Numerical model for eddy-current testing of ferromagnetic steel parts

Author

Ioan, Daniel ; Rebican, Mihai

Author_Institution

Electr. Eng. Dept., "Politehnica" Univ. of Bucharest, Romania

Volume

38

Issue

2

fYear

2002

fDate

3/1/2002 12:00:00 AM

Firstpage

629

Lastpage

632

Abstract

The paper presents an efficient numerical method to simulate eddy-current testing (ECT) of ferromagnetic steel parts. The method is based on the nonlinear integral equation for quasi-stationary electromagnetic field with gauge condition based on tree/cotree decomposition. The eddy-current density in the conductive domain and the magnetization in the ferromagnetic domain are discretized with edge elements and vectorial volume elements, respectively. A simple, but very effective magnetization model of steel in a low field is also presented. The algorithm convergence for solving the forward ECT nonlinear problem with time-periodic boundary conditions is proved

Keywords

convergence of numerical methods; eddy current testing; ferromagnetic materials; integral equations; magnetisation; steel; trees (mathematics); algorithm convergence; cotree decomposition; eddy current testing; ferromagnetic steel part; gauge condition; magnetization; nonlinear integral equation; numerical model; quasi-stationary electromagnetic field; time-periodic boundary conditions; tree decomposition; Boundary conditions; Convergence; Electrical capacitance tomography; Electromagnetic fields; Integral equations; Magnetization; Numerical models; Numerical simulation; Steel; Testing;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.996164

Filename

996164