Journal
TRIBOLOGY LETTERS
Volume 41, Issue 1, Pages 41-46Publisher
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s11249-010-9681-6
Keywords
Molecular dynamics; Scratching; Ploughing friction; Adhesion friction
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Funding
- National Natural Science Foundation of China [50730007, 50721004]
- State Key Development Program for Basic Research of China [2009CB724200]
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In this study, three-dimensional MD simulations are carried out to study the nanometric scratching process. The ploughing friction coefficient and the adhesion friction coefficient are distinguished for the first time using MD simulations. The contribution of chip to friction coefficient is also evaluated. The simulation results show that the macroscale theory can qualitatively evaluate the ploughing friction coefficient, but it slightly overestimates the ploughing friction coefficient on the nanoscale for the scratching depths studied. It is found that the adhesion friction coefficient is independent of the scratching depth as predicted by macroscale theory. It is also found that the contribution of chip to friction coefficient is independent of the scratching depth and cannot be neglected on the nanoscale.
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