Impact dynamics of graphene nanosheets in collision with metallic nanoparticles

Abstract. In this paper, impact of metallic nanoparticles on graphene sheets was investigated via Non-Equilibrium Molecular Dynamics (NEMD) approach. Considering the unique feature of graphene to absorb motion energy of the materials impacting on it, systems based on graphene can be appropriate solutions for the purpose of damping. The proposed model was validated by available experimental data and simulation. It is demonstrated that mechanics of impact are not multidimensional problems; therefore, they can be studied by molecular dynamics. Eects of velocity of the particles, impact angle, and number of the graphene sheets on the normal coecient of restitution of the metallic nanoparticles were researched. Contrarily to macro systems, it was observed that by increasing the velocity of impact, normal coecient of restitution decreased. Also, the normal coecient of restitution increased by increasing impact angle. By increasing the graphene sheets, the coecient was reduced signicantly. Negative normal coecient of restitution was observed for some cases, which was also reported in other works on nanostructures. It is shown that a single graphene layer can withstand impacting 3.64 times a 20-layer graphene sheet.