Analysis of wave scattering in 3-layer piezo composite structure [Pb[ZrxTi1-x]O3-ALN-Pb[ZrxTi1-x]O3]
03 Apr 2021-Mechanics Based Design of Structures and Machines (Taylor & Francis)-Vol. 49, Iss: 3, pp 307-328
TL;DR: In this paper, an analytical model has been considered to study the scattering phenomenon of the quasiplane wave in functionally graded piezoelectric material (FGPM) layer sandwiched between two similar Piezoele components.
Abstract: An analytical model has been considered to study the scattering phenomenon of the quasi-plane wave in functionally graded piezoelectric material (FGPM) layer sandwiched between two similar piezoele...
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TL;DR: In this paper , the authors investigated the propagation characteristics of horizontally polarized shear waves (SH waves) in a composite structure comprised of a Functionally Graded (FG) buffer layer sandwiched between an overlying transversely isotropic Piezo-Fiber-Reinforced Composite (PFRC) material guiding layer and an underlying TS-Poroelastic (PP) half-space.
Abstract: Love wave sensors are highly sensitive devices owing to the concentration of acoustic energy within a few wavelengths of the surface. The basic model of these high-performance devices is layered structures composed of highly sensitive composite and functionally graded materials. Thus the present work aims to establish an analytical framework to investigate the propagation characteristics of horizontally polarized shear waves (SH waves) in a composite structure comprised of a Functionally Graded (FG) buffer layer sandwiched between an overlying transversely isotropic Piezo-Fiber-Reinforced Composite (PFRC) material guiding layer and an underlying transversely isotropic Piezo-Poroelastic (PP) half-space. The motive considering the gradient materials, especially at the interface adjoining the layers, is to avoid the discontinuity of the inter-laminar stress and high local stress fields, which can arise around the edges of the laminates due to material mismatch across the interface. The functional gradient of the buffer layer is configured in terms of volume fractions of the guiding layer and the half-space material. The power series technique is employed to solve the governing equations of the FG-buffer layer. For the propagating SH wave, the dispersion relation relating the wave number with phase velocity through the mechanical and electrical parameters of the PFRC and PP materials, the gradient parameter, and the widths of the guiding and buffer layer is presented for the electrically open (EO) as well as electrically shorted (ES) conditions. Furthermore, mass loading sensitivity is analyzed by coating a fine layer on the free surface of the structure. The obtained results on the dispersion relations are compared and found to be in well-agreement with some of the outcomes available in the extant literature, thus validating the present study. To graphically delineate the impact of all influencing parameters, a layered structure of ZnO-Epoxy (PFRC)/ FG-buffer Layer/PZT-1 (PP) is considered. Also, the mass loading sensitivity is graphically illustrated for the coating of a fine layer of SiO2 on the free surface. The present study may be applied for a myriad of engineering applications like manufacturing and optimizing sensors, actuators, transducers, etc. The obtained results are specifically useful for developing and enhancing the performance of surface acoustic wave (SAW) devices/Love wave sensors.
12 citations
TL;DR: In this article, a theoretical investigation has been carried out to analyze the propagation of shear horizontal surface waves (SH-waves) in a structure consisting of a functionally graded p...
Abstract: In the present article, a theoretical investigation has been carried out to analyze the propagation of shear horizontal surface waves (SH-waves) in a structure consisting of a functionally graded p...
8 citations
TL;DR: In this article, the field equations of isotropic dielectrics with centrosymmetric microstructures are specialized to take into account the effects of micro-inertia, flexoelectricity, and non-uniform strain.
Abstract: Taking into consideration the effects of micro-inertia, flexoelectricity, and non-uniform strain, the field equations of isotropic dielectrics with centrosymmetric microstructures are specialized f...
7 citations
TL;DR: In this article, the reflection and transmission properties of quasi-longitudinal plane (QP) waves in an AlN-ZnO laminated composite structure were investigated and the algebraic equations were obtained by imposing boundary conditions on the common interface of the laminated structure.
Abstract: We examine the reflection and transmission phenomena of quasi-longitudinal plane (QP) waves in an AlN-ZnO laminated composite structure. The structure is designed under the influence of the initial stresses in which one carrier piezoelectric semiconductor (PSC) half-space is in welded contact with another PSC half-space. The secular equations in the transversely isotropic PSC material are derived from the general dynamic equation, taking the initial stresses into consideration. It is shown that the incident quasi-longitudinal wave (QP-mode) at the interface generates four types of reflected and transmitted waves, namely, QP wave, quasi-transverse (QSV) wave, electric-acoustic (EA) wave, and carrier plane (CP) wave. The algebraic equations are obtained by imposing the boundary conditions on the common interface of the laminated structure. Reflection and transmission coefficients of waves are obtained by implementing Cramer’s rule. Profound impacts of the initial stresses and exterior electric biasing field on the reflection and transmission coefficients of waves are investigated and presented graphically.
5 citations
TL;DR: In this article , the reflection and transmission of waves at an interface of piezoelectric (ALN and PZT-5T) half-spaces with microstructures were investigated.
2 citations
References
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TL;DR: In this article, the authors analyzed the transference of elastic waves in a composite structure following the elastic wave theory of magneto-electro-elasticity and used the Liouville-Green (LG) approximation technique to solve the differential equation.
52 citations
TL;DR: In this article, the propagation of shear horizontal waves in laminated piezomagnetic/piezoelectric plates was investigated using the ordinary differential equation and stiffness matrix methods.
Abstract: The propagation of shear horizontal waves in laminated piezomagnetic/piezoelectric plates was investigated using the ordinary differential equation and stiffness matrix methods. Commonly used materials, namely barium titanate as piezoelectric ‘B’ and cobalt ferrite as piezomagnetic ‘F’, were retained for illustration. The dispersion curves of the first five modes were shown for different sequences F/F, B/B, and F/B. The effects of thickness ratio on phase and group velocities as well as the influence on the magneto-electromechanical coupling factor of the first mode were investigated. Large magneto-electromechanical coupling factors could be achieved by an appropriate adjustment of the thickness ratio. The present investigation is of practical interest for developing new layered composites made of smart piezoelectric and piezomagnetic devices for engineering applications.
46 citations
TL;DR: In this paper, the reflection and transmission of the plane wave propagating in three-dimensional multilayered magneto-electro-elastic (MEE) plates which are immersed in liquid are investigated.
44 citations
TL;DR: In this paper, the propagation of plane vertical transverse waves at an interface of a semi-infinite piezoelectric elastic medium under the influence of the initial stresses is discussed.
Abstract: The propagation of plane vertical transverse waves at an interface of a semi-infinite piezoelectric elastic medium under the influence of the initial stresses is discussed. The free surface of the piezoelectric elastic medium is considered to be adjacent to vacuum. We assumed that the piezoelectric material is anisotropic of the type of a transversely isotropic crystals (hexagonal crystal structure, class 6 mm). For an incident of vertical transverse plane wave, four types (two for the displacement and two for the electric potential) of reflected plane waves, called quasi-longitudinal (qP) and quasi-shear vertical (qSV) waves are shown to be exist. The relations governing the reflection coefficients of these reflected waves for various boundary conditions (mixed-free-fixed) are derived. It has been shown analytically that reflected coefficients of (qP) and (qSV) waves depend upon the angle of incidence, the parameters of electric potential, the material constants of the medium as well as the initial stresses presented in the medium. The numerical computations of reflection coefficients for different values of initial stresses have been carried out by computer for aluminum nitride (AlN) as an example and the results are given in the form of graphs. Finally, particular cases are considered in the absence of the initial stresses and the electric potential. Some of earlier studies have been compared to the special cases and shown good agreement with them.
40 citations
TL;DR: In this paper, the influence of mechanically and dielectrically conducting interface on the characteristics of surface wave transmission in a piezo-structure with flexoelectric effect at the nanoscale level is analyzed.
Abstract: This research article manifests the influence of mechanically and dielectrically conducting interface on the characteristics of surface wave transmission in a piezo-structure with flexoelectric effect at the nanoscale level. The considered model consists a piezoelectric (Lithium Niobate (LiNbO3)) layer resting on piezoelectric (lead zirconate titanate (PZT-5H)) half-space. The imperfect interface includes mechanically compliment and dielectrically weakly conducting interface, mechanically compliment and dielectrically highly conducting interface, mechanically debond interface and dielectrically insulating interface. Complex dispersion relations are obtained analytically in determinant form corresponding to electrically open and short circuit cases. A numerical example has been provided to highlight the influences of different affecting parameters (like layer thickness, flexoelectric parameter, degree of dielectric and mechanically imperfect interface) on the phase velocity curve. Salient outcomes of the present study have been shown graphically.
36 citations