Nonlinear low-velocity impact response of GPLRMF doubly curved shells in thermal environment

This article takes the doubly curved shell as research object, the material properties of graphene platelets reinforced metal foam (GPLRMF) are temperature-dependent, the dynamic model is built by using Newton's second law to study the low-velocity impact of imperfect GPLRMF doubly curved shells. The partial differential equations are obtained by Euler-Lagrange principle and dispersed by using Galerkin method. Subsequently, the effects of various parameters (including temperature, porosity coefficient, damping, prestress, initial geometric imperfections, etc.) are discussed in sequence. The results indicate that the contact force, contact time and central displacement of GPLRMF doubly curved shells during the impact process are closely related to the above parameters, and an increase in temperature and geometric imperfections will simultaneously increase the contact force and central displacement. By analyzing the low-velocity impact performance of GPLRMF doubly curved shells, an effective analysis method is provided for the design and practical engineering applications of GPLRMF material structures.