Numerical analysis of eddy current NDT for a tube with cracks using 3D indirect BIEM

Author

Lee, Hyang-Beom ; Kim, Dong-Hun

Author_Institution

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

Volume

35

Issue

5

fYear

1999

fDate

9/1/1999 12:00:00 AM

Firstpage

3724

Lastpage

3726

Abstract

In this paper, the 3-dimensional indirect boundary integral equation method (BIEM) is applied to the numerical analysis of eddy current non-destructive testing (NDT) for a tube with cracks. The indirect BIEM is developed in terms of the equivalent surface current density and equivalent surface charge density on the interface. The existence and type of the crack in the pipe can be determined from the distortion of the magnetic charge density distribution. The impedance signal is calculated from the equivalent surface charge density without calculating the self inductance. The axisymmetric and the 90-degree circular outer crack problems are calculated as an example. The result shows the usage of the indirect BIEM in the area of eddy current NDT

Keywords

boundary integral equations; crack detection; current density; eddy current testing; 3D indirect BIEM; axisymmetric cracks; circular outer crack; eddy current NDT; equivalent surface charge density; equivalent surface current density; impedance signal; indirect boundary integral equation method; magnetic charge density distribution; Current density; Eddy currents; Green´s function methods; Integral equations; Magnetic analysis; Magnetic materials; Nondestructive testing; Numerical analysis; Surface cracks; Surface impedance;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.800644

Filename

800644