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Molecular Dynamics Study on Friction Due to Ploughing and Adhesion in Nanometric Scratching Process

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Abstract

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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Acknowledgments

We gratefully acknowledge financial support from the National Natural Science Foundation of China (Grant nos. 50730007 and 50721004) and the State Key Development Program for Basic Research of China (Grant no. 2009CB724200).

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Authors and Affiliations

  1. State Key Laboratory of Tribology, Tsinghua University, Chengfu Road, Beijing, 100084, People’s Republic of China

    Peng-zhe Zhu, Yuan-zhong Hu, Tian-bao Ma & Hui Wang

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  1. Peng-zhe Zhu
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  2. Yuan-zhong Hu
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  3. Tian-bao Ma
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  4. Hui Wang
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Correspondence to Yuan-zhong Hu.

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Zhu, Pz., Hu, Yz., Ma, Tb. et al. Molecular Dynamics Study on Friction Due to Ploughing and Adhesion in Nanometric Scratching Process. Tribol Lett 41, 41–46 (2011). https://doi.org/10.1007/s11249-010-9681-6

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  • DOI: https://doi.org/10.1007/s11249-010-9681-6

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