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首页> 外文期刊>Journal of computational and theoretical nanoscience >Influence of Initial Stresses and Piezoelectric Constants on the Propagation Bulk Acoustic Waves in an Anisotropic Smart Material (Aluminum Nitrite)
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Influence of Initial Stresses and Piezoelectric Constants on the Propagation Bulk Acoustic Waves in an Anisotropic Smart Material (Aluminum Nitrite)

机译：初始应力和压电常数对各向异性智能材料（亚硝酸铝）中传播堆积声波的影响

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摘要

The aim of this paper is to illustrate the effect of initial stresses on the propagation of plane waves in a general anisotropic elastic medium. Therefore, an analytical analysis supported by numerical tests to calculate the bulk acoustic wave propagation in Aluminum Nitrite (AlN) aspiezoelectric hexagonal elastic material has been presented. In addition, the Christoffel’s equation has been solved and the corresponding eigenvalues and eigenvectors have been obtained. Then, an explicit expressions of the waves propagation with three distinct phase velocities in anisotropicpiezoelectric material including the effect of the initial stresses have been derived. The three velocities of bulk acoustic waves (BAW) which are called quasi-longitudinal, quasi-shear vertical and quasi-shear horizontal for Aluminum Nitrite are numerically calculated. The numerical examplesare considered to illustrate graphically the effect of initial stresses on the variations of velocities of the BAW versus the angle of the propagation. The velocities of BAW change significantly with initial stresses as well as piezoelectric constants. This research is theoretically usefulin signal processing, sound system, wireless communication and for the design of surface acoustic wave (SAW) devices with high performance.
机译：本文的目的是说明初始应力对一般各向异性弹性介质中平面波传播的影响。因此，已经介绍了用数值测试支持的分析分析，以计算亚硝酸盐（ALN）ASPIEZo电六方弹性材料中的体积声波传播。此外，已经解决了Christoffel的等式，并且已经获得了相应的特征值和特征向量。然后，已经推导出包括初始应力的效果的具有三个不同的相位速度的波的显式表达。数量计算称为准纵向，准剪切垂直和亚硝酸铝水平的准剪切的块状声波（BAW）的三个速度。该数值示例认为以图形方式示出初始应力对BAW速度变化的影响与传播的角度。倾斜的速度显着改变初始应力以及压电常数。该研究是理论上有用的信号处理，声音系统，无线通信和具有高性能的表面声波（SAW）器件的设计。

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