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arXiv · 1711.06007

Increasing power-law range in avalanche amplitude and energy distributions

Víctor Navas-Portella·Isabel Serra·Álvaro Corral·Eduard Vives
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Abstract

Power-law type probability density functions spanning several orders of magnitude are found for different avalanche properties. We propose a methodology to overcome empirical constrains that limit the power-law range for the distributions of different avalanche observables like amplitude, energy, duration or size. By considering catalogs of events that cover different observation windows, maximum likelihood estimation of a global power-law exponent is computed. This methodology is applied to amplitude and energy distributions of acoustic emission avalanches in failure-under- compression experiments of a nanoporous silica glass, finding in some cases global exponents in an unprecedented broad range: 4.5 decades for amplitudes and 9.5 decades for energies. In the later case, however, strict statistical analysis suggests experimental limitations might alter the power-law behavior.

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Víctor Navas-Portella, Isabel Serra, Álvaro Corral, Eduard Vives. 2017-11-16. Increasing power-law range in avalanche amplitude and energy distributions. https://doi.org/10.1103/physreve.97.022134

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