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On the viscous dissipation caused by randomly rough indenters in smooth sliding motion

  • The viscous dissipation between rigid, randomly rough indenters and linearly elastic counter bodies sliding past them is investigated using Green’s function molecular dynamics. The study encompasses a variety of models differing in the height spectra properties of the rigid indenter, in the viscoelasticity of the elastomer, and in their interaction. All systems reveal the expected damping linear in sliding velocity v at small v and a pronounced maximum at intermediate v. Persson’s theory of rubber friction, which is adopted to the studied model systems, reflects all observed trends. However, close quantitative agreement is only found up to intermediate sliding velocities. Relative errors in the friction force become significant once the contact area is substantially reduced by sliding.

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Document Type:Article
Author:Sergey SukhomlinovORCiD, Martin MüserORCiD
Parent Title (English):Applied Surface Science Advances
First Page:100182
Year of first Publication:2021
Release Date:2022/08/22
Tag:Green's function molecular dynamics; Rubber friction; Theory; Viscoelasticity
Impact:07.392 (2021)
Funding Information:DFG grant MU 1694/5-2
Funktionelle Mikrostrukturen
DDC classes:500 Naturwissenschaften und Mathematik / 540 Chemie
Open Access:Open Access
Signature:INM 2021/130
Licence (German):License LogoCreative Commons - CC BY-NC-ND - Namensnennung - Nicht kommerziell - Keine Bearbeitungen 4.0 International