THEORETICAL AND EXPERIMENTAL STUDY ON THE PIEZOCERAMIC ACTUATING LAMINATE

Piezoelectric ceramic element (PCE) is a kind of actuator applied widely on the intelligent material & structure. Establishing the relationship between the transferring stress and the controlling signal, namely the transferring and actuating equation, is a key step to analyze the actuating performance of the PCE. Based on the method of the shear lag theory, the procedure of the stress transferring is analyzed and the transferring and actuating model is established in this paper. Some measurements for PCE(PZT5) actuating the Glass Fiber/Epoxy laminate have been done to verify the model established. The experimental results show that the theoretical model agrees well with the practice. Finally, the effect of the main factors on PCE actuating the laminate is studied by using the experimental and theoretical results.

压电陶瓷元件是目前在智能材料结构中广泛使用的一种驱动元件。建立驱动应力与控制信号之间的关系即传递驱动方程，对于分析压电陶瓷元件的驱动特性非常必要。本文以剪滞变形理论为基础，分析了压电陶瓷元件在驱动结构时的应力传递过程，建立了传递驱动模型；并以ＰＺＴ５型压电陶瓷元件驱动玻纤／环氧层合板为例对所建模型进行了实验验证。结果表明，建立的驱动模型与实际情况比较吻合。最后，根据实验结果和所建模型对影响压电陶瓷元件驱动层合板性能的一些主要参数作了分析。