▎ 摘　　要

This paper investigates the nonlinear low-velocity impact response of geometrically imperfect graphene platelets-reinforced metal foams (GPLRMF) cylindrical shells under axial motion. Based on Love's thin shell theory and von Karman's geometric nonlinearity, the nonlinear equations of motion for the GPLRMF cylindrical shells are established. Then, combined with the Galerkin method, the fourth-order Runge-Kutta technique is adopted to simulate the time history curves of the GPLRMF cylindrical shells, in which the simply supported boundary condition is considered. Subsequently, the nonlinear impact force between the GPLRMF cylindrical shells and impactor is obtained by using Hertz contact force model and Newton's second law. In the end, numerical results are presented to investigate the effects of various parameters including foam distribution, graphene platelets (GPLs) distribution pattern, GPLs weight fraction, foam coefficient, axially moving velocity of the cylindrical shells, radius and initial velocity of the spherical impactor, pre-stressing force, damping coefficient and initial geometrical imperfection on the nonlinear low-impact response of the GPLRMF cylindrical shells.