Driving Rate Dependence of Avalanche Statistics and Shapes at the Yielding Transition

Chen Liu, Ezequiel E. Ferrero, Francesco Puosi, Jean-Louis Barrat, and Kirsten Martens
Phys. Rev. Lett. 116, 065501 – Published 11 February 2016
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Abstract

We study stress time series caused by plastic avalanches in athermally sheared disordered materials. Using particle-based simulations and a mesoscopic elastoplastic model, we analyze system size and shear-rate dependence of the stress-drop duration and size distributions together with their average temporal shape. We find critical exponents different from mean-field predictions, and a clear asymmetry for individual avalanches. We probe scaling relations for the rate dependency of the dynamics and we report a crossover towards mean-field results for strong driving.

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  • Received 30 June 2015

DOI:https://doi.org/10.1103/PhysRevLett.116.065501

© 2016 American Physical Society

Physics Subject Headings (PhySH)

  1. Research Areas
  1. Physical Systems
Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Chen Liu1,2, Ezequiel E. Ferrero1,2, Francesco Puosi3,1,2, Jean-Louis Barrat1,2, and Kirsten Martens1,2

  • 1Université Grenoble Alpes, LIPHY, F-38000 Grenoble, France
  • 2CNRS, LIPHY, F-38000 Grenoble, France
  • 3Ecole Normale Supérieure de Lyon, Laboratoire de Physique CNRS, 46 allée d’Italie, 69364 Lyon Cedex 7, France

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Issue

Vol. 116, Iss. 6 — 12 February 2016

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