Circumferential interaction of shear waves with doubly piezomagnetic materials made cylindrical structure
摘要
The current study explores horizontally polarized shear wave (SH-wave) in a piezomagnetic cylindrical structure encompassed an inner piezomagnetic medium cylinder imperfectly coupled to a coordinated functionally graded piezomagnetic material (FGPMM) cylindrical medium of bounded width. An imperfection at the interface of cylindrical structure is taken into consideration, which may exist in practice as a result of mechanical or magnetic damage. The functionally graded (FG) in the outer FGPMM cylindrical medium is anticipated to fluctuate constantly in the radial direction. For the computation of displacements and stress components of the cylindrical medium, analytical techniques have been deployed. Dispersion equations for shear wave propagation have been established under supportable boundary conditions for magnetically open (MO) and magnetically short (MS) conditions. As a particular case of the research, the dispersion equations are inferred to the classical Love wave equation, which ensures the validation of present study. The effect of significant factors in the dispersion equations affecting the velocity distribution of the SH-wave has been analyzed through numerical simulations and graphical depictions. Plotting dispersion curves has been done to reveal the quirks of parameters viz. radii ratio, functional gradient parameter, Order of Bessel’s function occurring in the dispersion equations, mechanical and magnetic imperfections associated with the imperfection bonding of piezomagnetic cylindrical structure. For numerical computation purposes, piezomagnetic material constants of cobalt ferrite and Terfenol-D have been considered. This research could have significant practical and dynamic algorithms in the production and enhancement of piezomagnetic sensors and transducers. Additionally, wave transference in smart materials (such as piezoelectric, magneto-electro-elastic and metamaterials) have properties that can dynamically change in response to external stimuli (e.g., electric, magnetic, thermal, or mechanical fields). These materials enable adaptive wave control, which can be leveraged for applications like vibration damping, energy harvesting, non-destructive testing, and waveguiding.