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Numerical Evaluation of the Depth of Branched-Off Cracks Using Eddy Current Testing Signals

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3 Author(s)
Weiying Cheng ; NDE Center, Japan Power Eng. & Inspection Corp., Yokohama ; Kanemoto, S. ; Komura, I.

Numerical simulation shows that eddy current testing (ECT) signal of a branched-off crack is much larger than that of a same deep, single crack. To avoid the overestimation of the depth of a branched-off crack, a depth sizing index, which is designed to have maximum sensitivity to crack depth, is constructed based on an optimization approach, and the depths of branched-off cracks are estimated using this index. This depth sizing approach is numerically and experimentally validated.

Published in:

Magnetics, IEEE Transactions on  (Volume:44 ,  Issue: 6 )

Date of Publication:

June 2008

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