Numerical Models for Composite Materials In E-NDT

From the electrical point of view, CFRP composites are characterized by an anisotropic uniaxial conductivity posing difficult problems for their electromagnetic description and numerical modeling. In this paper, the previous computational model, based on a magneto-quasi-stationary integral numerical formulation, is suitably extended to take into account the electro-quasi-static contribution as well as the magneto-quasi-static part, mainly dueto the presence of low values of the conductivity perpendicular to the fibres. The formulation is well suited for a broad spectrum of frequencies being possible to take into account low frequency applications as well as cases in which wave propagation is no more negligible. A simple example is analyzed showing the high potential of the proposed approach.