Lamb-wave-based feature extraction of damage in a stiffened composite panel under varying temperature

Anthony J. Vizzini II; Aditi Chattopadhyay

doi:10.1117/12.915413

20 April 2012 Lamb-wave-based feature extraction of damage in a stiffened composite panel under varying temperature

Anthony J. Vizzini II, Aditi Chattopadhyay

Proceedings Volume 8348, Health Monitoring of Structural and Biological Systems 2012; 83481P (2012) https://doi.org/10.1117/12.915413
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2012, San Diego, California, United States

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.

Citation Download Citation

Anthony J. Vizzini II and Aditi Chattopadhyay "Lamb-wave-based feature extraction of damage in a stiffened composite panel under varying temperature", Proc. SPIE 8348, Health Monitoring of Structural and Biological Systems 2012, 83481P (20 April 2012); https://doi.org/10.1117/12.915413

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