Rough contact mechanics for viscoelastic graded materials: The role of small-scale wavelengths on rubber friction. (15th October 2017)

• Record Type: Journal Article
• Authors: Scaraggi, Michele; Comingio, Davide
• Is Part Of: International journal of solids and structures. Volume 125(2017)
• Page Start: 276
• Page End: 296
• Publication Date: 2017-10-15
• Subjects: Bufler's approach -- Coating -- FGM -- Graded viscoelasticity -- Multilayered -- Rough contact mechanics -- Roughness -- Rubber friction -- Sliding friction -- Wear modified surface layer; Mechanics, Applied -- Periodicals; Structural analysis (Engineering) -- Periodicals; Elastic solids -- Periodicals; Mécanique appliquée -- Périodiques; Constructions, Théorie des -- Périodiques; Solides élastiques -- Périodiques; Elastic solids; Mechanics, Applied; Structural analysis (Engineering); Periodicals; 624.18
• DOI: 10.1016/j.ijsolstr.2017.06.008
• Languages: English
• ISSNs: 0020-7683

Abstract

Abstract: We discuss on the rough contact mechanics in presence of a graded viscoelastic solid. In particular, we derive the effective surface admittance of a stepwise or continuously-graded half-space, which is then embedded in a Fourier-based residuals molecular dynamics formulation of the contact mechanics. The viscoelastic multilayer theory, which is of general applicability, is then applied to discuss on the role of small-scale wavelengths on polymer friction and contact area. We demonstrate that the rough contact mechanics exhibits effective interface properties which converge to asymptotes upon increase of the small-scale roughness content, when a more realistic rheology of the confinement is taken into account.