3-D nonlinear eddy-current analysis of alternating magnetic flux leakage testing - analysis of one crack and two cracks

Author

Gotoh, Yuji ; Takahashi, Norio

Author_Institution

Dept. of Electron. Eng., Chugoku Polytech. Coll., Okayama, Japan

Volume

38

Issue

2

fYear

2002

fDate

3/1/2002 12:00:00 AM

Firstpage

1209

Lastpage

1212

Abstract

The alternating magnetic flux leakage testing has been applied in the nondestructive inspection process for detecting cracks on the surface of steel. This paper describes numerical analysis using three-dimensional (3-D) edge-based hexahedral finite element method for this testing. The necessity of nonlinear analysis is clarified in comparison with the linear analysis (jω method). The characteristic of leakage flux is confirmed by verification experiment. The possibility of distinguishing two cracks is examined by calculating the detailed distribution of leakage flux around cracks

Keywords

crack detection; eddy current testing; finite element analysis; magnetic leakage; alternating magnetic flux leakage testing; crack detection; eddy current; linear analysis; nondestructive inspection; nonlinear analysis; numerical analysis; steel surface; three-dimensional finite element method; Finite element methods; Inspection; Leak detection; Magnetic analysis; Magnetic flux; Magnetic flux leakage; Nondestructive testing; Numerical analysis; Steel; Surface cracks;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.996309

Filename

996309