Bulk wave propagation in layered piezomagnetic/piezoelectric plates with initial stresses or interface imperfections
Bulk wave propagation in layered piezomagnetic/piezoelectric plates with initial stresses or interface imperfections
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DOI：
10.1016/j.compstruct.2012.04.006
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发表时间：
2012-09
影响因子：
6.3
通讯作者：
Y. Zhou;Chao-feng Lu;W. Q. Chen
中科院分区：
文献类型：
--
作者：
Y. Zhou;Chao-feng Lu;W. Q. Chen
使用状态空间方法研究了具有初始应力和不完美界面的层压压磁/压电板中的体波传播。考虑顶面和底面的电和磁开路或短路情况。在各种电磁条件下对波的相速度和频谱进行了数值计算，并分析了归一化模式。尽管数值结果确实表明初始压应力可以降低波在层状多铁性结构中传播的相速度，但其效果并不像文献报道的那样明显，其中初始应力远远超出了实际材料的强度。虽然不完美的界面对频谱的影响比初始应力大得多，因为不完美会降低结构刚度。
Bulk wave propagation in laminated piezomagnetic/piezoelectric plates with initial stresses and imperfect interface is investigated using the state space approach. Either electrically and magnetically open or shorted conditions on the top and bottom surfaces are considered. The phase velocity and frequency spectra of the wave are numerically calculated for various electric and magnetic conditions, and normalized modes are also analyzed. Although numerical results do indicate that the initial compressive stress can reduce the phase velocity of the wave propagating in a layered multiferroic structure, the effect is not as obvious as that reported in literature where the initial stresses were taken far beyond the strength of real materials. While the imperfect interface affect the frequency spectra much greater than initial stresses, because imperfection decreases the structural stiffness.