Vibration behavior of visco-elastically coupled sandwich beams with magnetorheological core and three-phase carbon nanotubes/fiber/polymer composite facesheets subjected to external magnetic field

Abstract

In the present research, modeling and vibration analysis of the double of sandwich beams which are coupled by visco-Pasternak medium are investigated. Also, this system is rested on Winkler foundation. Sandwich beams consist of magnetorheological core and carbon nanotubes/fiber/polymer composite facesheets. The material properties of magnetorheological core are obtained using the experimental data available in literature. Halpin–Tsai model is utilized to determine the material properties of carbon nanotubes/fiber/polymer composite facesheets. Hamilton principle is used to obtain the equations of motion of this system. Based on Navier’s method, a closed-form solution is presented for free vibration analysis of coupled magnetorheological sandwich beams under simply supported boundary conditions. The effects of various parameters such as core-to-facesheets thickness ratio, length-to-thickness ratio, magnetic field intensity, volume fractions of carbon nanotubes, and fibers and visco-Pasternak coefficients on the natural frequencies and loss factors of coupled system are discussed. The results show that the modal loss factor, unlike natural frequency, decreases by increasing magnetic field intensity. These findings can be used in design and manufacturing of sandwich structures.

Vibration analysis of magnetorheological fluid circular sandwich plates with magnetostrictive facesheets exposed to monotonic magnetic field located on visco-Pasternak substrate

“…Pre- and post-yield are the regions where both shear stress and strain of MR fluids are characterized in. In the pre-yield region, the shear stress and strain are related to each other on the basis of linear viscoelastic theory as below (Ghorbanpour Arani et al, 2017a)…”

Numerical analysis of multiphysical field for independent three-stage magnetorheological damper of double rod during recoil process of artillery

“…At Virginia Tech University, Ahmadian et al. 15 designed the gun recoil damper for high speed, and established dynamic model of anti-sitting process and its high shear test confirms the possibility of MR damper used in the anti-sitting of artillery. At Nanjing University of Science and Technology, Qing et al.…”

“…It not only gradually achieves good results in the simple anti-vibration control, but also provides possible electromechanical system impact buffer design in the complex conditions. 15 The buffer device has been gradually extended to the automotive suspension system vibration, aircraft landing gear shock absorber, anti-vibration impact of the gun recoil, etc. 16–18 In fact, MR technology has been applied to the field of military engineering and weapon damping system at home and abroad.…”

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

“…Momeni et al (2017) introduced the oscillation analysis of laminated composite beams filled with MR fluids under accidental loading applying experimental and also simulation approaches. Ghorbanpour Arani et al (2019) studied vibration behavior of viscoelastically coupled sandwich beams with MR fluid core and three-phase carbon nanotubes/fiber/polymer composite face sheets exposed to external magnetic field. They illustrated that by enhancing the magnetic field severity, the modal loss factor, unlike the natural frequency, decreases.…”