超声压电陶瓷-聚合物复合换能器-非均相结构的动态行为及影响

Proceedings of 1994 IEEE International Symposium on Applications of Ferroelectrics Pub Date : 1994-08-07 DOI:10.1109/ISAF.1994.522369

Q.M. Zhang, X. Geng, Y. Shui, W. Cao, L. E. Cross

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引用次数: 0

摘要

建立了具有2-2连通性的压电复合材料的动力学理论。在陶瓷-聚合物界面边界条件下，通过求解压电陶瓷板和聚合物区域的耦合动力学方程，得到了复合材料中弹性和电变量的分布。可以确定聚合物与陶瓷在厚度共振处的机电耦合系数、声阻抗、共振频率和弹性耦合。阐明了模态耦合对厚度共振和侧向共振的影响，并估计了这些共振模态的频率对复合材料厚度的依赖关系。理论结果与实验结果进行了比较。

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Ultrasonic piezoceramic-polymer composite transducer-dynamic behavior and effects of heterogeneous structure

A dynamic theory is developed for piezocomposites with 2-2 connectivity. By solving the coupled dynamic equations in the piezoceramic plate and polymer region subjected to the boundary conditions at the ceramic-polymer interface, the distributions of the elastic and electric variables in a composite are obtained. The electromechanical coupling factor, the acoustic impedance, the resonant frequency, and the elastic coupling between the polymer and ceramic at the thickness resonance can be determined. The effects of mode coupling on the thickness resonance and lateral resonance are elucidated and the dependence of the frequency of these resonant modes on the composite thickness can be estimated. Theoretical results are compared with experimental observations.

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Proceedings of 1994 IEEE International Symposium on Applications of Ferroelectrics

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