Experimental Verification of Eddy-Current Flaw Theory
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Begun in 1973, the Review of Progress in Quantitative Nondestructive Evaluation (QNDE) is the premier international NDE meeting designed to provide an interface between research and early engineering through the presentation of current ideas and results focused on facilitating a rapid transfer to engineering development.
This site provides free, public access to papers presented at the annual QNDE conference between 1983 and 1999, and abstracts for papers presented at the conference since 2001.
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Abstract
Carefully machined flaw samples in plates and tubes were examined with eddy-current coils of accurately known dimensions. Both near- and far-side flaws were measured using absolute and differential coil modes. The experimental data were compared with computer calculations based on the flaw theory of Burrows and the analytical solutions of Dodd and Deeds. The experimental and theoretical data are in good agreement whenever the flaw size is small compared to the other significant dimensions, but large enough to give a reasonable signal-to-noise ratio for the measuring instrument. The experimental and analytical readings are also used to check our flaw inversion theory.