非理想界面功能梯度压电/压磁双材料中的SH界面波

SH interfacial wave in a functionally graded piezoelectric /piezomagnetic bi-material with an imperfect interface

研究了非理想界面功能梯度压电/压磁双材料中SH界面波的传播特性,这里假定上、下半空间材料性能在垂直于界面的方向是按指数函数变化的。界面的机械条件由"弹簧"模型表征,即应力是连续的而位移是间断的;界面电磁学条件考虑电位移、电势、磁感、磁势连续和电学短路、磁学开路两种情况。推导了界面波显函形式的频散方程,通过数值计算表明了材料组合形式、界面非理想程度以及材料梯度变化对界面波相速度的影响。

The propagation behavior of shear horizontal （SH）interfacial wave in a functionally graded piezoelectric （FGPE）/functionally graded piezomagnetic（FGPM）bi-material with an imperfect interface was investigated,where the materials properties were assumed to vary exponentially in the direction normal to the interface.The so-called “spring”model was used to describe the mechanical property of the interface,namely the stresses are continuous along the interface while the mechanical displacements are noncontinuous, and two cases on the interface were assumed：the electromagnetically permeable bonding and electromagnetically absorbent bonding.The dispersion equation of interface wave was derived in explicit form,and the numerical examples were provided to show the influences of the different material combinations,the imperfect degree of interface and the gradient variation of material constants on the phase velocity.