Sensor location analysis for nonlinear-acoustics-based damage detection in composite structures

Andrzej Klepka; Wieslaw J. Staszewski; Francesco Aymerich; Tadeusz Uhl

doi:10.1117/12.915282

20 April 2012 Sensor location analysis for nonlinear-acoustics-based damage detection in composite structures

Andrzej Klepka, Wieslaw J. Staszewski, Francesco Aymerich, Tadeusz Uhl

Proceedings Volume 8348, Health Monitoring of Structural and Biological Systems 2012; 83482G (2012) https://doi.org/10.1117/12.915282
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2012, San Diego, California, United States

Abstract

This paper investigates the piezo-based nonlinear vibro-acoustic modulation technique for impact damage detection in composite structures. The method is based on combined low-frequency modal excitation and high-frequency ultrasonic excitation that lead to vibro-acoustic modulations in damaged specimens. The work presented focuses on sensor location analysis. Low-profile, surface bonded piezoceramic transducers are used for ultrasonic and modal excitation.. Modulated responses are acquired using laser vibrometry. Various areas of monitored composite structures are investigated to establish positions exhibiting the largest intensities of vibro-acoustic modulations resulting from impact damage. The study shows that sensor location in composite structures is important for efficient damage detection.

Citation Download Citation

Andrzej Klepka, Wieslaw J. Staszewski, Francesco Aymerich, and Tadeusz Uhl "Sensor location analysis for nonlinear-acoustics-based damage detection in composite structures", Proc. SPIE 8348, Health Monitoring of Structural and Biological Systems 2012, 83482G (20 April 2012); https://doi.org/10.1117/12.915282

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