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|Title:||A modified electro-mechanical impedance model of piezoelectric actuator-sensors for debonding detection of composite patches|
|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|
|Appears in Collections:||Staff Publications|
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