Affiliations: [a] Department of Electrical Engineering, "POLITEHNICA"
University of Bucharest, Splaiul Independentei 313, Bucharest 060042, Romania
Correspondence:
[*]
Corresponding author: Gabriel Preda, "POLITEHNICA" University
of Bucharest, Splaiul Independentei 313, Bucharest 060042, Romania. Tel.: +40
744 523 359; Fax: +40 21 402 91 44; E-mail: preda@elth.pub.ro
Abstract: Pulse eddy currents are proposed for detection of cracks in
structural conductive, non-magnetic parts. The rectangular pulse accounts for a
multi-frequency analysis with the lower harmonics pentrating deeper in the
material. An integral-FEM method for simulation of transient eddy-currents and
model of defects as zero-thickness, two-dimensional flaws are used. Difference
signals peak value depends on crack depth and the peak value moment is delayed
for smaller outer defects. The method is effective for defects buried deep
under the surface.
