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  A Simple Mechanistic Model for Friction of Rough Partially Lubricated Surfaces

Costagliola, G., Brink, T., Richard, J., Leppin, C., Despois, A., & Molinari, J.-F. (2021). A Simple Mechanistic Model for Friction of Rough Partially Lubricated Surfaces. Tribology Letters, 69(3): 93. doi:10.1007/s11249-021-01467-1.

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A Simple Mechanistic Model for Friction of Rough Partially Lubricated Surfaces - Costagliola2021_Article_ASimpleMechanisticModelForFric.pdf (Publisher version), 3MB
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A Simple Mechanistic Model for Friction of Rough Partially Lubricated Surfaces - Costagliola2021_Article_ASimpleMechanisticModelForFric.pdf
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 Creators:
Costagliola, Gianluca1, Author           
Brink, Tobias2, 3, Author           
Richard, Julie4, Author           
Leppin, Christian4, Author           
Despois, Aude4, Author           
Molinari, Jean-François3, Author           
Affiliations:
1Civil Engineering Institute, Materials Science and Engineering Institute, École Polytechnique Fédérale de Lausanne - EPFL, 1015 Lausanne, Switzerland, ou_persistent22              
2Atomistic Modelling of Material Interfaces, Project Groups, Structure and Nano-/ Micromechanics of Materials, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_3291845              
3Civil Engineering Institute, Materials Science and Engineering Institute, École Polytechnique Fédérale de Lausanne - EPFL, 1015, Lausanne, Switzerland, ou_persistent22              
4Novelis R&T Centre Sierre, Rte des Laminoirs 15, 3960, Sierre, Switzerland, ou_persistent22              

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Free keywords: Aluminum alloys; Aluminum coated steel; Boundary element method; Lubrication; Sailing vessels; Topography, Direct measurement; Dynamic friction coefficient; Lubricated surfaces; Macroscopic friction; Mechanistic modeling; Quantitative prediction; Random deposition; Real contact area, Friction
 Abstract: We report experimental measurements of friction between an aluminum alloy sliding over steel with various lubricant densities. Using the topography scans of the surfaces as input, we calculate the real contact area using the boundary element method and the dynamic friction coefficient by means of a simple mechanistic model. Partial lubrication of the surfaces is accounted for by a random deposition model of oil droplets. Our approach reproduces the qualitative trends of a decrease of the macroscopic friction coefficient with applied pressure, due to a larger fraction of the micro-contacts being lubricated for larger loads. This approach relates direct measurements of surface topography to realistic distributions of lubricant, suggesting possible model extensions towards quantitative predictions. © 2021, The Author(s).

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 Dates: 2021
 Publication Status: Issued
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 Identifiers: DOI: 10.1007/s11249-021-01467-1
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Title: Tribology Letters
Source Genre: Journal
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Publ. Info: Springer
Pages: - Volume / Issue: 69 (3) Sequence Number: 93 Start / End Page: - Identifier: ISSN: 10238883