Effective permeability of shielding mortars containing ferromagnetic particles by using FEM

This paper proposes a strategy for the evaluation of effective permeability of mortars containing ferromagnetic particles for magnetic shielding. The representation of the composite mixture is done by using just 3-D inclusions in a finite element method. A statistical analysis is then performed on thousands of meshes representing the same sample geometry, with different inclusions distribution. Homogenization technique based on energy balance is then adopted in order to compute the effective permeability of the mortars. Thus, we are able to establish a relationship between the components of the mixture and an ideal equivalent homogeneous magnetic material with an assigned magnetic effective permeability. The results has been verified by using experimental data.