Boundary Friction for a Line Contact Model: An Empirical Approach

Abstract:

The paper introduces an alternative approach to predict boundary friction for rough surfaces at micros-scale through the empirical integration of asperity-like nanoscale friction measurements. The nanoscale friction is measured using an atomic force microscope (AFM) tip sliding on a steel plate, confining the test lubricant, i.e. base oil for the fully formulated SAE grade 10w40. The approach, based on the Greenwood and Tripp’s friction model, is combined with the modified Elrod’s cavitation algorithm in order to predict the friction generated by a slider-bearing test rig. The numerical simulation results, using an improved boundary friction model, showed good agreement with the measured friction data.

• Periodical: Key Engineering Materials (Volume 642)
• Pages: 8-12
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.642.8
• Online since: April 2015
• Authors: William W.F. Chong*, Miguel de La Cruz
• Keywords: Asperity Interaction, Atomic Force Microscopy, Boundary Lubrication, Elastoplasticity, Elrod Cavitation Algorithm

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