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

Published online by Cambridge University Press:  21 October 2010

C. Guérin ,
G. Meunier  and
F. Foucher
C. Guérin*
Affiliation:
Cedrat S.A. 15, Chemin de Malacher, 38246 Meylan Cedex, France
G. Meunier
Affiliation:
Laboratoire de Génie Électrique de Grenoble, G2Elab, UMR 5269 INPG-UJF-CNRS, ENSIEG –, BP 46, 38402 Saint-Martin-d'Hères Cedex, France
F. Foucher
Affiliation:
Cedrat S.A. 15, Chemin de Malacher, 38246 Meylan Cedex, France
*
[email protected] [email protected] [email protected]
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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.

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 52 , Issue 2: Focus on Numelec , November 2010 , 23302
Copyright
© EDP Sciences, 2010

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