Wave propagation analysis of a rectangular sandwich composite plate with tunable magneto-rheological fluid core

Abstract

<jats:p> This study presents an investigation of the wave propagation of a rectangular sandwich composite plate with tunable magneto-rheological fluid core. The constituent parts of this rectangular sandwich composite plate are the base layer, magneto-rheological fluid core, and limiter layer. Magneto-rheological fluid core is embedded within the base and limiter layers. Also, the upper and lower layers are made of elastic materials. For obtaining the governing equations of motion, Hamilton’s principle and classical plate theory are used. After that, applying an analytical solution, the wave frequency and phase velocity of the propagated waves can be gained by solving eigenvalue problem. By investigating the effect of the magnetic field, the results emphasize that the magnetic field intensity is the most important factor for changing the value of the wave frequency and phase velocity. Besides, results show by enhancing the core-to-top layer thickness ratio, the wave frequencies reduce because magneto-rheological fluid core is softer in comparison to elastic layers. Therefore, magneto-rheological fluid layer operates similar to a damper. At the end, the influence of the thickness of magneto-rheological fluid core on the phase velocity is also discussed. </jats:p>

Magneto‐/ electro‐responsive polymers toward manufacturing, characterization, and biomedical/ soft robotic applications

“…In the framework of an analytical investigation, it was proven that it is possible to attenuate the amplitude of the panels' vibration by aggrandizing the intensity of the magnetic field if an MRE is utilized as the core layer [425] . MREs are also able to tailor the dispersion characteristics of waves scattered in continuous systems [426] . The aforementioned feature can be well utilized for the sake of defect detection via non-destructive testing by checking wave propagation curves of desired continua [427] .…”

Applications of Magnetorheological Fluid Actuator to Multi-DOF Systems: State-of-the-Art from 2015 to 2021

“…Eshaghi investigated the aeroelastic stability of sandwich plates containing MR fluid as a core layer under supersonic airflow, where the effects of the MR fluid, the magnetic field, the boundary conditions, and the plate parameters on the flutter boundaries of sandwich MR plates were analyzed [25]. Ebrahimi and Sedighi studied the wave propagation of a rectangular sandwich composite plate containing a tunable MR fluid core, and it was determined that the magnetic field intensity was the most significant factor for changing the wave frequency and the phase velocity of the propagated waves [26]. Table 1 summarizes many different recent studies on MR fluid sandwich structures.…”