Universal features of amorphous plasticity

Beitrag in einer Fachzeitschrift

Details zur Publikation

Autorinnen und Autoren: Budrikis Z, Castellanos DF, Sandfeld S, Zaiser M, Zapperi S
Zeitschrift: Nature Communications
Jahr der Veröffentlichung: 2017
Band: 8
ISSN: 2041-1723


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-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

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

Einrichtungen weiterer Autorinnen und Autoren

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


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

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


Zuletzt aktualisiert 2019-24-05 um 11:08