A Simple Mechanistic Model for Friction of Rough Partially Lubricated Surfaces

被引:0
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作者
Gianluca Costagliola
Tobias Brink
Julie Richard
Christian Leppin
Aude Despois
Jean-François Molinari
机构
[1] École Polytechnique Fédérale de Lausanne - EPFL,Civil Engineering Institute, Materials Science and Engineering Institute
[2] Max-Planck-Institut für Eisenforschung GmbH,undefined
[3] Novelis R&T Centre Sierre,undefined
来源
Tribology Letters | 2021年 / 69卷
关键词
Mixed lubrication; Boundary element method; Surface roughness; Strip drawing friction test;
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摘要
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.
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