A comparative study of experimental and simulated ultrasonic pulse-echo signals from multilayered structuresThe effect on the system acoustic response of variations in the adhesive thickness, coupling thickness, and paint thickness is considered. Both simulations and experimental measurements are used to characterize and classify A-scans from test regions, and to study the effects of various parameters such as paint thickness and epoxy thickness on the variations in the reflected signals. A 1D model of sound propagation in multilayered structures is used to verify the validity of the measured signals, and is also used to computationally generate signals for a class of test locations with gradually varying parameters. This approach exploits the ability of numerical simulations to provide a good understanding of the ultrasonic pulses reflected at disbonds.
Document ID
19930035666
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Abedin, M. N. (NASA Langley Research Center Hampton, VA, United States)
Prabhu, D. R. (Analytical Services and Materials, Inc.; NASA, Langley Research Center Hampton, VA, United States)
Winfree, W. P. (NASA Langley Research Center Hampton, VA, United States)
Johnston, P. H. (NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1992
Publication Information
Publication: In: Review of progress in quantitative nondestructive evaluation. Vol. 11B; Proceedings of the 18th Annual Review, Brunswick, ME, July 28-Aug. 2, 1991 (A93-19582 06-38)