Journal of Theoretical
and Applied Mechanics

48, 3, pp. 659-676, Warsaw 2010

Analysis of magnetic field effect on ferromagnetic spheres embedded in elastomer pattern

Anna Boczkowska, Leszek Czechowski, Mieczysław Jaroniek, Tadeusz Niezgoda
The results of modelling of the magnetorheological elastomers (MREs) microstructure using Finite Elements Method (FEM) are shown. MREs are solids analogous to magnetorheological fluids consisting of carbonyl-iron particles and a soft elastomer matrix. Fabrication of MREs is performed in an external constant magnetic field. Due to the presence of this field, the ferromagnetic particles tend to arrange themselves into elongated chains according to the magnetic field lines. FEM analysis of the MREs microstructure takes into account two cases: magnetic power and elastic vectors as well as their interactions between the components of the composite. The paper describes spatial ordering of the particles based on their interactions with the magnetic field. Two phenomena were taken into account: the force of a magnetic field and the local magnetic dipoles. Both fields have been modelled for a circular conductor with electrical current.
Keywords: magnetorheological elastomers; Finite Element Method; photoelastic method