Phys. Rev. E 74, 066106 (2006) [5 pages]1∕f noise and avalanche scaling in plastic deformationReceived 27 July 2006; revised 4 October 2006; published 13 December 2006 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. © 2006 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevE.74.066106
DOI:
10.1103/PhysRevE.74.066106
PACS:
62.20.Mk, 05.40.−a, 61.72.Bb, 89.75.−k
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