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首页> 外文期刊>Physica Scripta: An International Journal for Experimental and Theoretical Physics >Rayleigh wave propagation in semi-infinite flexoelectric dielectrics
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Rayleigh wave propagation in semi-infinite flexoelectric dielectrics

机译：半无限柔性电介质中的Rayleigh波传播

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摘要

With consideration of the static bulk flexoelectric effect, dynamic bulk flexoelectric effect, strain gradient elastic effect and micro-inertia effect, Rayleigh wave propagation in semi-infinite centrosymmetric flexoelectric dielectrics is investigated and the dispersion relation is derived. Numerical results of the Rayleigh wave propagation in single crystal SrTiO3 indicate that, the strain gradient elastic effect and the micro-inertia effect have competing influences on the wave velocity, and the ratio of the corresponding two internal length scales is essential to the dispersion curve. However, these effects are remarkable only when the wave number is relatively large. In addition, the static bulk flexoelectric effect is found to reduce the Rayleigh wave velocity especially when the static bulk flexocoupling coefficient is large. Furthermore, influences of the dynamic bulk flexoelectric effect and the polarization gradient effect on the Rayleigh wave propagation are also examined that they both hinge on the flexocoupling coefficient other than the related material constants.
机译：考虑到静态块屈光度效应，动态散装屈光度效应，应变梯度弹性效果和微惯性效应，研究了半无限偏差柔性电界中的瑞利波传播，衍生分散关系。单晶SRTIO3中的瑞利波传播的数值结果表明，应变梯度弹性效果和微惯性效应对波速度的竞争影响，并且相应的两个内部长度尺度的比率对分散曲线至关重要。但是，只有当波数相对较大时，这些效果才是显着的。另外，发现静态块屈光度效应降低了瑞利波速度，特别是当静态散装弯曲耦合系数大时。此外，还检查了动态散装柔性效应和偏振梯度影响对瑞利波传播的影响，它们均铰链除相关材料常数以外的柔性耦合系数上。

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