Molecular dynamics simulation on bending behaviour of metal nanorod
金属纳米棒弯曲力学行为的分子动力学模拟

The mechanical behaviour of nanostructure is the basis of nanodevice design, and molecular dynamics method is a valid method for investigating this behaviour. Bending behaviour of Cu nanorod is simulated by the embedded atom method. The simulation results show that the mechanical behaviour in nanoscale is very different from that in macroscale. This difference results from the size effect and surface effect. The bending procedure of a metal nanorod consists of three steps: initial deformation delay, line elastic deformation, plastic deformation. In the plastic stage, there appear some characteristic behaviours such as rigidity reinforcement, step up, and considerable ductility to be seen.