Physics – Condensed Matter – Materials Science
Scientific paper
2008-05-21
Int. J. Fract. 151, 281-297 (2008)
Physics
Condensed Matter
Materials Science
22 pages, 14 figs
Scientific paper
The dynamics of a "peeling front" or an elastic line is studied under creep (constant load) conditions. Our experiments show an exponential dependence of the creep velocity on the inverse force (mass) applied. In particular, the dynamical correlations of the avalanche activity are discussed here. We compare various avalanche statistics to those of a line depinning model with non-local elasticity, and study various measures of the experimental avalanche-avalanche and temporal correlations such as the autocorrelation function of the released energy and aftershock activity. From all these we conclude, that internal avalanche dynamics seems to follow "line depinning" -like behavior, in rough agreement with the depinning model. Meanwhile, the correlations reveal subtle complications not implied by depinning theory. Moreover, we also show how these results can be understood from a geophysical point of view.
Alava Mikko J.
Grasso Jean-Robert
Illa Xavier
Koivisto Juha
Rosti Jari
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