Modeling of Diffusion Layer Thickness Variation of Laminate in Case of a Current Supply

This paper discuses the modeling of the diffusion layer thickness variation impact on eddy currents signals. The numerical modeling of laminate with the diffusion layer is realized using finite elements code developed under Matlab environment. The solving of the 2D electromagnetic equation, in (r,z) plane, is performed by considering magnetic permeability variation of diffusion layer. A comparison between the simulation results and experimental signals shows a good agreement.