화학공학소재연구정보센터
Chemical Physics Letters, Vol.678, 1-4, 2017
Molecular origin of limiting shear stress of elastohydrodynamic lubrication oil film studied by molecular dynamics
All-atom molecular dynamics simulations of an elastohydrodynamic lubrication oil film are performed to study the effect of pressure. Fluid molecules of n-hexane are confined between two solid plates under a constant normal force of 0.1-8.0 GPa. Traction simulations are performed by applying relative sliding motion to the solid plates. A transition in the traction behavior is observed around 0.5-2.0 GPa, which corresponds to the viscoelastic region to the plastic-elastic region, which are experimentally observed. This phase transition is related to the suppression of the fluctuation in molecular motion. (C) 2017 Elsevier B.V. All rights reserved.