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Proceedings Paper

Damage detection and locating using tone burst and continuous excitation modulation method
Author(s): Zheng Li; Zhi Wang; Li Xiao; Wenzhong Qu
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Paper Abstract

Among structural health monitoring techniques, nonlinear ultrasonic spectroscopy methods are found to be effective diagnostic approach to detecting nonlinear damage such as fatigue crack, due to their sensitivity to incipient structural changes. In this paper, a nonlinear ultrasonic modulation method was developed to detect and locate a fatigue crack on an aluminum plate. The method is different with nonlinear wave modulation method which recognizes the modulation of low-frequency vibration and high-frequency ultrasonic wave; it recognizes the modulation of tone burst and high-frequency ultrasonic wave. In the experiment, a Hanning window modulated sinusoidal tone burst and a continuous sinusoidal excitation were simultaneously imposed on the PZT array which was bonded on the surface of an aluminum plate. The modulations of tone burst and continuous sinusoidal excitation was observed in different actuator-sensor paths, indicating the presence and location of fatigue crack. The results of experiments show that the proposed method is capable of detecting and locating the fatigue crack successfully.

Paper Details

Date Published: 9 March 2014
PDF: 9 pages
Proc. SPIE 9064, Health Monitoring of Structural and Biological Systems 2014, 90642O (9 March 2014); doi: 10.1117/12.2044998
Show Author Affiliations
Zheng Li, Wuhan Univ. (China)
Zhi Wang, Wuhan Univ. (China)
Li Xiao, Wuhan Univ. (China)
Wenzhong Qu, Wuhan Univ. (China)

Published in SPIE Proceedings Vol. 9064:
Health Monitoring of Structural and Biological Systems 2014
Tribikram Kundu, Editor(s)

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