A Computer Model of Eddy-Current Probe-Crack Interaction

  • L. David Sabbagh
  • Harold A. Sabbagh
Part of the Review of Progress in Quantitative Nondestructive Evaluation book series


A general three-dimensional eddy-current probe model, developed by Sabbagh Associates and reported in [1], [2] and [3], has been adapted for the calculation of probe-flaw interactions. The theoretical model, [4] and [5], uses integral equations with dyadic Green’s function kernels, and is applicable to both probe and flaw calculations at arbitrary skin depths and frequencies. Discrete approximations of the integral equations are solved using a highly efficient algorithm based on recent developments in numerical techniques and their application to the solution of large problems in electromagnetic field-theory.


Probe Position Magnetic Dipole Moment Magnetic Source Probe Impedance Flaw Calculation 
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  1. 1.
    J. R. Bowler, L. D. Sabbagh, H. A. Sabbagh, “A Theoretical and Computational Model of Eddy-Current Probes Incorporating Volume Integral and Conjugate Methods” IEEE Trans. Magnetics, Volume 25, Number 3, May 1989, pp 2650–2664.Google Scholar
  2. 2.
    L. D. Sabbagh, J. R. Bowler and H. A. Sabbagh, “Eddy-Current Probe Model for Composites, Metals and Semiconductors,” Review of Progress in Quantitative Nondestructive Evaluation, Vol. 8A, D. O. Thompson and D. E. Chimenti, Eds. ( Plenum, New York, 1989 ) pp. 299–304.CrossRefGoogle Scholar
  3. 3.
    H. A. Sabbagh, L. D. Sabbagh and J. R. Bowler, “Validation of a Model of Ferrite-Core Probes Over Composite Workpieces,” 1988 IEEE AP-S International Symposium, Volume III, pp. 1369–1372.Google Scholar
  4. 4.
    Harold A. Sabbagh, John R. Bowler, L. David Sabbagh, “ A Volume Integral Code For Eddy-Current Nondestructive Evaluation,” Applied Computational Electromagnetics Society Journal, Spring 1989, Vol. 4, No. 1, pp 3–22.Google Scholar
  5. 5.
    J. R. Bowler, L. D. Sabbagh, H. A. Sabbagh, “Eddy-Current Probe Impedance Due to a Volumetric Flaw,” submitted Journal Applied Physics.Google Scholar

Copyright information

© Springer Science+Business Media New York 1990

Authors and Affiliations

  • L. David Sabbagh
    • 1
  • Harold A. Sabbagh
    • 1
  1. 1.Sabbagh Associates, Inc.BloomingtonUSA

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