Resonance-based bonding detection for piezoelectric fiber composites

Dwo W. Wang*, Ching-Chung Yin


研究成果: Conference article同行評審


A resonance-based method is presented to determine the bonding conditions of piezoelectric fiber composite (PFC) patches attached to host structures. The PFCs are used to be functional materials by applying voltage through the interdigital electrodes symmetrically aligned on opposite surfaces of the composite patches. Interfacial debonds usually degrade the function. Only the edge debonds are taken into account in this paper. A partially debonded patch bears an in-plane extensional vibration if the interdigital electrodes are excited by a sinusoidal voltage. Electric impedance of the PFC patch adhered on an aluminum plate was measured in a broad frequency range to seek the resonant frequencies. The modal characteristics depend on the size of debond, material properties of the PFC, and stiffness of remaining adhesive in front of the edge debond. Extensional vibration of an elastic sheet is characteristic of the resonant frequencies being inversely proportional to the debonding length. The lowest several modes are considered. Experimental results indicate that self-detecting progressive debonding between the PFC patch and the host plate is feasible.

期刊Proceedings of SPIE - The International Society for Optical Engineering
出版狀態Published - 1 12月 2009
事件International Conference on Experimental Mechanics 2008, ICEM 2008 - Nanjing, China
持續時間: 8 11月 20088 11月 2008


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