Refinement of the model for iron oxide friction based on movable cellular automata

This work is devoted to the refinement of the previously developed numerical models of the frictional contact of composites based on iron oxide. The most important point is taking into account the plastic properties of iron oxide, which were determined from the experimental data on its constrained compression from the literature. To adjust them, we simulated the penetration of a Vickers indenter into an iron oxide specimen and compared the obtained load-displacement curve with the experimental data from other experiments. The second refinement of the proposed model consists of using the full three-dimensional geometry instead of the plane stress approximation. Periodic boundary conditions are still used in the sliding direction; however, the three-dimensionality of the problem makes it possible to more accurately take into account the size of inclusions and the formed dynamic inhomogeneities in the friction layer. The third refinement of the model is taking into account the heat release during friction due to plastic deformation, as well as the effects of thermal expansion and thermal conductivity.