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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Abstract

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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