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Budrikis Z, Castellanos DF, Sandfeld S, et al. Universal features of amorphous plasticity. Nat Commun. 2017;8:15928doi: 10.1038/ncomms15928.
Budrikis, Z., Castellanos, D. F., Sandfeld, S., Zaiser, M., & Zapperi, S. (2017). Universal features of amorphous plasticity. Nature communications, 815928. https://doi.org/10.1038/ncomms15928
Budrikis, Zoe, et al. "Universal features of amorphous plasticity." Nature communications vol. 8 (2017): 15928. doi: https://doi.org/10.1038/ncomms15928
Budrikis Z, Castellanos DF, Sandfeld S, Zaiser M, Zapperi S. Universal features of amorphous plasticity. Nat Commun. 2017 Jul 03;8:15928. doi: 10.1038/ncomms15928. PMID: 28671191; PMCID: PMC5500855.
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Nat Commun. 2017 Jul 03;8:15928. doi: 10.1038/ncomms15928.

Universal features of amorphous plasticity.

Nature communications

Zoe Budrikis, David Fernandez Castellanos, Stefan Sandfeld, Michael Zaiser, Stefano Zapperi

Affiliations

  1. ISI Foundation, Via Chisola 5, 10126 Torino, Italy.
  2. WW8-Materials Simulation, Department of Materials Science, FAU Universität Erlangen-Nürnberg, Dr.-Mack-Strasse 77, 90762 Fürth, Germany.
  3. Chair of Micromechanical Materials Modelling (MiMM), Institute of Mechanics and Fluid Dynamics, Technische Universität Bergakademie Freiberg (TUBAF), Lampadiusstr. 4, 09596 Freiberg, Germany.
  4. School of Mechanics and Engineering, Southwest Jiaotong University, Chengdu 610031, China.
  5. Center for Complexity and Biosystems, Department of Physics, University of Milano, via Celoria 26, 20133 Milano, Italy.
  6. Department of Applied Physics, Aalto University, P.O. Box 11100 FI-00076 AALTO, Finland.
  7. CNR-ICMATE, Via R. Cozzi 53, 20125 Milano, Italy.

PMID: 28671191 PMCID: PMC5500855 DOI: 10.1038/ncomms15928

Abstract

Plastic yielding of amorphous solids occurs by power-law distributed deformation avalanches whose universality is still debated. Experiments and molecular dynamics simulations are hampered by limited statistical samples, and although existing stochastic models give precise exponents, they require strong assumptions about fixed deformation directions, at odds with the statistical isotropy of amorphous materials. Here, we introduce a fully tensorial, stochastic mesoscale model for amorphous plasticity that links the statistical physics of plastic yielding to engineering mechanics. It captures the complex shear patterning observed for a wide variety of deformation modes, as well as the avalanche dynamics of plastic flow. Avalanches are described by universal size exponents and scaling functions, avalanche shapes, and local stability distributions, independent of system dimensionality, boundary and loading conditions, and stress state. Our predictions consistently differ from those of mean-field depinning models, providing evidence that plastic yielding is a distinct type of critical phenomenon.

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