Force oscillations distort avalanche shapes

Louis W. McFaul, Wendelin J. Wright, Jordan Sickle, Karin A. Dahmen

Research output: Contribution to journalArticle

Abstract

Contradictory scaling behavior in experiments testing the principle of universality may be due to external oscillations. Thus, the effect of damped oscillatory external forces on slip avalanches in slowly deformed solids is simulated using a mean-field model. Akin to a resonance effect, oscillatory driving forces change the dynamics of avalanches with durations close to the oscillation period. This problem can be avoided by tuning mechanical resonance frequencies away from the range of the inverse avalanche durations. The results provide critical guidance for experimental tests for universality and a quantitative understanding of avalanche dynamics under a wide range of driving conditions.

Original languageEnglish (US)
Pages (from-to)496-502
Number of pages7
JournalMaterials Research Letters
Volume7
Issue number12
DOIs
StatePublished - Dec 2 2019

Keywords

  • Plasticity
  • avalanches
  • criticality
  • oscillations
  • scaling behavior

ASJC Scopus subject areas

  • Materials Science(all)

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