Bharathi, MS and Lebyodkin, M and Ananthakrishna, G and Fressengeas, C and Kubin, LP (2001) Multifractal Burst in the Spatiotemporal Dynamics of Jerky Flow. In: Physical Review Letters, 87 . 165508-1-4.
The collective behavior of dislocations in jerky flow is studied in Al-Mg polycrystalline samples subjected to constant strain rate tests. Complementary dynamical, statistical, and multifractal analyses are carried out on the stress-time series recorded during jerky flow to characterize the distinct spatiotemporal dynamical regimes. It is shown that the hopping type B and the propagating type A bands correspond to chaotic and self-organized critical states, respectively. The crossover between these types of bands is identified by a large spread in the multifractal spectrum. These results are interpreted on the basis of competing scales and mechanisms.
|Item Type:||Journal Article|
|Additional Information:||The DOI is currently only displayed. Copyright for this article belongs to American Physical Society (APS)|
|Department/Centre:||Division of Chemical Sciences > Materials Research Centre|
|Date Deposited:||14 Jun 2004|
|Last Modified:||19 Sep 2010 04:12|
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