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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.

Effect of Surface Grooves on the Static Friction of an Elastic Slider