Surface Roughness and Material Strength of Tribo-Pairs in Ring Compression Tests

Valentino Anok Melo; Pedro A.R. Rosa; P.A.F. Martins

Informações chave

Autores:

Valentino Anok Melo (Valentino Anok Melo Cristino); Pedro A.R. Rosa (Pedro Alexandre Rodrigues Carvalho Rosa); P.A.F. Martins (Paulo António Firme Martins)

Publicado em

Fevereiro 2011

Resumo

The quantification of friction by means of simple models such as AmontonCoulombs and the law of constant friction is questionable because the influence of surface roughness and material strength, among other factors, is not considered. This paper 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 AmontonCoulombs law. The presentation is supported by thoroughly researched quantitative data obtained from experimentation and finite element modelling of the ring compression test.