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Surface waves in electrostrictive materials under biasing fields

机译:偏置场下电致伸缩材料中的表面波

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摘要

The theory of small incremental fields superposed on finite biasing fields in an electroelastic body is summarized first in this paper. The Stroh formalism for two-dimensional anisotropic elasticity and piezoelectricity is generalized to two-dimensional problems of an electroelastic body under biasing mechanical and electric fields. Application of this generalized Stroh formalism to study surface waves propagating in an electroelastic half-space under uniform initial fields indicates that there exist at most two surface waves even in the presence of biasing fields and these two surface waves correspond to the well-known Rayleigh and Bleustein waves in the mechanical nature. A simple procedure is established to distinguish these two types of waves. Application of the results to a model electrostrictive material is included for illustration. It is found that initial biasing fields can greatly influence propagation feature of surface waves.
机译:本文首先总结了电弹性体中叠加在有限偏置场上的小增量场的理论。二维各向异性弹性和压电性的Stroh形式主义被推广到在偏置的机械和电场作用下电弹性体的二维问题。应用这种广义的Stroh形式主义研究在均匀初始场下在电弹性半空间中传播的表面波,表明即使在存在偏置场的情况下,也最多存在两个表面波,这两个表面波对应于著名的Rayleigh和布鲁斯坦(Bleustein)具有机械性质。建立了一个简单的程序来区分这两种类型的波。包括结果应用于模型电致伸缩材料的说明。发现初始偏置场会极大地影响表面波的传播特性。

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