Coupling t- formulation with surface impedance boundary condition for eddy current crack detection

C. Guérin , G. Meunier , F. Foucher

We present in this paper a 3D electromagnetic formulation to describe two conductors in electric contact with each other, submitted to the field of a coil in which an AC current is flowing. One of the two conductors is described by the - formulation, the other conductor is described by the surface impedance boundary condition. The proposed coupled formulation has been validated with a numerical example with a simple geometry. This coupled formulation has then been applied to a numerical example on which a crack has to be detected. It is composed of a non magnetic tube embedded in a thick steel tube sheet, submitted to the field of a coil.

Mots clés: Physical Sciences

C. Guérin, G. Meunier, F. Foucher. Coupling t- formulation with surface impedance boundary condition for eddy current crack detection. European Physical Journal: Applied Physics, 2010, 52 (2), ⟨10.1051/epjap/2010061⟩. ⟨hal-00634376⟩