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Sensor location analysis in nonlinear acoustics used for damage detection in composite chiral sandwich panels

Sensor location analysis in nonlinear acoustics used for damage detection in composite chiral sandwich panels

Klepka, Andrzej, Staszewski, Wieslaw J., di Maio, Dario, Scarpa, Fabrizio, Tee, Kong-Fah and Uhl, Tadeusz (2012) Sensor location analysis in nonlinear acoustics used for damage detection in composite chiral sandwich panels. Advances in Science and Technology, 83. pp. 223-231. ISSN 1662-0356 (doi:10.4028/www.scientific.net/AST.83.223)

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Abstract

This paper demonstrates damage detection in a smart sandwich panel with integrated piezoceramic transducers. The panel is built from a chiral honeycomb and two composite skins. A low-profile, surface-bonded piezoceramic transducer is used for high-frequency ultrasonic excitation. Low-frequency excitation is performed using an electromagnetic shaker. Ultrasonic sensing is performed using laser vibrometry. Nonlinear acoustics is applied for damage detection. The study is focused on sensor location analysis with respect to vibro-acoustic wave modulations.
The paper demonstrates that when structure is damaged, the high-frequency “weak” ultrasonic wave is modulated by the low-frequency “strong” vibration wave. As a result frequency sidebands can be observed around the main acoustic harmonic in the spectrum of the ultrasonic signal. However, intensity of modulation strongly depends on sensor location.

Item Type: Article
Additional Information: [1] Published in Advances in Science and Technology, Volume 83, 2013. Main Theme - Embodying Intelligence in Structures and Integrated Systems. Chapter 4: Structural Health Monitoring and Control. Edited by Pietro Vincenzini, Fabio Casciati and Piervincenzo Rizzo. [2] This paper was first presented at the 4th International Conference on Smart Materials, Structures and Systems (CIMTEC 2012), held 10-14 June 2012 in Montecatini Terme, Italy. [3] Advances in Science and Technology is a irregular series presenting the Proceedings of CIMTEC, International Cermics Congress and Forum on New Materials. The series is published on behalf of TECHNA GROUP, Faenza, Italy.
Uncontrolled Keywords: chiral structures, impact damage detection, nonlinear acoustics, piezoceramic transducers, sensor location analysis
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Pre-2014 Departments: School of Engineering
School of Engineering > Department of Civil Engineering
Related URLs:
Last Modified: 14 Oct 2016 09:23
URI: http://gala.gre.ac.uk/id/eprint/9630

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