Magnetic particle chains embedded in elastic polymer matrix under pure transverse shear and energy conversion

Gildas Diguet (1) , Gael Sebald (1) , Masami Nakano (1, 2) , Mickaël Lallart (3) , Jean-Yves Cavaillé (1)

1 ELyTMaX
2 NICHE - New industry Creation Hatchery Center, Tohoku University
3 LGEF - Laboratoire de Génie Electrique et Ferroélectricité

A model of structured Magneto-rheological Elastomer made of a soft matrix filled by magnetic particles was studied for energy harvesting, in pure shear condition. The particles were supposed to be aligned in a chain along which the magnetic field is applied and considering a shear strain applied in a plane perpendicularly to the chain. As the strain is applied and assuming the deformation is homogeneous and the particles remain aligned, both of the axis of their alignment and inter-distance between particles change, affecting their magnetic state. The aim of this work is to evaluate how far the magnetic induction variation induced by mechanical solicitation can be converted into electric signal. We firstly analyzed the magnetic susceptibility of a particle in the chain, and then derived an analytical expression for the composite permeability as a function of shear strain. FEM simulations taking into account the particle magnetic saturation was also performed to estimate the optimal conditions (magnetic field values, shear amplitude, etc.) maximizing the energy conversion potentials.

Mots clés: Magneto-Rheological Elastomer; Magnetization; Pseudo-Villari; Energy conversion

Domaines: Matériaux; Electromagnétisme

Gildas Diguet, Gael Sebald, Masami Nakano, Mickaël Lallart, Jean-Yves Cavaillé. Magnetic particle chains embedded in elastic polymer matrix under pure transverse shear and energy conversion. Journal of Magnetism and Magnetic Materials, 2019, 481, pp.39-49. ⟨10.1016/j.jmmm.2019.02.078⟩. ⟨hal-02059863⟩