Noise spectra in the reversible-irreversible transition in amorphous solids under oscillatory driving

Ido Regev, C. Reichhardt, C. J.O. Reichhardt

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

We study the stress fluctuations in simulations of a two-dimensional amorphous solid under a cyclic drive. It is known that this system organizes into a reversible state for small driving amplitudes and remains in an irreversible state for high driving amplitudes, and that a critical driving amplitude separates the two regimes. Here we study the time series of the stress fluctuations below and above the reversible-irreversible transition. In the irreversible regime above the transition, the power spectrum of the stress fluctuations is broad and has a 1/f α shape with 1 < α < 2. We find that the low frequency noise power peaks near the stress at which dc yielding occurs, which is consistent with the behavior expected in systems undergoing a non-equilibrium phase transition.

Original languageEnglish
Article number084004
JournalModelling and Simulation in Materials Science and Engineering
Volume27
Issue number8
DOIs
StatePublished - 4 Sep 2019

Keywords

  • amorphous solids
  • noise spectra
  • reversible-irreversible transition

ASJC Scopus subject areas

  • Modeling and Simulation
  • Materials Science (all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Computer Science Applications

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