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Magnetic flux leakage modeling for mechanical damage in transmission pipelines

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7 Author(s)
Ivanov, P.A. ; Dept. of Electr. & Comput. Eng., Iowa State Univ., Ames, IA, USA ; Zhang, V. ; Yeoh, C.H. ; Udpa, L.
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This paper presents a two stage FE model for prediction of magnetic flux leakage, resulting from mechanical damage. In the first stage the stress distribution associated with mechanical damage is obtained from a structural model. In the second stage the stress distribution is incorporated into a magnetic FE model, by mapping stress levels to permeability. MFL signals are calculated and compared with experimental gouge MFL signatures

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Magnetics, IEEE Transactions on  (Volume:34 ,  Issue: 5 )