Computation of eddy current probe response due to a long crack based on a vector potential integral formulation

Article type: Research Article

Authors: Yoshida, Y.^{a; *} | Bowler, J.R.^b

Affiliations: [a] Nuclear Engineering Research Laboratory, The University of Tokyo, 2-22 Shirakata-Shirane Tokai Naka Ibaraki, 319-11, Japan | [b] Department of Physics, The University of Surrey, Guildford, Surrey GU2 5XH, UK

Correspondence: [*] Corresponding author. Tel.: +81 29 287 8431; Fax: +81 29 287 8488; E-mail: [email protected].

Abstract: A volume integral formulation utilizing the vector potential dyadic Green’s function is applied to the computation of eddy current probe response due to a long crack. In addition to the ideal crack model, a thin crack model is proposed which takes into account the effect of crack opening on the measurement signal. To deal with the infinitely long crack, the spatial Fourier transform is applied to the boundary integral equation based on the vector potential integral formulation and then the method of moments is used to discretize the resultant equation. The proposed method is validated through the comparison of the computed results with measurements.

DOI: 10.3233/JAE-1999-130

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 10, no. 1, pp. 77-89, 1999