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Molecular Simulation Study on the Influence of the Scratching Velocity on Nanoscopic Contact Processes

Authors Sebastian Schmitt, Simon Stephan, Benjamin Kirsch, Jan C. Aurich, Eberhard Kerscher, Herbert M. Urbassek, Hans Hasse

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Author Details

Sebastian Schmitt
  • Laboratory of Engineering Thermodynamics (LTD), TU Kaiserslautern, Germany
Simon Stephan
  • Laboratory of Engineering Thermodynamics (LTD), TU Kaiserslautern, Germany
Benjamin Kirsch
  • Institute for Manufacturing Technology and Production Systems (FBK), TU Kaiserslautern, Germany
Jan C. Aurich
  • Institute for Manufacturing Technology and Production Systems (FBK), TU Kaiserslautern, Germany
Eberhard Kerscher
  • Materials Testing (AWP), TU Kaiserslautern, Germany
Herbert M. Urbassek
  • Physics Department and Research Center OPTIMAS, TU Kaiserslautern, Germany
Hans Hasse
  • Laboratory of Engineering Thermodynamics (LTD), TU Kaiserslautern, Germany

Funding

The authors gratefully acknowledge financial support by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) – 252408385 – IRTG 2057.

Acknowledgements

The present work was conducted under the auspices of the Boltzmann-Zuse Society of Computational Molecular Engineering (BZS). The simulations were carried out on the Regional University Computing Center Kaiserslautern (RHRK) under the grant TUK-MTD, the High Performance Computing Center Stuttgart (HLRS) under the grant MMHBF2 as well as the Leibniz Supercomputing Centre (LRZ) under the grant (AMSEL)^2 (pn56mo).

Cite AsGet BibTex

Sebastian Schmitt, Simon Stephan, Benjamin Kirsch, Jan C. Aurich, Eberhard Kerscher, Herbert M. Urbassek, and Hans Hasse. Molecular Simulation Study on the Influence of the Scratching Velocity on Nanoscopic Contact Processes. In 2nd International Conference of the DFG International Research Training Group 2057 – Physical Modeling for Virtual Manufacturing (iPMVM 2020). Open Access Series in Informatics (OASIcs), Volume 89, pp. 17:1-17:16, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2021)
https://doi.org/10.4230/OASIcs.iPMVM.2020.17

Abstract

The influence of the scratching velocity on mechanical and thermal properties of a nanoscopic contact process was studied by molecular dynamics simulations. Simulations with different scratching velocities were conducted in dry and lubricated systems. The contact process consisted of a lateral scratching of a spherical indenter on a planar substrate. All molecular interactions were described by the Lennard-Jones truncated and shifted potential. The forces on the indenter, the coefficient of friction and the work done by the indenter as well as the power applied on the indenter were sampled. Furthermore, an analysis of thermal properties was conducted: The change of the energy of the substrate, the indenter and the fluid was evaluated and the local temperature field was determined. The forces, the coefficient of friction and the work done by the indenter show practically no influence of the scratching velocity. The work done by the indenter was found to be the same for all velocities. As a consequence, the power supplied to the system depends linearly on the scratching velocity, which affects the temperature of the contact zone. As expected, the presence of a lubricant reduces the temperature of the substrate in the vicinity of the contact.

Subject Classification

ACM Subject Classification
  • Applied computing → Physical sciences and engineering
Keywords
  • Nanotribology
  • Friction
  • Scratching
  • Lubrication
  • Lennard-Jones Potential

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