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Proceedings Paper

Lamb-wave-based feature extraction of damage in a stiffened composite panel under varying temperature
Author(s): Anthony J. Vizzini II; Aditi Chattopadhyay
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Paper Abstract

This paper presents a methodology for determining the existence of delaminations in complex composite structures. The changes in damage features due to changing temperature are investigated. A Lamb wave based active damage detection technique is used. The Matching Pursuit Decomposition (MPD), a time frequency based signal processing technique, is used for feature extraction. The signals from two different test structures, a healthy specimen and a specimen with seeded delamination, are compared to incorporate the effect of manufacturing variability. Tests are conducted under varying ambient temperature. The results obtained validate the effectiveness of this approach in detecting delamination.

Paper Details

Date Published: 20 April 2012
PDF: 9 pages
Proc. SPIE 8348, Health Monitoring of Structural and Biological Systems 2012, 83481P (20 April 2012); doi: 10.1117/12.915413
Show Author Affiliations
Anthony J. Vizzini II, Arizona State Univ. (United States)
Aditi Chattopadhyay, Arizona State Univ. (United States)

Published in SPIE Proceedings Vol. 8348:
Health Monitoring of Structural and Biological Systems 2012
Tribikram Kundu, Editor(s)

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