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A model for single asperity perturbation on lubricated sliding contact with DLC-coated solids

Abstract : In lubricated sliding contact systems with DLC coated solids, recent studies have shown that DLC coatings are highly sensitive to asperities breaking through the lubricant film within the contact area. Those asperities produce damages similar to those obtained from scratch tests, from where coating delamination can initiate and propagate. To better understand the link between scratches and coating delamination, endurance tests can then be performed on coating with controlled initial scratches. To ensure the scratches’ representativity with respect to the actual asperities’ contact condition, one has to estimate the load transmitted by such asperities as well as the induced perturbation on surface and subsurface stresses. In this paper, a simplified numerical model corresponding to such problems is presented. It is consistent with elasto-hydrodynamic (EHD) lubrication approximations and can be used on coated or uncoated systems. As a simplified model, it can be run quickly on multiple configurations, enabling the creation of representative scratch maps for the given lubricated contact conditions.
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https://hal-enpc.archives-ouvertes.fr/hal-01116216
Contributeur : Michael Peigney <>
Soumis le : jeudi 12 février 2015 - 17:43:02
Dernière modification le : vendredi 17 juillet 2020 - 17:09:10

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Geoffrey Pagnoux, Siegfried Fouvry, Michaël Peigney, Benoit Delattre, Guillaume Mermaz-Rollet. A model for single asperity perturbation on lubricated sliding contact with DLC-coated solids. Tribology International, Elsevier, 2015, 82, pp.423-430. ⟨10.1016/j.triboint.2014.05.009⟩. ⟨hal-01116216⟩

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