Avalanches in breakdown and fracture processes

Title:
Avalanches in breakdown and fracture processes
Creator:
Zapperi, S (Author)
Ray, P (Author)
Stanley, H E (Author)
Vespignani, A (Author)
Language:
English
Publisher:
American Physical Society
Copyright date:
1999
Type of resource:
Text
Genre:
Articles
Format:
electronic
Digital origin:
born digital
Abstract/Description:
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.
Comments:
Originally published in Physical Review E, v.59 no.5 (1999), pp.5049-5057. DOI:10.1103/PhysRevE.59.5049. Dr. Vespignani is affiliated with Northeastern University as of the time of deposit.
Subjects and keywords:
Scaling laws (Statistical physics)
Breakdown (Electricity)
Mean field theory
disordered networks
avalanche events
Physics
Permanent Link:
http://hdl.handle.net/2047/d20002169

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