Surface roughness and material strength of tribo-pairs in ring compression tests

The quantification of friction by means of simple models such as Amonton–Coulomb’s and the law of constant friction is questionable because the influence of surface roughness and material strength, among other factors, is not considered. aper provides a comprehensive analysis on the influence of surface roughness and material strength in friction and proposes a new operator based on a sigmoid function to incorporate the combined influence of both phenomena in a modified version of the Amonton–Coulomb’s law. esentation is supported by thoroughly researched quantitative data obtained from experimentation and finite element modelling of the ring compression test.