Numerical and experimental analysis of eddy current testing for a tube with cracks

Author

Hashizume, H. ; Yamada, Y. ; Miya, K. ; Toda, S. ; Morimoto, K. ; Araki, Y. ; Satake, K. ; Shimizu, N.

Author_Institution

Dept. of Nucl. Eng., Tohoku Univ., Sendia, Japan

Volume

28

Issue

2

fYear

1992

fDate

3/1/1992 12:00:00 AM

Firstpage

1469

Lastpage

1472

Abstract

A novel method for calculating the impedance signal in eddy current testing (ECT) for a tube with surface cracks is developed using the two-dimensional current vector potential method. Three-dimensional current flow around a surface crack is approximated by introducing quasi-conductivity in the crack region. A final matrix relating the current vector potentials is obtained by decreasing the width of the crack to zero, and then the elements in the crack region are not necessary any longer. Numerical results show good agreement with the experimental ones, which indicates the validity of the proposed method and the possibility of designing a more efficient probe of ECT using the code

Keywords

crack detection; eddy current testing; probes; crack region; eddy current testing; impedance signal; probe; quasi-conductivity; surface crack; two-dimensional current vector potential method; Coils; Conductors; Eddy current testing; Eddy currents; Electrical capacitance tomography; Equations; Numerical analysis; Probes; Surface cracks; Surface impedance;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.123973

Filename

123973