Direct Observation of Percolation in the Yielding Transition of Colloidal Glasses

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

Tutkijat

  • Antina Ghosh
  • Zoe Budrikis
  • Vijayakumar Chikkadi
  • Alessandro L. Sellerio
  • Stefano Zapperi
  • Peter Schall

Organisaatiot

  • University of Amsterdam
  • Max Planck Institute for Intelligent Systems
  • Institute for Scientific Interchange Foundation
  • University of Milan
  • Center for Complexity and Biosystems

Kuvaus

When strained beyond the linear regime, soft colloidal glasses yield to steady-state plastic flow in a way that is similar to the deformation of conventional amorphous solids. Because of the much larger size of the colloidal particles with respect to the atoms comprising an amorphous solid, colloidal glasses allow us to obtain microscopic insight into the nature of the yielding transition, as we illustrate here combining experiments, atomistic simulations, and mesoscopic modeling. Our results unanimously show growing clusters of nonaffine deformation percolating at yielding. In agreement with percolation theory, the spanning cluster is fractal with a fractal dimension df≃2, and the correlation length diverges upon approaching the critical yield strain. These results indicate that percolation of highly nonaffine particles is the hallmark of the yielding transition in disordered glassy systems.

Yksityiskohdat

AlkuperäiskieliEnglanti
Artikkeli148001
Sivut1-6
JulkaisuPhysical Review Letters
Vuosikerta118
Numero14
TilaJulkaistu - 5 huhtikuuta 2017
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

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