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Computer Modeling of Eddy Current Probability of Crack Detection

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Abstract

The objective of this work was to demonstrate the application of eddy current modeling to the determination of the probability of crack detection. The method of calculation, derived from previously reported work on the boundary element method (BEM) [1], used concepts discussed in other works on probability of detection (POD) calculations [2,3]. In contrast to the earlier POD investigations, which were concerned with crack-like flaws in flat plates with a simple circular coil as the probe, the present modeling deals with a realistic part geometry and a split-D probe configuration with ferrite cores and shield. Figures 1 and 2 show the part and probe geometries, respectively; the specifics of the inspection problem are described in the first section of this paper.

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References

  1. R. E. Beissner, “A Three-Dimensional Boundary Model for Eddy Current NDE,” in Review of Progress in Quantitative NDE edited by D. O. Thompson and D. E. Chimenti ( Plenum, New York, 1989 ), Vol. 8, p. 229.

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  2. R. E. Beissner, K. A. Bartels, and J. L. Fisher, “Prediction of the Probability of Eddy Current Flaw Detection,” in Review of Progress in Quantitative NDE, edited by D. O. Thompson and D. E. Chimenti ( Plenum, New York, 1988 ), Vol. 7, p. 1753.

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  3. N. Nakagawa and R. E. Beissner, “Probability of Tight-Crack Detection Via Eddy Current Inspection,” in these proceedings.

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  4. B. A. Auld, in Eddy-Current Characterization of Materials and Struc- tures, ASTM STP 722, edited by G. Birnbaum and G. Free, American Society for Testing and Materials, Philadelphia (1981), p. 332.

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  5. R. E. Beissner and J. A. G. Temple, “Calculation of Eddy Current Fields for Coils of Arbitrary Shape,” in these proceedings.

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  6. R. E. Beissner, to be published.

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  7. J. L. Fisher, G. L. Burkhardt, S. N. Rowland, Jr., J. H. Fitzgerald, R. J. Dexter, and J. P. Buckingham,“ Inspection Development for T-37 Wing Spar Cap Lug,” Final Report SA-ALC/MMEP/88–02, prepared for San Antonio Air Logistics Center/MMEP, Kelly Air Force Base, Texas (1989).

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© 1990 Springer Science+Business Media New York

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Beissner, R.E., Graves, J.S. (1990). Computer Modeling of Eddy Current Probability of Crack Detection. In: Thompson, D.O., Chimenti, D.E. (eds) Review of Progress in Quantitative Nondestructive Evaluation. Review of Progress in Quantitative Nondestructive Evaluation. Springer, Boston, MA. https://doi.org/10.1007/978-1-4684-5772-8_112

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  • DOI: https://doi.org/10.1007/978-1-4684-5772-8_112

  • Publisher Name: Springer, Boston, MA

  • Print ISBN: 978-1-4684-5774-2

  • Online ISBN: 978-1-4684-5772-8

  • eBook Packages: Springer Book Archive

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