Bharathi, M. S. ; Ananthakrishna, G. (2002) Chaotic and power law states in the Portevin-Le Chatelier effect Europhysics Letters, 60 (2). pp. 234-240. ISSN 0295-5075
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Official URL: http://iopscience.iop.org/0295-5075/60/2/234
Related URL: http://dx.doi.org/10.1209/epl/i2002-00391-2
Abstract
Recent studies on the Portevin-Le Chatelier effect report an intriguing crossover phenomenon from a low-dimensional chaotic to an infinite-dimensional scale-invariant power law regime in experiments on CuAl single crystals and AlMg polycrystals, as a function of strain rate. We devise a fully dynamical model which reproduces these results. At low and medium strain rates, the model is chaotic with the structure of the attractor resembling the reconstructed experimental attractor. At high strain rates, power law statistics for the magnitudes and durations of the stress drops emerge as in experiments and concomitantly, the largest Lyapunov exponent is zero.
Item Type: | Article |
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Source: | Copyright of this article belongs to EDP Sciences. |
ID Code: | 528 |
Deposited On: | 21 Sep 2010 11:47 |
Last Modified: | 12 May 2011 08:47 |
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