Advanced

Fracture mechanisms in soft rock: Identification and quantification of evolving displacement discontinuities by extended digital image correlation

Nguyen, Tuong Lam; Hall, Stephen LU ; Vacher, Pierre and Viggiani, Gioacchino (2011) In Tectonophysics 503(1-2). p.117-128
Abstract
Deformation of rocks at shallow depths (i.e., at low confining pressures) is primarily driven by the evolution of new fractures or the propagation and coalescence of pre-existing ones. In this paper, fracture evolution from inclined flaws (cuts) in a soft rock deformed under plane-strain uniaxial compression is analyzed using high-resolution digital photographs and Digital Image Correlation (DIC). DIC provides a full-field measurement of the kinematics and thus allows the analysis of non-homogeneous deformation. However, standard DIC approaches do not handle correctly fractures, as they are displacement discontinuities. Therefore, an extended DIC method is developed that allows automatic tracing of discontinuities and their quantification... (More)
Deformation of rocks at shallow depths (i.e., at low confining pressures) is primarily driven by the evolution of new fractures or the propagation and coalescence of pre-existing ones. In this paper, fracture evolution from inclined flaws (cuts) in a soft rock deformed under plane-strain uniaxial compression is analyzed using high-resolution digital photographs and Digital Image Correlation (DIC). DIC provides a full-field measurement of the kinematics and thus allows the analysis of non-homogeneous deformation. However, standard DIC approaches do not handle correctly fractures, as they are displacement discontinuities. Therefore, an extended DIC method is developed that allows automatic tracing of discontinuities and their quantification in terms of the displacement jumps along their length. The analysis of spatial and temporal fracture evolution using this method enhances the understanding of the phenomena in that it provides experimental quantification of fracture mode (opening/closing and shearing). (Less)
Please use this url to cite or link to this publication:
author
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Fracture, Soft rock, Digital image correlation
in
Tectonophysics
volume
503
issue
1-2
pages
117 - 128
publisher
Elsevier
external identifiers
  • Scopus:79954648739
ISSN
0040-1951
DOI
10.1016/j.tecto.2010.09.024
language
English
LU publication?
no
id
04b103fe-6dd4-41cd-86b5-fcad4286649b (old id 2441429)
date added to LUP
2012-04-25 12:32:53
date last changed
2016-10-30 04:38:42
@misc{04b103fe-6dd4-41cd-86b5-fcad4286649b,
  abstract     = {Deformation of rocks at shallow depths (i.e., at low confining pressures) is primarily driven by the evolution of new fractures or the propagation and coalescence of pre-existing ones. In this paper, fracture evolution from inclined flaws (cuts) in a soft rock deformed under plane-strain uniaxial compression is analyzed using high-resolution digital photographs and Digital Image Correlation (DIC). DIC provides a full-field measurement of the kinematics and thus allows the analysis of non-homogeneous deformation. However, standard DIC approaches do not handle correctly fractures, as they are displacement discontinuities. Therefore, an extended DIC method is developed that allows automatic tracing of discontinuities and their quantification in terms of the displacement jumps along their length. The analysis of spatial and temporal fracture evolution using this method enhances the understanding of the phenomena in that it provides experimental quantification of fracture mode (opening/closing and shearing).},
  author       = {Nguyen, Tuong Lam and Hall, Stephen and Vacher, Pierre and Viggiani, Gioacchino},
  issn         = {0040-1951},
  keyword      = {Fracture,Soft rock,Digital image correlation},
  language     = {eng},
  number       = {1-2},
  pages        = {117--128},
  publisher    = {ARRAY(0xa3bdf80)},
  series       = {Tectonophysics},
  title        = {Fracture mechanisms in soft rock: Identification and quantification of evolving displacement discontinuities by extended digital image correlation},
  url          = {http://dx.doi.org/10.1016/j.tecto.2010.09.024},
  volume       = {503},
  year         = {2011},
}