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

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

2006-11-16

arxiv.org/abs/cond-mat/0611442v1

Phys. Rev. E 74, 066106 (2006)

Physics

Condensed Matter

Statistical Mechanics

6 pages, 5 figures, submitted to Phys. Rev. E

Scientific paper

10.1103/PhysRevE.74.066106

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

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