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Proceedings Paper

Fundamental ultrasonic wave propagation studies in a model thermal protection system (porous tiles bonded to aluminum bulkhead)
Author(s): Tribikram Kundu; Richard Reibel; Kumar V. Jata
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Paper Abstract

A model thermal protection system (TPS) was designed by bonding ceramic porous tiles to 2.2 and 3.5 mm thick 2124-T351 aluminum alloy plates. One of the goals of the present work was to investigate the potential of detecting simulated defects using guided waves. Simulated defects consisted of cracks, voids and delaminations at the tile-substrate interface. Cracks and voids were introduced into the porous tiles during the fabrication of the TPS. Delamination was created by cutting the gluing tape between the tile and the aluminum substrate. Guided wave propagation studies were conducted using the pitch-catch approach, while changing the angle of strike and the frequency of the transducer excitation to generate the appropriate guided wave mode. The receiver was placed at a distance so that only the guided waves were received during the immersion experiment. The delamination defect could be conclusively detected, however the presence of the imperfect bond between the tiles and the substrate interfered with the detection of the simulated cracks and voids in the porous tiles.

Paper Details

Date Published: 15 March 2006
PDF: 10 pages
Proc. SPIE 6177, Health Monitoring and Smart Nondestructive Evaluation of Structural and Biological Systems V, 617705 (15 March 2006); doi: 10.1117/12.658640
Show Author Affiliations
Tribikram Kundu, The Univ. of Arizona (United States)
Richard Reibel, Univ. of Dayton (United States)
Kumar V. Jata, Air Force Research Lab. (United States)

Published in SPIE Proceedings Vol. 6177:
Health Monitoring and Smart Nondestructive Evaluation of Structural and Biological Systems V
Tribikram Kundu, Editor(s)

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