characterized by a magnetoelectric coefficient (V/Oe). This particular property generates growing interests in the scientific research and more specifically in the application of new energy transducers, magnetic sensors or variable inductances. It is in this context that the L2E began since 2012 the development of multiphysics finite element codes to study the ME materials. This thesis is the development of a 3D model combining the existence models of piezoelectric and magnetostrictive for the investigation of ME behavior from three aspects: Modeling of laminate composite, taking into account the nonlinearity of magnetostrictive through a multiscale model and the effect of eddy currents in dynamic regime; Study of different ME composite structures and the influence of geometries parameters on the performance of this material; Application of the homogenization principle to analyze the magnetoelectric behavior of ME composites composed of granular nanoparticles type 0-3 or fiber composite type 1-3.
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Tuan Anh Do. Multiphysic Modeling of Second Generation Magnetoelectric Materials : application to Connected Objects. Electromagnetism. Sorbonne Université, 2019. English. ⟨NNT : 2019SORUS486⟩. ⟨tel-02926280⟩

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