This paper presents progress on the characterization of discontinuities in multilayer fastener sites using bolt hole eddy current (BHEC) techniques with model-based inversion. Improvement to the inversion process have been made, however, some model discrepancy remains resulting in greater inversion error for smaller corner discontinuities. Sensitivity to probe liftoff and the calibration process was also observed during experimental testing, indicating the need to estimate and compensate for varying probe state and certain adjacent material conditions.
IOS Press, Inc.
6751 Tepper Drive
Clifton, VA 20124
Tel.: +1 703 830 6300
Fax: +1 703 830 2300 email@example.com
(Corporate matters and books only) IOS Press c/o Accucoms US, Inc.
For North America Sales and Customer Service
West Point Commons
Lansdale PA 19446
Tel.: +1 866 855 8967
Fax: +1 215 660 5042 firstname.lastname@example.org