Effect of porosity on buckling and vibrational characteristics of the imperfect GPLRC composite nanoshell

Due to rapid development of manufacturing process, composite materials with porosity have attracted commercially notices in advanced engineering applications. For this regard, buckling and vibrational characteristics of a porous composite cylindrical nanoshell reinforced with GPLs is investigated in this paper. The material properties of piece-wise graphene-reinforced composites (GPLRC) are assumed to be graded in the thickness direction of a cylindrical nanoshell and are estimated using a nanomechanical model. The novelty of our work is including the effects of porosity and GPLRC on natural frequency, critical axial load and critical temperature of the GPLRC cylindrical nanoshell. The governing equations (GEs) and boundary conditions (BCs) have been developed using Hamilton's principle and have been solved with assistance of the generalized differential quadrature method (GDQM). Besides, for the validation of the results, the results of current model are compared to the results acquired from analytical method. The results show that porosity, GPL distribution pattern, length scale parameter, number of layers and GPL weight function have significant influence on natural frequency, critical load and critical temperature of the porous GPLRC cylindrical nanoshell. The results of the current study are useful suggestions for design of nanoactuators and nanosensors.

Automated summary

This study investigates the buckling and vibrational characteristics of a porous composite cylindrical nanoshell reinforced with GPLs, considering the effects of porosity and GPLRC on natural frequency, critical axial load, and critical temperature. The material properties of piece-wise graphene-reinforced composites (GPLRC) are assumed to be graded in the thickness direction of a cylindrical nanoshell and estimated using a nanomechanical model. The results suggest that porosity, GPL distribution pattern, length scale parameter, number of layers, and GPL weight function significantly influence the natural frequency, critical load, and critical temperature of the porous GPLRC cylindrical nanoshell.