Non-smooth numerical solution for Coulomb friction and rolling resistance

ELIANA SELEN SANCHEZ; ALEJANDRO COSIMO; ALBERTO CARDONA; OLIVIER BRULS

Budapest

Congreso; ECCOMAS; 2021

Budapest University of Technology and Economics

Friction and inertia loads play a relevant role in the operative performance of a mechanical system. For instance, in ball bearings, a correct formulation that properly describes the rolling dynamic motion requires to understand the influence of contact and frictional forces in order to accurately capture the slip, the rotation motion and the instant where the slip motion goes to pure rolling or viceversa. Friction effects in sphere bodies can be classified in three parts: i) sliding f riction, where a set-valued force law with two degrees of freedom generates a resistive force to slide; ii) rolling f riction, where two raslational degrees of freedom are required in the formulations; it is a set-valued force law that generates a resistive moment to rolling and iii) drilling f riction or Coulomb-Contensou friction is a set-valued force law that generates a resistive moment to the normal relative spin of the bodies, thus only one rotational degree of freedom is required.