Decoupling of plane waves in porous piezoelectric materials

Abstract

In this paper, the analytical and numerical studies of two-dimensional wave propagation in porous piezoelectric materials (PPMs) are carried out. The decoupling of waves, in such materials for various crystal classes, is studied analytically for different coordinate planes. It is found that, for wave propagation in a plane, the system is decoupled in some crystal classes, whereas it remains coupled in other crystal classes. It is established that the decoupled pure-shear wave, propagating in a PPM, can be stiffened or unstiffened with piezoelectric effects even if the PPM belongs to the same symmetry group but has a different crystal class. The skewing angles and mutual angles between the polarization directions of different waves are also computed numerically.

Theory of elastic wave propagation in a fluid-saturated multi-porous medium with multi-permeability

“…These waves have been investigated by Sing et al [55], Pramanik & Manna [56], Gupta et al [57] and Kumari et al [58], among others. Notably, Vashishth & Gupta [59] delved into the decoupling of plane waves in a piezo-poroelastic medium, while Sharma [60] examined the impact of the piezoelectric effect on the harmonic plane waves within the same medium.…”

Modeling of an energy harvester with porous piezoelectric/piezomagnetic nanocomposite structure

“…It is well-known that small voids and pores are inevitable in the manufacture of the PE and PM materials. However, the introduction of controlled pores can reduce the self-weight, enhance the design flexibility as well as overcome the inherit brittleness of the PE and PM materials [21][22][23][24]. Biot's porous elasticity theory [25,26] has been successfully applied to the static and dynamic analyses of the porous PE and PM materials.…”

“…Effects of the filled fluid on the mechanical characteristics of the porous PE materials have been investigated both theoretically and experimentally, based on which the constitutive relations of porous PE materials were given [27,28]. Vashishth and Gupta [21,29], Gaur and Rana [30], and Wang [31] discussed the definition and effect of the pore size on dynamic characteristics of PE materials. Inspired by the development of nanoscience and technology, research works on porous materials and structures have been extended to nanoscale.…”