Journal article

Transitions between nanomechanical and continuum mechanical contacts: new insights from liquid structure.

Shu Jian Chen, Wei Qiang Chen, Yubing Ouyang, Stephan Matthai, Lihai Zhang

Nanoscale | Royal Society of Chemistry | Published : 2019

Abstract

The use of continuum mechanics to describe contacts involving nanoscale and atomic interactions has been one of the key controversies in nanoscience, tribology, and petrophysical and geological studies. By applying a novel nonequilibrium molecular dynamics scheme to wet quartz contacts, this study revealed the key transitions between continuum electrostatic, nanomechanical and Hertzian contact behaviors at around one nm of surface separation, which results in critical contact pressure fluctuations between -30 and 100 MPa. Using a novel liquid-structure analysis scheme based on the spatial distribution of water molecules, the nanomechanical behavior was found to originate from the collapse an..

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Grants

Awarded by State Key Program of the National Natural Science Foundation of China


Funding Acknowledgements

The authors are grateful for the financial support from the Australian Research Council and the State Key Program of the National Natural Science Foundation of China (Grant No. 51734009) in conducting this study