Please use this identifier to cite or link to this item: https://doi.org/10.1177/104538902761696733
Title: A modified electro-mechanical impedance model of piezoelectric actuator-sensors for debonding detection of composite patches
Authors: Xu, Y.G.
Liu, G.R. 
Keywords: Composites
Damage detection
Impedance model
Piezoelectric actuator-sensors
Issue Date: Jun-2002
Citation: Xu, Y.G., Liu, G.R. (2002-06). A modified electro-mechanical impedance model of piezoelectric actuator-sensors for debonding detection of composite patches. Journal of Intelligent Material Systems and Structures 13 (6) : 389-396. ScholarBank@NUS Repository. https://doi.org/10.1177/104538902761696733
Abstract: A modified electro-mechanical impedance model of piezoelectric actuator-sensors is presented in this study. The presented model treats the bonding layer between a piezoelectric patch and a host structure as a spring-mass-damper system in the coupled electro-mechanical analysis. The effect of bonding layers on the dynamic interaction between piezoelectric actuator-sensors and host structures is thus taken into account. The model is then used for debonding detection of composite patches. A debonding model is accordingly developed. The debonding model uses infinitesimal-length springs to model the joint between a composite patch and its base structure. The spring stiffness varies with the joint rigidity and directly influences the structural mechanical impedance as well as the piezoelectric electric admittance. A numerical example is provided to reveal the effect of bonding layers and demonstrate the feasibility of the proposed detection method.
Source Title: Journal of Intelligent Material Systems and Structures
URI: http://scholarbank.nus.edu.sg/handle/10635/54421
ISSN: 1045389X
DOI: 10.1177/104538902761696733
Appears in Collections:Staff Publications

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