A numerical model is presented for computing the static friction coefficient of rough surfaces with a soft thin film. In the calculation, an improved model, based on that due to Derjaguin et al., is used in conjunction with an elastic-plastic contact model for contact with a soft coating. The effects of the film thickness and surface roughness on the static friction coefficient and contact are investigated. The numerical results reflect published experimental observations and show the static friction coefficient depends strongly on surface film thickness, external force and surface roughness. The static friction coefficient (μ) increases with the surface film thickness when the plasticity index whilst μ increases with decreasing film thickness in the very thin film regime when and For real rough surfaces, contact and friction behavior is probably heavily influenced by the existence of such soft, thin surface films, which increase the contact area due to plastic deformation of the film and the contact stiffness of the surface in the case of thin film and light load.
Static Friction Modeling in the Presence of Soft Thin Metallic Films
Contributed by the Tribology Division for publication in the ASME JOURNAL OF TRIBOLOGY. Manuscript received by the Tribology Division July 13, 2000; revised manuscript received January 31, 2001. Associate Editor: G. G. Adams.
- Views Icon Views
- Share Icon Share
- Search Site
Liu , Z., Neville , A., and Reuben, R. L. (January 31, 2001). "Static Friction Modeling in the Presence of Soft Thin Metallic Films ." ASME. J. Tribol. January 2002; 124(1): 27–35. https://doi.org/10.1115/1.1395628
Download citation file: