Evaluation of a surface equivalent model in the case of conductive reinforced composite sheets by the use of a macro-fiber modeling approach

This work is focused on the modeling of low conductive and inhomogeneous composite materials. In a first part, based on the assumption that the conductivity of a woven carbon fiber reinforced epoxy material is negligible in the laminating direction (between the stratums), its reinforcement stratum is modeled by the use of a surface equivalent impedance model. This model is then evaluated, in the case of such conductive composite materials, using a macro-fiber model. These two modeling approaches are compared between each other by analyzing the response (current densities) of the reinforcement stratum to an electromagnetic incident plane wave excitation. In the second part of this paper, we use the macro-fiber and the surface impedance models to study the electrical behavior (current follow and anisotropy) of the reinforcement stratum in the case of a plate representing a part of a vehicle chassis partially constituted of this conductive carbon reinforced composite material.