A Fast Analysis Technique for Electromagnetic Interaction of High-Frequency AC Current-Carrying Wires With Arbitrary-Shape Cracks in Ferrous Metals

The paper proposes a fast and accurate modeling technique for calculating the electromagnetic fields around a planar surface crack with arbitrary depth profile in a ferromagnetic metal, induced by a high-frequency ac current-carrying wire of arbitrary shape. The proposed technique first reduces the governing 3-D problem into two new equivalent 2-D electrostatic Dirichlet problems. Then, the method-of-moments is used to solve the new resultant problems. The main feature of the proposed technique is its remarkable high computation speed as compared to the conventional methods. The efficiency of the proposed technique is demonstrated by comparing the experimental and theoretical results.

[1]  Kenzo Miya,et al.  Reconstruction of crack shapes from the MFLT signals by using a rapid forward solver and an optimization approach , 2002 .

[2]  Seyed Hossein Hesamedin Sadeghi,et al.  Neural network approach for determination of fatigue crack depth profile in a metal, using alternating current field measurement data , 2008 .

[3]  S.H.H. Sadeghi,et al.  Field distributions around arbitrary shape surface cracks in metals, induced by high-frequency alternating-current-carrying wires of arbitrary shape , 2006, IEEE Transactions on Magnetics.

[4]  Seyed Hossein Hesamedin Sadeghi,et al.  Electromagnetic field distributions around conducting slabs, produced by eddy-current probes with arbitrary shape current-carrying excitation loops , 2001 .

[5]  Eddy current analysis of a conductor with a groove by surface integral equation with one unknown , 2005, IEEE Transactions on Magnetics.

[6]  Dariush Mirshekar-Syahkal,et al.  AC fields around short cracks in metals induced by rectangular coils , 1999 .

[7]  T. Theodoulidis,et al.  Eddy-current interaction of a long coil with a slot in a conductive plate , 2005, IEEE Transactions on Magnetics.

[8]  T. Theodoulidis,et al.  Eddy currents induced in a finite length layered rod by a coaxial coil , 2005, IEEE Transactions on Magnetics.

[9]  Dariush Mirshekar-Syahkal,et al.  Surface potential distributions due to eddy currents around long cracks in metals, induced by U-shaped current-carrying wires , 1991 .

[10]  Christophe Dolabdjian,et al.  Eddy-Current Nondestructive Testing Using an Improved GMR Magnetometer and a Single Wire as Inducer: A FEM Performance Analysis , 2010, IEEE Transactions on Magnetics.

[11]  J. Pávó,et al.  Reconstruction of crack shape by optimization using eddy current field measurement , 1994 .

[12]  D. H. Michael,et al.  Thin‐skin electromagnetic fields around surface‐breaking cracks in metals , 1988 .

[13]  S. Sadeghi,et al.  Computing electromagnetic field distribution due to an arbitrary shape exciter near multilayer slab conductors , 2005, IEEE Transactions on Magnetics.

[14]  Seyed Hossein Hesamedin Sadeghi,et al.  Thin-skin analysis technique for interaction of arbitrary-shape inducer field with long cracks in ferromagnetic metals , 2004 .

[15]  Dariush Mirshekar-Syahkal,et al.  Scattering of an induced surface electromagnetic field by fatigue cracks in ferromagnetic metals , 1992 .

[16]  T. Theodoulidis,et al.  Developments in Calculating the Transient Eddy-Current Response From a Conductive Plate , 2008, IEEE Transactions on Magnetics.

[17]  T. Theodoulidis,et al.  Interaction of an Eddy-Current Coil With a Right-Angled Conductive Wedge , 2010, IEEE Transactions on Magnetics.

[18]  N. Harfield,et al.  Thin-skin eddy-current interaction with semielliptical and epicyclic cracks , 2000 .

[19]  Zsolt Badics,et al.  An effective 3-D finite element scheme for computing electromagnetic field distortions due to defects in eddy-current nondestructive evaluation , 1997 .

[20]  R. Palanisamy,et al.  Numerical simulation of pulsed eddy-current nondestructive testing phenomena , 1990 .

[21]  Theodoros Theodoulidis,et al.  Eddy currents induced in a conducting rod of finite length by a coaxial encircling coil , 2005 .