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Issue title: Special Volume: Proceedings of the eleventh International Symposium on Applied Electromagnetics and Mechanics ISEM-Versailles ISEM 03
Article type: Research Article
Authors: Theodoulidis, Theodorosa
Affiliations: [a] Department of Engineering and Management of Energy Resources, Aristotle University of Thessaloniki, Kastorias and Fleming, 50100 Kozani, Greece. Tel.: +30 2310991307; Fax: +30 2310991304; E-mail: [email protected]
Abstract: A semi-analytical method for modelling electromagnetic fields is applied to eddy current nondestructive evaluation (NDE) to simulate the end effect in tube testing with bobbin coils. The boundary value problem is formulated in terms of the magnetic vector potential and is solved using orthogonal eigenfunctions, the eigenvalues of which are computed as roots of a transcendent complex equation. Closed-form expressions are derived for the impedance change of the coil and the induced eddy currents. The results are in excellent agreement with those obtained by a 2D-finite element package.
Keywords: eddy current testing, nondestructive evaluation, end effect, edge effect, coil impedance
DOI: 10.3233/JAE-2004-564
Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 19, no. 1-4, pp. 207-212, 2004
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