The effect of autocorrelation length on the real area of contact and friction behavior of rough surfaces | Zendy

Yilei Zhang | Zendy; Sriram Sundararajan | Zendy

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The effect of autocorrelation length on the real area of contact and friction behavior of rough surfaces

Author(s) -

Yilei Zhang,

Sriram Sundararajan

Publication year - 2005

Publication title -

journal of applied physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.699

H-Index - 319

eISSN - 1089-7550

pISSN - 0021-8979

DOI - 10.1063/1.1914947

Subject(s) - surface roughness , autocorrelation , contact area , surface finish , microscale chemistry , materials science , surface (topology) , root mean square , amplitude , contact mechanics , rough surface , mechanics , composite material , optics , mathematics , geometry , physics , thermodynamics , statistics , finite element method , mathematics education , quantum mechanics

Autocorrelation length (ACL) is a surface roughness parameter that provides spatial information of surface topography that is not included in amplitude parameters such as root-mean-square roughness. This paper presents a relationship between ACL and the friction behavior of a rough surface. The influence of ACL on the peak distribution of a profile is studied based on Whitehouse and Archard’s classical analysis [Whitehouse and ArchardProc. R. Soc. London, Ser. A 316, 97 (1970)] and their results are extended to compare profiles from different surfaces. The probability density function of peaks and the mean peak height of a profile are given as functions of its ACL. These results are used to estimate the number of contact points when a rough surface comes into contact with a flat surface, and it is shown that the larger the ACL of the rough surface, the less the number of contact points. Based on Hertzian contact mechanics, it is shown that the real area of contact increases with increasing of number of co...

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