Identification of the Location and Level of Damage in Multiple-Bolted-Joint Structures by PZT Actuator-Sensors
Publication: Journal of Structural Engineering
Volume 132, Issue 2
Abstract
A piezoceramic (PZT) patch can be used simultaneously as an actuator and as a sensor for structural damage detection by utilizing its electromechanical coupling property. In this technique, a PZT actuator-sensor patch is bonded on a structure. Through the measurement of its electrical impedance, which is related to mechanical impedance of the structure being bonded, the change in structure properties due to damage can be detected. This paper presents the use of PZT actuator-sensors in conjunction with numerical model-based methodology in order to identify the location and level of the damage in multiple-bolted-joint structures. Laboratory experiments were performed on a two-joint and a four-joint aluminum beam, where the damage was simulated by loosening the bolts. The impedance was measured at high frequencies so that the wavelength of the excited motion is small and sensitive enough to detect local damage. Numerical models of structures were formulated by using a spectral element method, which has a high capability for high-frequency modeling. By utilizing the models, the location and level of the damage could be quantitatively identified.
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Acknowledgment
The first writer wishes to express his thanks to the Japanese Ministry of Education, Culture, Sports, Science and Technology for their scholarship during his study and research in Japan.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 132 • Issue 2 • February 2006
Pages: 304 - 311
Copyright
© 2006 ASCE.
History
Received: Aug 5, 2004
Accepted: Jul 26, 2005
Published online: Feb 1, 2006
Published in print: Feb 2006
Notes
Note. Associate Editor: Reginald DesRoches
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