Modeling of contact between rough surfaces using homogenisation technique

Abstract

In this study, microscopic deterministic and analytical contact models that take the properties of engineering surfaces into account have been developed. Geometrical characteristics of rough surfaces are deduced using the standard procedure for roughness and waviness parameters. These models allow the analyses of the asperities behaviour and real contact area. Comparison between the analytical and deterministic results shows a good correlation. The microscopic model is often enabling to simulate the real structure with complex geometry, so, a homogenisation technique has been developed. The interface of the equivalent model has been governed by the microscopic model results. Sensitivity of models responses to the random pulling of surfaces parameters has been also analysed.

Numerical Modeling of Rough Contact between Two Cylinders with Axes Parallel

“…The contact between two rough cylindrical surfaces is reproduced faithfully. These results led to validate the construction of sum cylindrical surface with the same approach used in the case of flat surfaces [16][17][18][19][20]. It is possible to ensure a perfect equivalence between the results of the two configuration of contact.…”

“…This relation has been used by F. Robbe Valloire [18][19][20] based on the concept of so-called motif [17] defined as that part of profile bound between two peaks (see Fig. 4).…”

“…This work aims to construct an equivalent sum surface from two cylindrical rough surfaces in order to compare the results of rough-rough contact and sum surface-rigid smooth contact with random surfaces for the same load. Our study will be limited to use the same micro geometrical assumptions and mechanical as that used for the calculation between two rough flat surfaces [18,20].…”

“…With this method, signal processing is obtained by a graphic technique and use the motif concept defined as a part of profile which lies between two significant peaks [18][19]. Belghith and coworkers developed a new method for modeling rough contact between two flats surfaces using homogenization technique [20]. They used microgeometrical characterization of rough surfaces given by F. Robbe-Valloire.…”

In-situ Observations of a Multi-Asperity Real Contact Area on a Submicron Scale

“…Based on geometric characterization of contacting surfaces contact models can be divided into four groups, i.e., statistical [9] to [11], fractal [12] and [13], multi-scale [14] to [16] and deterministic [17] to [19]. While statistical models are the most widely used because of their simple adoption and good approximation to actual engineering surfaces, they are not a very powerful tool for a detailed contact analysis since the surface properties are determined with statistical functions.…”