Buckling Resistance of Sandwich Cylindrical Shell with Porosity-Dependent GPLRC Core and Metallic Face Sheets

Owing to the exceptional qualities of nanocomposite materials and the vast array of applications for porous lightweight structures, combining them results in structures that are both rigid and lightweight. Therefore, this work examines the buckling resistance of a porous cylindrical shell with graphene platelets reinforced composite (GPLRC) that is supported by a Pasternak substrate that can withstand normal and shear stresses and is sandwiched between two metal face sheets. Based on predetermined functionality, the configuration of the pores and the distribution of GPLs within the core are examined. The effective mechanical properties of the core of the shell are obtained by incorporating the Gaussian random field model for closed cellular solids with micromechanical models like Halpin-Tsai and the extended rule of mixture. An analytical method designed for shells with simply supported edges is used to generate critical buckling loads using equilibrium equations derived from a higher-order shear deformation theory. The study thoroughly evaluates how different factors affect the outcomes. The results showed that the largest values of critical buckling loads were obtained from the symmetric pattern of pore distribution, which outperformed the uniform and non-symmetric patterns. Critical buckling stresses also increased as the weight fraction of GPLs increased. The results have practical implications for sectors using cylindrical shells and could be used as a standard for similar studies in the future.