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Title: Increasing power-law range in avalanche amplitude and energy distributions
Author: Navas Portella, Víctor
Serra, Isabel
Corral, Álvaro
Vives i Santa-Eulàlia, Eduard
Keywords: Sistemes complexos
Materials porosos
Complex systems
Porous materials
Issue Date: 21-Feb-2018
Publisher: American Physical Society
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 constraints that limit the range of truncated power-law distributions. By considering catalogs of events that cover different observation windows, the 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 latter case, however, strict statistical analysis suggests experimental limitations might alter the power-law behavior.
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It is part of: Physical Review e, 2018, vol. 97, num. 2, p. 022134
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ISSN: 2470-0045
Appears in Collections:Articles publicats en revistes (Física de la Matèria Condensada)
Articles publicats en revistes (Institut de Recerca en Sistemes Complexos (UBICS))

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