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Multiscale Modeling of Two Dimensional Rough Surface Contacts

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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.

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Acknowledgments

We thank J. F. Molinari and J. A. Harrison for helpful discussions. This material is based upon work supported by the National Science Foundation under Grant No.CMS-0103408.

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Authors and Affiliations

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

    Binquan Luan, Sangil Hyun, Mark O. Robbins & Noam Bernstein

  2. Naval Research Laboratory, Washington, DC, 20375, USA

    Noam Bernstein

Authors
  1. Binquan Luan
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  2. Sangil Hyun
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  3. Mark O. Robbins
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  4. Noam Bernstein
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Luan, B., Hyun, S., Robbins, M.O. et al. Multiscale Modeling of Two Dimensional Rough Surface Contacts. MRS Online Proceedings Library 841, R7.4 (2004). https://doi.org/10.1557/PROC-841-R7.4

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  • DOI: https://doi.org/10.1557/PROC-841-R7.4

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