Statistical analysis of asperities on a rough surface

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].…”

“…Hence the idea of F. Robbe-Valloire's to adopt a description of random microgeometry using ISO 12085 standard parameters [17]. 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].…”

Few problems with regularized Coulomb law

“…From an experimental and numerical point of view Gonzalez-Valadez and Medina [17][18][19] have obtained that the ratio between the two stiffnesses is comprised between 0.5 to 0.7. From a practical point of view, the normal stiffness could be determined with the Greenwood-Williamson model and the physical and geometrical characteristics could be deduced from the roughness measurements and the relationships proposed by Robbe-Valloire [20]. In microslip regime, the equivalent behavior of the interface is summarized in Figure 2.…”