▎ 摘　　要

Molecular dynamics (MD) simulations were carried out to study the nanoindentation mechanical properties of graphene/nickel system. The effects of indenter radius, loading speed, and number of graphene layers were investigated. The results show that the indentation response of graphene/nickel system includes elastic regime, plastic regime and graphene ruptures regime. The contact stiffness, elastic capacity and the load bearing capacity are visibly improved by graphene coverage. The indenter radius significantly influences the ultimate indentation depth and corresponding forces. The increasing number of graphene layers significantly enhances the elastic capacity and the ultimate forces of graphene/nickel system. (C) 2017 Elsevier B.V. All rights reserved.