Numerous studies have proved the usefulness of surface patterning for themodification of tribological performances of sliding contacts. Here weinvestigate the effects of patterning on the tribological properties of aslider over a solid substrate. We show that, depending on the numerical densityof surface grooves, the tribological properties can change significantly. A lowdensity of surface patterning leads to a decrease of static friction force,while a higher density weakens this effect. The decrease is related to anon-uniform distribution of surface stress induced by patterning. We believethese findings and approach to be relevant for technological applications andrelated optimal design.
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