Reversible plastic events in amorphous materials

Micah Lundberg, Kapilanjan Krishan, Ning Xu, Corey S. O’Hern, and Michael Dennin
Phys. Rev. E 77, 041505 – Published 15 April 2008
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Abstract

For crystalline materials, the microscopic origin of plasticity is well understood in terms of the dynamics of topological defects. For amorphous materials, the underlying structural disorder prevents such a description. Therefore identifying and characterizing the microscopic plastic events in amorphous materials remains an important challenge. We show direct evidence for the coexistence of reversible and irreversible plastic events (T1 events) at the microscopic scale in both experiments and simulations of two-dimensional foam. In the simulations, we also demonstrate a link between the reversibility of T1 events and pathways in the potential energy landscape of the system.

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  • Received 13 September 2007

DOI:https://doi.org/10.1103/PhysRevE.77.041505

©2008 American Physical Society

Authors & Affiliations

Micah Lundberg1, Kapilanjan Krishan1, Ning Xu2,3, Corey S. O’Hern4,5, and Michael Dennin1

  • 1Department of Physics and Astronomy, University of California at Irvine, Irvine, California 92697-4575, USA
  • 2Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6396, USA
  • 3James Franck Institute, The University of Chicago, Chicago, Illinois 60637, USA
  • 4Department of Mechanical Engineering, Yale University, New Haven, Connecticut 06520-8286, USA
  • 5Department of Physics, Yale University, New Haven, Connecticut 06520-8120, USA

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Issue

Vol. 77, Iss. 4 — April 2008

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