Determination of the universality class of crystal plasticity

Although scaling phenomena have long been documented in crystalline plasticity, the universality class has been difficult to identify due to the rarity of avalanche events, which require large system sizes and long times in order to accurately measure scaling exponents and functions. Here the author...

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Bibliographic Details
Published in:Europhysics letters 2013-02, Vol.101 (3), p.P1-P1
Main Authors: Tsekenis, G, Uhl, J T, Goldenfeld, N, Dahmen, K A
Format: Article
Language:English
Subjects:
Avalanches
Crystal structure
Crystals
Dynamical systems
Dynamics
Exponents
Mathematical models
Plasticity
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Summary:Although scaling phenomena have long been documented in crystalline plasticity, the universality class has been difficult to identify due to the rarity of avalanche events, which require large system sizes and long times in order to accurately measure scaling exponents and functions. Here the authors present comprehensive simulations of two-dimensional dislocation dynamics under shear, using finite-size scaling to extract scaling exponents and the avalanche profile scaling function from time-resolved measurements of slip avalanches. Their results provide compelling evidence that both the static and dynamic universality classes are consistent with the mean-field interface depinning model.
ISSN:0295-5075
1286-4854