Influence de l'échelle de rugosité sur le frottement dnas les contacts lubrifiés

Ibrahim Demirci (1) , Sabeur Mezghani (1) , Mohammed Yousfi (1) , Hassan Zahouani (2) , Mohammed Elmansori (1)

1 MSMP - Mechanics surfaces and materials processing
2 LTDS - Laboratoire de Tribologie et Dynamique des Systèmes

The reduction of friction and the limitation of emissions of greenhouse gases are the main objectives of the automotive industry. This energy e ciency is related to functionalization of the surface of ringpack tribo-system. Multi-stage abrasive nishing process are commonly used to produce the geometrical properties of a surface. This confers technical some functionalities in the operating characteristics relating to their durability and reliability. The texture generated signi cantly a ects the performance of the ring-pack system. In this paper, a numerical model of elasto-hydrodynamic (EHD) contact coupled to a multiscale surface texture modeling was developed. This permtis to to study the scale e ect of surface features and theirs interactions on friction performance and lubricant ow under hydrodynamic lubrication condition. Surface topography can be decomposed in two principal components : super cial roughness modeled using fractal model and valleys modeled by scaling factor. Results show Relationship between friction and surface scales.

Mots clés: échelle de rugosité; texture de surface; frottement

Domaines: Ingénierie de l'environnement; Mécanique [physics.med-ph]

Ibrahim Demirci, Sabeur Mezghani, Mohammed Yousfi, Hassan Zahouani, Mohammed Elmansori. Influence de l'échelle de rugosité sur le frottement dnas les contacts lubrifiés. Congrès français de mécanique (21 ; 2013 ; Bordeaux (Gironde))., Oct 2013, France. pp.1-6. ⟨hal-00903678⟩