Buckling and postbuckling of carbon nanotube-reinforced composite cylindrical panels subjected to axial compression in thermal environments

Abstract

This paper presents an analytical investigation on the buckling and postbuckling behavior of thin composite cylindrical panels reinforced by single walled carbon nanotubes (SWCNTs), exposed to thermal environments and subjected to uniform axial compression. Material properties of isotropic matrix phase and carbon nanotubes are assumed to be temperature dependent, and effective properties of carbon nanotube-reinforced composite (CNTRC) are functionally graded in the thickness direction and estimated by extended rule of mixture. Governing equations are based on the classical thin shell theory taking von Karman-Donnell nonlinearity and initial geometrical imperfection into consideration. Approximate solutions are assumed to satisfy simply supported boundary conditions and Galerkin procedure is applied to derive explicit expressions of buckling loads and load-deflection relation. Effects of volume fraction and distribution type of carbon nanotubes, geometrical parameters, elevated temperature and initial imperfection on the nonlinear stability of CNTRC cylindrical panels are analyzed and discussed. The novelty of the present study is that closed-form results of buckling load and nonlinear loaddeflection relation can be readily used to analyze the buckling and postbuckling behaviors of axially loaded CNTRC cylindrical panels.

Thermal postbuckling analysis of FG-CNTRC doubly curved panels with elastically restrained edges using Reddy's higher order shear deformation theory

“…From Eqs. (6) and 10, the expressions of u ,x and v ,y can be obtained. Afterwards, substituting the solutions (18) into the u ,x and v ,y and placing the received expressions into Eq.…”

“…Shen [5] studied the postbuckling of FG-CNTRC cylindrical panels under external pressure in thermal environments. Analytical investigations on thin and shear deformable FG-CNTRC cylindrical panels subjected to mechanical and thermomechanical loads are performed by Trang and Tung [6][7][8]. Postbuckling behavior of FG-CNTRC cylindrical shells subjected to axial compression and external pressure in thermal environments are analyzed by Shen [9,10] employing higher order shear deformation theory (HSDT) and asymptotic solutions.…”

Buckling and postbuckling of CNT-reinforced composite sandwich cylindrical panels subjected to axial compression in thermal environments

“…As an extension of previous works on thin CNTRC cylindrical panel and shell [36,37], this paper presents an analytical study on the buckling and postbuckling behavior of shear deformable CNTRC sandwich cylindrical panels subjected to uniform axial compression in thermal environments. Two sandwich models corresponding to CNTRC face sheets and core layer are considered.…”