Avalanches in Breakdown and Fracture Processes

Дата и время публикации : 1999-01-18T18:54:39Z

Авторы публикации и институты :
Stefano Zapperi
Purusattam Ray
H. Eugene Stanley
Alessandro Vespignani

Ссылка на журнал-издание: Ссылка на журнал-издание не найдена
Коментарии к cтатье: 15 pages, 12 figures, submitted to Phys. Rev. E, corrected typo in authors name, no changes to the paper
Первичная категория: cond-mat.stat-mech

Все категории : cond-mat.stat-mech, cond-mat.mtrl-sci

Краткий обзор статьи: We investigate the breakdown of disordered networks under the action of an increasing external—mechanical or electrical—force. We perform a mean-field analysis and estimate scaling exponents for the approach to the instability. By simulating two-dimensional models of electric breakdown and fracture we observe that the breakdown is preceded by avalanche events. The avalanches can be described by scaling laws, and the estimated values of the exponents are consistent with those found in mean-field theory. The breakdown point is characterized by a discontinuity in the macroscopic properties of the material, such as conductivity or elasticity, indicative of a first order transition. The scaling laws suggest an analogy with the behavior expected in spinodal nucleation.

Category: Physics