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Using the Skin Effect to Estimate Cracks Depths in Mettalic Structures

Ramos, H. ; Postolache, O. ; Alegria, F. ; Ribeiro, A. L.

Using the Skin Effect to Estimate Cracks Depths in Mettalic Structures, Proc IEEE Instrumentation and Measurement Technology Conf., Singapore, Singapore, Vol. CD, pp. 1361 - 1366, May, 2009.

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Abstract
This paper is concerned with the characterization of depth profiles defects in metallic structures. Experimental work using giant magnetoresistors (GMR) scanning automatically a metallic plate with eddy currents induced by an excitation coil has been carried out and is described. The results are analyzed in comparison with the simulation results obtained with a commercial finite element model for some test cases.