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research article

Avalanches in dry and saturated disordered media at fracture

Milanese, Enrico  
•
Yilmaz, Okan  
•
Molinari, Jean-François  
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2016
Physical Review E

This paper analyzes fracturing in inhomogeneous media under dry and fully saturated conditions. We adopt a central force model with continuous damage to study avalanche behavior in a two-dimensional truss lattice undergoing dilation. Multiple fractures can develop at once and a power-law distribution of the avalanche size is observed. The values for the power-law exponent are compared with the ones found in the literature and scale-free behavior is suggested. The fracture evolves intermittently in time because only some avalanches correspond to fracture advancement. A fully saturated model with continuous damage based on the extended Biot's theory is developed and avalanche behavior is studied in the presence of fluid, varying the fluid boundary conditions. We show that power-law behavior is destroyed when the fluid flux governs the problem. Fluid pressure behavior during intermittent crack tip advancement is studied for the continuous-damage fully saturated model. It is found that when mechanical loading prevails, the pressure rises when the crack advances, while when fluid loading prevails, the pressure drops when the crack advances.

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Type
research article
DOI
10.1103/PhysRevE.93.043002
Web of Science ID

WOS:000373771700010

Author(s)
Milanese, Enrico  
Yilmaz, Okan  
Molinari, Jean-François  
Schrefler, Bernhard
Date Issued

2016

Publisher

Amer Physical Soc

Published in
Physical Review E
Volume

93

Issue

4

Article Number

043002

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LSMS  
Available on Infoscience
April 15, 2016
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/125713
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