Disorder enhances the effects of thermal noise in the fiber bundle model
Supérieure de Lyon, Laboratoire de Physique,
46, Allée d'Italie, 69364 Lyon Cedex 07, France
Accepted: 14 June 2001
The statistical properties of failure are studied in a fiber bundle model with thermal noise. We show that the macroscopic failure is produced by a thermal activation of microcracks. Most importantly, the effective temperature of the system is amplified by the spatial disorder (heterogeneity) of the fiber bundle. These results give new insight to the study of thermally activated cracks and they can be useful in the study of electrical networks.
PACS: 05.70.Ln – Nonequilibrium and irreversible thermodynamics / 62.20.Mk – Fatigue, brittleness, fracture, and cracks / 61.43.-j – Disordered solids
© EDP Sciences, 2001