Universal features of amorphous plasticity

Journal article
(Original article)


Publication Details

Author(s): Budrikis Z, Castellanos DF, Sandfeld S, Zaiser M, Zapperi S
Journal: Nature Communications
Publisher: NATURE PUBLISHING GROUP
Publication year: 2017
Volume: 8
ISSN: 2041-1723


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.


FAU Authors / FAU Editors

Sandfeld, Stefan Dr.
Lehrstuhl für Werkstoffsimulation
Zaiser, Michael Prof. Dr.
Lehrstuhl für Werkstoffsimulation


External institutions with authors

Institute for Scientific Interchange (ISI Foundation) / Istituto per l'Interscambio Scientifico


How to cite

APA:
Budrikis, Z., Castellanos, D.F., Sandfeld, S., Zaiser, M., & Zapperi, S. (2017). Universal features of amorphous plasticity. Nature Communications, 8. https://dx.doi.org/10.1038/ncomms15928

MLA:
Budrikis, Zoe, et al. "Universal features of amorphous plasticity." Nature Communications 8 (2017).

BibTeX: 

Last updated on 2019-24-05 at 11:08