Title :
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
fDate :
3/1/2002 12:00:00 AM
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;
Journal_Title :
Magnetics, IEEE Transactions on
