Effects of porosity on wave propagation in piezomagnetic materials

• Main Authors: Vashishth, Anil K., Gupta, Vishakha, Bareja, Umang
• Format: Conference Proceeding
• Language: English
• Subjects: Constitutive equations; Constitutive relationships; Coupling; Magnetic properties; Phase velocity; Plane waves; Porosity; Porous materials; Porous media; Propagation velocity; Wave propagation
• ISSN: 0094-243X; 1551-7616
• DOI: 10.1063/5.0234395

Piezomagnetic materials exhibit distinctive coupling between mechanical and magnetic properties, making them in-triguing for various applications. In this paper, plane wave propagation in piezomagnetic materials is studied analytically as well as numerically. Constitutive equations and governing equations for porous piezomagnetic materials are derived. Subsequently, the Christoffel equation is formulated to describe the propagation of plane harmonic waves in such a medium. The roots of this equation yield four complex velocities of waves propagating in the medium. These complex velocities define the phase velocity of propagation and the attenuation factor of all waves along a given phase direction. Numerical observations are made to examine the dependence of phase velocity on the direction of propagation, porosity, frequency, and piezomagnetic coupling for a specific piezomagnetic material. The study also includes an exploration of slowness curves and velocity curves.