Nonlinear transient thermo-mechanical responses of porous graphene platelet-reinforced cylindrical panels under moving distributed loads

Abstract

This paper is the first attempt, to the best of the authors’ knowledge, to explore the nonlinear temperature-dependent dynamic responses of a porous functionally graded graphene nanoplatelet-reinforced composite (FG-GPLRC) cylindrical panel subjected to a moving distributed load. The desired porous FG-GPLRC structure can be achieved by reasonably designing the inner pore size and GPL dispersion patterns. A temperature-dependent dynamic model is proposed by introducing the equivalent thermo-mechanical parameters of the porous FG-GPLRCs with the help of the Halpin–Tsai micromechanics model, extended rule of mixtures, and open-cell metal foam model. The nonlinear governing equations of motion of nanocomposite cylindrical panels are derived based on the first-order shear deformation theory and the standard Lagrange equation with the aid of von Kármán geometric nonlinearity. Additionally, a closed-form Navier-type solution is implemented to model the simply-supported edges of the structures. Finally, the nonlinear dynamic response is determined using the Newmark direct integration technique combined with the Newton–Raphson iterative scheme. A parametric analysis is conducted, and the results indicate that the present model can predicate the temperature-dependent buckling behaviors and transient dynamic responses of the porous FG-GPLRC cylindrical panel. It is also found that dispersing more GPLs and fabricating more internal pores near the mid-surface of the panel can greatly reduce the response amplitudes induced by the moving loads, and the moving distributed load with a shorter length can result in a higher response.