A thin sheet finite element crack model in eddy current NDE

Author

Badics, Zsolt ; Komatsu, Hidenobu ; Matsumoto, Yoshihiro ; Aoki, Kazuhiko ; Nakayasu, Fumio ; Miya, Kenzo

Author_Institution

Nucl. Fuels Ind. Ltd., Osaka, Japan

Volume

30

Issue

5

fYear

1994

fDate

9/1/1994 12:00:00 AM

Firstpage

3080

Lastpage

3083

Abstract

A thin sheet finite element crack model has been developed to analyze the electromagnetic interaction between probe coils and crack-type defects in eddy current NDE (Nondestructive Evaluation). The crack type irregularities are treated here as nonconducting thin sheets with negligible thickness to avoid the discretization along their width. On the crack surfaces magnetic vector potential with zero normal component and jumping electric scalar potential ensure the proper behavior of the electromagnetic field. The model can be incorporated into the finite element formulation without disrupting the primary finite element scheme. A benchmark problem has been solved, and numerical results of the crack model have been compared to experimental data

Keywords

crack detection; eddy current testing; finite element analysis; Nondestructive Evaluation; benchmark problem; crack-type defects; discretization; eddy current NDE; electric scalar potential; electromagnetic field; finite element model; magnetic vector potential; nonconducting thin sheets; probe coils; Coils; Eddy currents; Electric potential; Electromagnetic analysis; Electromagnetic modeling; Finite element methods; Magnetic analysis; Probes; Surface cracks; Surface treatment;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.312588

Filename

312588