抄録
A Molecular dynamics simulation was carried out to clarify the influence of the atomic-scale stick-slip phenomenon on the energy dissipation and friction anisotropy. In the simulation, the sliding processes on an ideal Cu{100} surface by a carbon atom slider were examined by focusing on the two representative sliding directions, such as <100> and <110> using a model in which the cantilever effect of the atomic force microscope was taken into account. As a result, it is found that the dissipated mechanical energy thorough the atomic-scale stick-slip phenomenon can be calculated from the stored elastic energy using the amplitudes of stick-slip force signals. It is also found that the friction coefficient in the sliding in <100> direction becomes higher than that in <110> direction due to the remarkable two-dimensional stick-slip phenomenon.
