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Multiscale Modeling of Two Dimensional Rough Surface Contacts

Published online by Cambridge University Press:  01 February 2011

Binquan Luan
Affiliation:
Department of Physics and Astronomy, The Johns Hopkins University, 3400 N. Charles Street, Baltimore, MD 21218, U.S.A.
Sangil Hyun
Affiliation:
Department of Physics and Astronomy, The Johns Hopkins University, 3400 N. Charles Street, Baltimore, MD 21218, U.S.A.
Mark O. Robbins
Affiliation:
Department of Physics and Astronomy, The Johns Hopkins University, 3400 N. Charles Street, Baltimore, MD 21218, U.S.A.
Noam Bernstein
Affiliation:
Naval Research Laboratory, Washington, DC 20375, U.S.A.
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Abstract

A hybrid simulation method is used to study non-adhesive contact between two-dimensional self-affine rough surfaces. We find strong scale dependence as the contact dimensions decrease to the atomic scale. Both purely elastic and plastic materials are considered, and show different trends with system size. In all cases the contact area rises linearly with applied load, but the slope is substantially different from continuum predictions. We also examine the effect of commensurability between contacting surfaces. Contact area and frictional forces can be very different for commensurate and incommensurate surfaces, particularly for plastic materials.

Type
Research Article
Copyright
Copyright © Materials Research Society 2005

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References

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