On the interface stresses and local-slip evolution in the frictional contact between rigid cylinder and single-crystal copper

Key Points

• This research aims to analyze the contact stress and deformation in the frictional interaction between a rigid cylinder and single-crystal copper.
• Utilized molecular dynamics simulations to study friction between a rigid cylinder and single-crystal copper.
• Examined both pure normal loading and the combined effects of pressure and shear.
• Analyzed the displacement and stress distribution at the contact interface.
• Identified two areas at the contact interface: an adhesion zone without slip and a slip zone with significant tangential displacement.
• Coulomb's friction law was found to be inapplicable in the slip zone, with a linear decay of shear stress relative to contact pressure.
• Observed that as tangential load increased, the initial peak contact pressure decreased and shifted, while new peak values emerged near the sliding edge.