Abstract
Eddy current methods are a widely used technique in the nondestructive inspection of aircraft structures and parts. The method consists of inducing eddy-currents in the material being tested using a probe coil. The magnetic field produced by these eddy-currents opposes that of the probe coils (Lenz’s law) and the net effect is a reduced magnetic flux linking the coil. The presence of defects in the material under test disturbs the distribution of eddy-currents which in turn disturbs the net field. This change in the field is detected as a change in the impedance of the coil. The changes in coil impedance measured as the probe scans the specimen contitutes an eddy current defect signal.
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References
A. J. Schwab, “Field Theory Concepts,” Springer-Verlag, Berlin, Germany, 1938.
D. Jiles, “Introduction to Magnetism and Magnetic Materials,” Chapman & Hall, 1991.
R. Palanisamy “Finite Element Eddy Current NDT Model,” Ph.D. Thesis, Colorado State University, Fort Collins, Colorado, 1980.
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© 1997 Springer Science+Business Media New York
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Sharma, S., Elshafiey, I., Udpa, L., Udpa, S. (1997). Finite Element Modeling of Eddy Current Probes for Edge Effect Reduction. In: Thompson, D.O., Chimenti, D.E. (eds) Review of Progress in Quantitative Nondestructive Evaluation. Review of Progress in Quantitative Nondestructive Evaluation, vol 16. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-5947-4_26
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DOI: https://doi.org/10.1007/978-1-4615-5947-4_26
Publisher Name: Springer, Boston, MA
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