1/f noise and avalanche scaling in plastic deformation

Loading...
Thumbnail Image
Journal Title
Journal ISSN
Volume Title
School of Science | A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2006
Major/Subject
Mcode
Degree programme
Language
en
Pages
066106/1-5
Series
Physical Review E, Volume 74, Issue 6
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.
Description
Keywords
intermittency, noise, plasticity, dislocation systems
Other note
Citation
Laurson, L. & Alava, Mikko J. 2006. 1/f noise and avalanche scaling in plastic deformation. Physical Review E. Volume 74, Issue 6. 066106/1-5. ISSN 1539-3755 (printed). DOI: 10.1103/physreve.74.066106.