Title :
Magnetic flux leakage modeling for mechanical damage in transmission pipelines
Author :
Ivanov, P.A. ; Zhang, Z. ; Yeoh, C.H. ; Udpa, L. ; Sun, Y. ; Udpa, S.S. ; Lord, W.
Author_Institution :
Dept. of Electr. & Comput. Eng., Iowa State Univ., Ames, IA, USA
fDate :
9/1/1998 12:00:00 AM
Abstract :
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
Keywords :
finite element analysis; magnetic leakage; nondestructive testing; stress analysis; finite element model; gas transmission pipeline; magnetic flux leakage; mechanical damage; permeability; stress distribution; Corrosion; Inspection; Iron; Magnetic analysis; Magnetic flux leakage; Magnetic materials; Permeability; Pipelines; Predictive models; Residual stresses;
Journal_Title :
Magnetics, IEEE Transactions on
