https://doi.org/10.1051/epjap/2010061
Coupling t-ϕ formulation with surface impedance boundary condition for eddy current crack detection
1
Cedrat S.A. 15, Chemin de Malacher, 38246 Meylan Cedex, France
2
Laboratoire de Génie Électrique de Grenoble, G2Elab, UMR 5269 INPG-UJF-CNRS, ENSIEG –, BP 46, 38402 Saint-Martin-d'Hères Cedex, France
Corresponding authors: This email address is being protected from spambots. You need JavaScript enabled to view it. This email address is being protected from spambots. You need JavaScript enabled to view it. This email address is being protected from spambots. You need JavaScript enabled to view it.
Received:
14
December
2009
Revised:
18
March
2010
Accepted:
22
March
2010
Published online:
21
October
2010
Abstract
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 t-ϕ 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.
© EDP Sciences, 2010
