Effect of initial stress on the propagation behavior of Love waves in a layered piezoelectric structure
Effect of initial stress on the propagation behavior of Love waves in a layered piezoelectric structure
复制标题
层状压电结构中初始应力对乐夫波传播行为的影响
DOI：
10.1016/s0020-7683(00)00009-3
复制
发表时间：
2001-01-01
影响因子：
3.6
通讯作者：
Wang, TJ
中科院分区：
文献类型：
--
作者：
Liu, H;Wang, ZK;Wang, TJ
本文研究了具有初应力的层状压电结构中Love波的传播行为。它包括一层薄的压电层，它完美地结合在弹性衬底上。通过求解耦合电机场方程，得到了压电层和弹性衬底的机械位移和电势函数的解。分别得到了自由表面电开路和短路情况下，层状压电结构中Love波传播和应力场的相速度方程。分别讨论了初应力对相速度、应力场和机电耦合系数的影响。考虑了三组压电层-弹性基板系统，即BaTiO_3陶瓷层-硼硅酸盐玻璃基板、PZT-SH陶瓷层-硼硅酸盐玻璃基板和PZT-SH陶瓷层-SiO_2玻璃基板。结果表明，Love波传播的相速度随初始应力的增大而减小。当初始应力大于100 Mpa时，耦合机电因子显著增加。这对声表面波器件的设计具有一定的参考价值。(C)2000爱思唯尔科学有限公司。保留所有权利。
The propagation behavior of Love waves in a layered piezoelectric structure with an initial stress is investigated in this article. It involves a thin piezoelectric layer bonded perfectly to an elastic substrate. Solutions of the mechanical displacement and electrical potential function are obtained for the piezoelectric layer and elastic substrate by solving the coupled electromechanical field equations. The phase velocity equations of the Love wave propagation and the stress fields in the layered piezoelectric structure are obtained for electrical open and short cases on the free surface, respectively. The effect of the initial stress on the phase velocity, the stress fields and the coupled electromechanical factor are discussed, respectively. Three sets of piezoelectric layer-elastic substrate systems are considered, i.e. BaTiO3 ceramic layer-borosilicate glass substrate, PZT-SH ceramic layer-borosilicate glass substrate, and PZT-SH ceramic layer-SiO2 glass substrate. It is seen that the phase velocity of the Love wave propagation decreases with the increase of the magnitude of the initial stress. The coupled electromechanical factor increases remarkably, as the magnitude of the initial the stress is greater than 100 MPa. This is useful for the design of acoustic surface wave devices. (C) 2000 Elsevier Science Ltd. All rights reserved.