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Study on problems in detecting plural cracks by alternating flux leakage testing using 3D nonlinear eddy current analysis

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2 Author(s)
Gotoh, Y. ; Dept. of Electron. Eng., Chugoku Polytech. Coll., Okayama, Japan ; Takahashi, N.

The alternating magnetic flux leakage testing is used for the detection of cracks in a steel plate. A new technique of how to detect plural cracks, which are located at a very short distance from each other, using the parallel (x-) component of the leakage flux density is proposed. The behavior of leakage flux is examined using a three-dimensional edge-based hexahedral finite-element method. The effects of dimensions of search coils and cracks on the detection accuracy are illustrated.

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Magnetics, IEEE Transactions on  (Volume:39 ,  Issue: 3 )