The Influence of GPL Reinforcements on the Post-Buckling Behavior of FG Porous Rings Subjected to an External Pressure

The work focuses on the post- buckling behavior of functionally graded graphene platelet (FG-GPL)-reinforced porous thick rings with open-cell internal cavities under a uniform external pressure. generalized rule mixture and modified Halpin–Tsai model are here used to evaluate effective mechanical properties ring. Three types porosity patterns assumed together five different GPL distributions as reinforcement across ring thickness. theoretical formulation relies 2D-plane stress linear elasticity theory Green strain field in conjunction virtual principle derive nonlinear governing equations post-buckling problem. Unlike simple models, 2D considers thickness stretching. finite element combined an iterative Newton–Raphson algorithm is obtain path up collapse. A systematic investigation evaluates effect weight fraction nanofillers, coefficient porosity, distribution, GPLs distribution deep Based results, it found that value strength increase considerably (by approximately 80%) by increasing nanofiller about 1%.