Increasing power-law range in avalanche amplitude and energy distributions

Víctor Navas-Portella, Isabel Serra, Álvaro Corral, Eduard Vives

Producció científica: Article en revista indexadaArticleAvaluat per experts

11 Cites (Scopus)


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.

Idioma originalAnglès
Número d’article022134
RevistaPhysical Review E
Estat de la publicacióPublicada - 21 de febr. 2018
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