title: Avalanches and force drops in displacement-driven compression of porous glasses.
abstract: Similarities between force-driven compression experiments of porous materials and earthquakes have been recently proposed. In this paper, we measure the acoustic emission during displacement-driven compression of a porous glass. The energy of acoustic-emission events shows that the failure process exhibits avalanche scale-invariance and therefore follows the Gutenberg-Richter law. The resulting exponents do not exhibit significant differences with respect the force-driven case. Furthermore, the force exhibits an avalanche-type behavior for which the force drops are power-law distributed and correlated with the acoustic emission events.
authors.affiliation: Centre de Recerca Matemàtica, Edifici C, Campus Bellaterra, E-08193 Bellaterra, Catalonia, Spain.|Departament de Matèria Condensada, Facultat de Física, Universitat de Barcelona, Diagonal 645, 08028 Barcelona, Catalonia, Spain.
authors.forename: Víctor
authors.initials: V
authors.lastname: Navas-Portella
authors.affiliation: Centre de Recerca Matemàtica, Edifici C, Campus Bellaterra, E-08193 Bellaterra, Catalonia, Spain.|Departament de Matemàtiques, Universitat Autònoma de Barcelona, Cerdanyola, Catalonia, Spain.
authors.forename: Álvaro
authors.initials: Á
authors.lastname: Corral
authors.affiliation: Departament de Matèria Condensada, Facultat de Física, Universitat de Barcelona, Diagonal 645, 08028 Barcelona, Catalonia, Spain.
authors.forename: Eduard
authors.initials: E
authors.lastname: Vives