Numerical evaluation of ECT impedance signal due to minute cracks

This paper describes an experimental and analytical study on minute crack inspection with eddy current testing (ECT). Measurement and simulation using a 3D FEM program are applied for the evaluation of the detecting signal with a minute crack in a test piece. Parameters such as mesh division, ICCG convergence criteria, etc. are evaluated to achieve high accuracy in numerical calculation. The simulation results agreed with experimental ones.