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Updated: Jun 28, 2026

Subject-specific Musculoskeletal Model for Studying Bone Strain During Dynamic Motion
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Subject-specific Musculoskeletal Model for Studying Bone Strain During Dynamic Motion

Published on: April 11, 2018

Friction and fracture.

E Gerde1, M Marder

  • 1Computational and Applied Mathematics and Center for Nonlinear Dynamics, The University of Texas at Austin, Austin, Texas 78712, USA.

Nature
|September 21, 2001
PubMed
Summary
This summary is machine-generated.

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This study reveals a new atomic-scale mechanism for static friction, explaining how self-healing cracks enable solids to slip according to Coulomb

Area of Science:

  • Physics
  • Materials Science
  • Tribology

Background:

  • Classical friction models (Amontons-Coulomb) relate sliding force to normal load, independent of contact area.
  • Existing explanations involve surface asperities and a real contact area proportional to the load.
  • Geophysical paradoxes regarding earthquake heat generation suggest the existence of self-healing cracks.

Purpose of the Study:

  • To present an alternative atomic-scale model for the static coefficient of friction.
  • To connect atomic-level surface interactions with macroscopic friction behavior.
  • To investigate the role of self-healing cracks in friction.

Main Methods:

  • Development of an atomic-scale description of contacting surfaces.
  • Application of multiscale analysis to model sliding phenomena.

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Last Updated: Jun 28, 2026

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Published on: April 11, 2018

Imaging of the Microstructural Failure Mechanism in the Human Hip
08:43

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  • Demonstration of self-healing crack formation and its implications for friction.

    • Main Results:

    • The study demonstrates the existence of self-healing cracks at the atomic scale.
    • These atomic-scale cracks lead to macroscopic solids that exhibit friction consistent with Coulomb's law.
    • A novel mechanism for static friction, rooted in atomic interactions, is presented.

    Conclusions:

    • The proposed friction mechanism, involving self-healing cracks, is expected to be relevant across multiple length scales.
    • The multiscale analysis approach bridges atomic and continuum descriptions of friction.
    • This work enables more accurate first-principles calculations of friction coefficients.