Mechanics of Advanced Materials and Structures ( IF 2.8 ) Pub Date : 2020-09-02 , DOI: 10.1080/15376494.2020.1794083 Mukesh Kumar Pal 1 , Abhishek Kumar Singh 1 , Richa Kumari 1
Abstract
This study delves with the reflection phenomenon of plane-waves due to incidence of quasi-longitudinal (QL) wave at a semi-infinite structure comprising of pre-stressed piezoelectric-orthotropic substrate (POS) with stress-free (Case I) and rigid (Case II) bounding surfaces. The compact-form expressions of reflection-coefficients (RCs) of reflected QL wave, quasi-transverse (QT) wave and evanescent-electroacoustic (EA) wave for different cases of pre-stressed POS are deduced. To unravel effects of higher anisotropy in substrate, comparative analysis in pre-stressed transversely isotopic piezoelectric substrate (TIPS) medium with stress-free (Case III) and rigid (Case IV) boundaries is carried out. PVDF and ALN materials are considered for numerical computations. For validation, energy-partition and conditions of grazing incidence for all the undertaken cases are analyzed.
中文翻译:
平面波在预应力压电正交基片的无应力和刚性边界面上的反射:一种比较方法
摘要
本研究探讨了由于准纵向 (QL) 波在由预应力压电正交各向异性基板 (POS) 与无应力 (案例 I) 和刚性组成的半无限结构的入射引起的平面波反射现象(案例二)边界表面。推导了不同预应力POS情况下反射QL波、准横波(QT)波和倏逝电声(EA)波的反射系数(RCs)的紧致表达式。为了揭示衬底中较高的各向异性的影响,对具有无应力(情况 III)和刚性(情况 IV)边界的预应力横向同位素压电衬底 (TIPS) 介质进行了比较分析。PVDF 和 ALN 材料被考虑用于数值计算。为了验证,