Thereafter, Bleustein provided exact solutions of the equations of the fully coupled linear theory of piezoelectricity for some simple types of two dimensional waves in an infinite piezoelectric plate. A new type of surface wave with no counterpart in a purely elastic homogeneous material was shown to exist in a piezoelectric material by Bleustein. They also reported direct piezoelectric surface wave transduction by a spatially periodic electrode on the plane surface of a piezoelectric plate. Initially, the study of direct piezoelectric coupling to surface elastic waves was accomplished by White and Voltmer. To meet all our aspects, mathematics extends its helping hand by offering numerous analytical techniques, leading to the accomplishment of the desired study. As a matter of fact, many developed mathematical model bestows a comprehensive overview of the concerned physical problem which helps to analyse the physics of the problem more profoundly. These composites have undoubtedly made their presence felt in this cutting edge technology. In the present scenario, there are laudable applications of piezo-technology. there is an internal generation of electrical charge resulting from an applied mechanical force and also generation of a mechanical strain resulting from an applied electrical field. One of the finest features of the piezoelectric materials is its nature to exhibit reversibility, i.e. The voltage of the charge produced is directly proportional to the stress applied. Piezoelectricity is the electric charge that is generated in certain classes of crystalline materials in response to applied mechanical stress. Piezoelectric materials are basically the materials having linear coupling between mechanical and electric fields. In this digital age, piezoelectric composites are foci of a new wave of interest due to the growing range of technological applications. The outcomes of the study may find its worth in better and optimum design of surface acoustic wave devices and Love wave sensors, keeping efficiency at its premium. For sake of validation, the obtained results are matched with the classical one, as a special case of the problem. piezoelectric constants, dielectric constants, piezoelectric loss moduli, dielectric loss moduli, exponential gradient parameter and magnifying gradient parameters on the phase velocity and attenuation coefficient of Love-type wave. The study manifests the impact of the material medium parameters, viz. Diagnostic results are simulated numerically which forefronts the effect of distinct parameters. The phase velocity profile and attenuation coefficient profile of Love-type wave is portrayed graphically. To depict the results numerically, two distinct piezoelectric-viscoelastic materials (Epoxy-BNKLBT and Epoxy-KNLNTS ceramics) for EGPVM stratum and FGPVM substrate are taken into account. ![]() The established frequency equation is in complex form of which the real expression imparts the frequency curve and imaginary expression gives the attenuation curve of Love-type wave. The analytical solution procedure involves the use of suitable Green's function and admissible boundary conditions. ![]() The electro-visco-mechanical field equations are laid down for the piezoelectric-viscoelastic medium. The present study aims to analyze the propagation behavior of Love-type wave in an exponentially graded piezoelectric-viscoelastic material (EGPVM) stratum lying over a functionally graded piezoelectric-viscoelastic material (FGPVM) substrate due to an impulsive point source at its interfacial surface. The usage of a passive polymer (Epoxy) with active piezoelectric ceramic causes viscoelasticity in the piezoelectric material which results into a piezoelectric-viscoelastic composite. The analysis of wave propagation phenomenon piezoelectric-viscoelastic composites still remains an unexplored field of research.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |