A model of the adhesive component of the sliding friction force

The adhesive contact problem is stated and solved for two axisymmetric elastic asperities of different shape. The energy dissipation in an approach-separation cycle is calculated and analyzed. A model is suggested to determine the adhesive component of the sliding friction force based on calculating the energy dissipation in formation and breaking of contacts between asperities in sliding of rough surfaces. The friction force is calculated and analyzed for various roughness parameters and values of the surface energy.

Research highlights
► Energy is dissipated in approach-separation of two asperities.
► Energy loss due to adhesion is calculated.
► Friction is modelled based on energy losses for elementary contacts.
► Friction as a combined effect of roughness and adhesion.