Abstract

A closed form solution based on a quasi-3D theory taken into account the thickness-stretching effect is developed and proposed to describe bending, buckling and vibration behavior of novel sandwich beams. The faces of the sandwich beams are made of functionally graded graphene platelet reinforced composites (FG-GPLRC) and their core layer is produced from functionally graded porous (FGP) material. Various shear deformation models are utilized to determine the solutions of the sandwich beams with different patterns of graphene platelet (GPL) reinforcement at the faces and a range of porosity distributions at the core. New modification on material property estimation across the total thickness of the sandwich beams is first established in this study to show the structural performance produced from the smoothness of GPLs and porous distributions. Thus, handling the mechanical behavior of the innovative sandwich beams using the quasi-3D theory motivate us to investigate its precise operation in predicting stresses, deformation, critical buckling load, and the natural frequency of the beams. According to our computation, compared to the findings predicted by the 1D-higher shear deformation theory, it can be shown that the quasi-3D theory yields larger deflection results and lower critical buckling load and natural frequency results.