境界潤滑状態における油膜生成と剥離の粗視化分子動力学解析

抄録

In the boundary lubrication, where both fluid lubrication and solid contact states coexist, the formation and delamination of lubricant layers on the solid surface are expected to occur alternately. This study aims to reveal the nanometer scale mechanisms of lubricant layer formation and delamination by means of coarse-grained molecular dynamics simulation. Our calculations demonstrated time-dependent transition from the slip between lubricant layers to the stick-slip at the lubricant/solid interface and vice versa. Time needed for the transition differed depending on the separation between the opposing solid surfaces, between which lubricant molecules were filled. It was also shown that the delamination of lubricant layers on the solid surface was suppressed by the presence of solid surface asperity.