PROPAGATION OF SURFACE ACOUSTIC WAVES IN PRESTRESSED ANISOTROPIC LAYERED PIEZOELECTRIC STRUCTURES

作     者：Liu Hua Kuang Zhenbang Cai Zhengming Wang Tiejun Wang Zikun 

作者机构：Department of Engineering MechanicsShanghai Jiaotong UniversityShanghai 200240China Department of Engineering MechanicsXi’an Jiaotong UniversityXi’an 710048China 

出 版 物：《Acta Mechanica Solida Sinica》 (固体力学学报（英文版）)

年 卷 期：2003年第16卷第1期

页      面：16-23页

核心收录：

学科分类：08[工学] 0804[工学-仪器科学与技术] 

基　　金：Project supported by the National Natural Science Foundation of China(Nos.10132010 and 10072033) 

主　　题：surface acoustic waves layered piezoelectric structure phase velocity electromechanical coupling coefficient 

摘      要：The propagation of surface acoustic waves in layered piezoelectric structureswith initial stresses is investigated. The phase velocity equations are obtained for electricallyfree and shorted cases, respectively. Effects of the initial stresses on the phase velocity and theelectromechanical coupling coefficient for the fundamental mode of the layered piezoelectricstructures are discussed. Numerical results for the c-axis oriented film of LiNbO_3 on a sapphiresubstrate are given. It is found that the fractional change in phase velocity is a linear functionwith the initial stresses, and the electromechanical coupling factor increases with an increase ofthe absolute values of the compressive initial stresses. The results are useful for the design ofsurface acoustic wave devices.