1/f noise and avalanche scaling in plastic deformation

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Abstract

We study the intermittency and noise of dislocation systems undergoing shear deformation. Simulations of a simple two-dimensional discrete dislocation dynamics model indicate that the deformation rate exhibits a power spectrum scaling of the type 1∕fα. The noise exponent is far away from a Lorentzian, with α≈1.5. This result is directly related to the way the durations of avalanches of plastic deformation activity scale with their size.
Original languageEnglish
Article number066106
Pages (from-to)1-5
JournalPhysical Review E
Volume74
Issue number6
DOIs
Publication statusPublished - 2006
MoE publication typeA1 Journal article-refereed

Keywords

  • noise
  • plasticity

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