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Multifractal Burst in the Spatiotemporal Dynamics of Jerky Flow

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.


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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
Publication: Physical Review Letters
Publisher: American Physical Society (APS)
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
URI: http://eprints.iisc.ac.in/id/eprint/71

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