An inverse analysis for crack identification in eddy current NDT of tubes

Author

Lee, Hong-bae ; Jung, Hyun-Kyo ; Hahn, Song-Yop ; Chung, Jin-Kyo

Author_Institution

Dept. of Electr. Eng., Seoul Nat. Univ., South Korea

Volume

30

Issue

5

fYear

1994

fDate

9/1/1994 12:00:00 AM

Firstpage

3403

Lastpage

3406

Abstract

This paper presents an inverse analysis for crack identification in eddy current nondestructive testing of tubes. The finite element modeling of axisymmetric eddy current phenomena is based on the formulation of the energy functional with the magnetic vector potential. An optimization algorithm in the inverse process employs the objective function expressed in terms of the impedance change of a differential probe which consists of two coils. The proposed method is applied to a simple axisymmetric model with a crack made arbitrarily

Keywords

crack detection; eddy current testing; finite element analysis; functional analysis; inverse problems; optimisation; axisymmetric model; coils; crack identification; differential probe; eddy current nondestructive testing; energy functional; finite element modeling; impedance; inverse analysis; magnetic vector potential; objective function; optimization algorithm; tubes; Coils; Conductivity; Eddy current testing; Eddy currents; Equations; Finite element methods; Impedance; Optimization methods; Probes; Shape;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.312669

Filename

312669