| PROPAGATION OF SURFACE ACOUSTIC WAVES IN PRESTRESSED ANISOTROPIC LAYERED PIEZOELECTRIC STRUCTURES |
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| 作者姓名： | Liu Hua Kuang Zhenbang Cai Zhengming |
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| 作者单位： | Liu Hua Kuang Zhenbang Cai Zhengming (Department of Engineering Mechanics，Shanghai Jiaotong University，Shanghai 200240，China)Wang Tiejun Wang Zikun (Department of Engineering Mechanics，Xi'an Jiaotong University，Xi'an 710048，China) |
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| 基金项目： | Project supported by the National Natural Science Foundation of China(Nos.10132010 and 10072033) |
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| 摘 要： | The propagation of surface acoustic waves in layered piezoelectric structures withinitial stresses is investigated.The phase velocity equations are obtained for electrically free andshorted cases,respectively.Effects of the initial stresses on the phase velocity and the electrome-chanical coupling coefficient for the fundamental mode of the layered piezoelectric structures arediscussed.Numerical results for the c-axis oriented fihn of LiNbO_3 on a sapphire substrate aregiven.It is found that the fractional change in phase velocity is a linear function with the ini-tial stresses,and the electromechanical coupling factor increases with an increase of the absolutevalues of the compressive initial stresses.The results are useful for the design of surface acousticwave devices.
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PROPAGATION OF SURFACE ACOUSTIC WAVES IN PRESTRESSED ANISOTROPIC LAYERED PIEZOELECTRIC STRUCTURES |
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| Liu Hua Kuang Zhenbang Cai Zhengming.PROPAGATION OF SURFACE ACOUSTIC WAVES IN PRESTRESSED ANISOTROPIC LAYERED PIEZOELECTRIC STRUCTURES[J].Acta Mechanica Solida Sinica,2003,16(1):16-23. |
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| Authors: | Liu Hua Kuang Zhenbang Cai Zhengming |
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| Institution: | (1) Department of Engineering Mechanics, Shanghai Jiaotong University, Shanghai 200240, China, CN;(2) Department of Engineering Mechanics, Xi'an Jiaotong University, Xi'an 710048, China, CN |
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| Abstract: | The propagation of surface acoustic waves in layered piezoelectric structures with initial stresses is investigated.The phase velocity equations are obtained for electrically free and shorted cases,respectively.Effects of the initial stresses on the phase velocity and the electrome- chanical coupling coefficient for the fundamental mode of the layered piezoelectric structures are discussed.Numerical results for the c-axis oriented fihn of LiNbO_3 on a sapphire substrate are given.It is found that the fractional change in phase velocity is a linear function with the ini- tial stresses,and the electromechanical coupling factor increases with an increase of the absolute values of the compressive initial stresses.The results are useful for the design of surface acoustic wave devices. |
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| Keywords: | surface acoustic waves layered piezoelectric structure phase velocity electromechanical coupling coetficient |
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