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Akarapu S, Sharp T, Robbins MO. Stiffness of contacts between rough surfaces. Phys Rev Lett. 2011;106(20):204301doi: 10.1103/PhysRevLett.106.204301.
Akarapu, S., Sharp, T., & Robbins, M. O. (2011). Stiffness of contacts between rough surfaces. Physical review letters, 106(20), 204301. https://doi.org/10.1103/PhysRevLett.106.204301
Akarapu, Sreekanth, et al. "Stiffness of contacts between rough surfaces." Physical review letters vol. 106,20 (2011): 204301. doi: https://doi.org/10.1103/PhysRevLett.106.204301
Akarapu S, Sharp T, Robbins MO. Stiffness of contacts between rough surfaces. Phys Rev Lett. 2011 May 20;106(20):204301. doi: 10.1103/PhysRevLett.106.204301. Epub 2011 May 20. PMID: 21668231.
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Phys Rev Lett. 2011 May 20;106(20):204301. doi: 10.1103/PhysRevLett.106.204301. Epub 2011 May 20.

Stiffness of contacts between rough surfaces.

Physical review letters

Sreekanth Akarapu, Tristan Sharp, Mark O Robbins

Affiliations

  1. Department of Physics and Astronomy, Johns Hopkins University, 3400 N Charles Street, Baltimore, Maryland 21218, USA.

PMID: 21668231 DOI: 10.1103/PhysRevLett.106.204301

Abstract

The effect of self-affine roughness on solid contact is examined with molecular dynamics and continuum calculations. The contact area and normal stiffness rise linearly with the applied load, and the load rises exponentially with decreasing separation between surfaces. Results for a wide range of roughness, system size, and Poisson ratio can be collapsed using Persson's contact theory for continuous elastic media. The compliance due to atomic-scale motion at the interface between solids has little effect on the area and normal stiffness, but can reduce the total transverse stiffness by orders of magnitude. The scaling of this effect with system size is discussed.

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