Finite-difference time-domain method for multilayer carbon-fiber-reinforced polymer panel using tensorial conductivity matrix

This paper presents a finite-difference time-domain (FDTD) method for multilayer carbon-fiber-reinforced polymer (CFRP) panel using tensorial conductivity matrix. By proper interpolation, all the electromagnetic field components involved in the FDTD update equations are all located in the Yee's cell in a staggered manner. Based on the measured tensorial conductivity matrix, the anisotropic characteristic of multilayer CFRP panel with different fiber orientations in different layers is modeled. A unidirectional CFRP panel is simulated to show the current density distributions for different tensorial conductivity matrice. In addition, a lightning-like source striking at an infinite large multilayer multidirectional CFRP panel truncated by convolutional perfectly matched layer (CPML) is also simulated. The current densities and the electric fields at the center point for the top four layers testify the conductive loss along the in-depth direction.