PROPAGATION OF SURFACE ACOUSTIC WAVES IN PRESTRESSED ANISOTROPIC LAYERED PIEZOELECTRIC STRUCTURES  

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

机构地区：[1]Department of Engineering Mechanics,Shanghai Jiaotong University,Shanghai 200240,China [2]Department of Engineering Mechanics,Xi’an Jiaotong University,Xi’an 710048,China

出　　处：《Acta Mechanica Solida Sinica》2003年第1期16-23,共8页固体力学学报（英文版）

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

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.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.

关 键 词：surface acoustic waves layered piezoelectric structure phase velocity electromechanical coupling coefficient 

分 类 号：TB52[理学—物理]