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$1/f$ noise and avalanche scaling in plastic deformation

Lasse Laurson·Mikko Alava
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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 $1/f^α$. The noise exponent is far away from a Lorentzian, with $α\approx 1.5$. This result is directly related to the way the durations of avalanches of plastic deformation activity scale with their size.

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BibTeXRIS

Lasse Laurson, Mikko Alava. 2006-11-16. $1/f$ noise and avalanche scaling in plastic deformation. https://doi.org/10.1103/physreve.74.066106

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