Full-field measurements of strain localisation in sandstone by neutron tomography and 3D-volumetric digital image correlation
Tudisco, Erika LU
; Hall, Stephen
LU
; Charalampidou, Elli Maria
; Kardjilov, Nikolaj
; Hilger, André
and Sone, Hiroki
(2015)
69.
p.509-515
- Abstract
- Recent studies have demonstrated that the combination of x-ray tomography during triaxial tests (”in-situ” tests) and 3D-
volumetric Digital Image Correlation (3D-DIC) can provide important insight into the mechanical behaviour and deformation
processes of granular materials such as sand. The application of these tools to investigate the mechanisms of failure in rocks is
also of obvious interest. However, the relevant applied confining pressures for triaxial testing on rocks are higher than those on
sands and therefore stronger pressure containment vessels, i.e., made of thick metal walls, are required. This makes in-situ x-ray
imaging of rock deformation during triaxial tests a challenge. One... (More) - Recent studies have demonstrated that the combination of x-ray tomography during triaxial tests (”in-situ” tests) and 3D-
volumetric Digital Image Correlation (3D-DIC) can provide important insight into the mechanical behaviour and deformation
processes of granular materials such as sand. The application of these tools to investigate the mechanisms of failure in rocks is
also of obvious interest. However, the relevant applied confining pressures for triaxial testing on rocks are higher than those on
sands and therefore stronger pressure containment vessels, i.e., made of thick metal walls, are required. This makes in-situ x-ray
imaging of rock deformation during triaxial tests a challenge. One possible solution to overcome this problem is to use neutrons,
which should better penetrate the metal-walls of the pressure vessels. In this perspective, this work assesses the capability of
neutron tomography with 3D-DIC to measure deformation fields in rock samples. Results from pre- and post-deformation neutron
tomography of a Bentheim sandstone sample deformed ex-situ at 40 MPa show that clear images of the internal structure can
be achieved and utilised for 3D-DIC analysis to reveal the details of the 3D strain field. From these results the character of the
localised deformation in the study sample can thus be described. Furthermore, comparison with analyses based on equivalent x-ray
tomography imaging of the same sample confirms the effectiveness of the method in relation to the more established x-ray based
approach. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/7513527
- author
- Tudisco, Erika
LU
; Hall, Stephen
LU
; Charalampidou, Elli Maria
; Kardjilov, Nikolaj
; Hilger, André
and Sone, Hiroki
- organization
- publishing date
- 2015
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- keywords
- X-rays, Neutrons, Digital Image Correlation, Tomography, Rocks
- host publication
- Physics Procedia - 10th World Conference on Neutron Radiography
- editor
- Kaestner, Anders
- volume
- 69
- pages
- 7 pages
- publisher
- Elsevier
- external identifiers
-
- scopus:84974559550
- wos:000380606800072
- DOI
- 10.1016/j.phpro.2015.07.072
- language
- English
- LU publication?
- yes
- id
- 6f65b162-2498-4fd0-a31e-803ca0bacb05 (old id 7513527)
- date added to LUP
- 2016-04-04 10:10:48
- date last changed
- 2022-04-08 05:16:36
@inproceedings{6f65b162-2498-4fd0-a31e-803ca0bacb05,
abstract = {{Recent studies have demonstrated that the combination of x-ray tomography during triaxial tests (”in-situ” tests) and 3D-<br/><br>
volumetric Digital Image Correlation (3D-DIC) can provide important insight into the mechanical behaviour and deformation<br/><br>
processes of granular materials such as sand. The application of these tools to investigate the mechanisms of failure in rocks is<br/><br>
also of obvious interest. However, the relevant applied confining pressures for triaxial testing on rocks are higher than those on<br/><br>
sands and therefore stronger pressure containment vessels, i.e., made of thick metal walls, are required. This makes in-situ x-ray<br/><br>
imaging of rock deformation during triaxial tests a challenge. One possible solution to overcome this problem is to use neutrons,<br/><br>
which should better penetrate the metal-walls of the pressure vessels. In this perspective, this work assesses the capability of<br/><br>
neutron tomography with 3D-DIC to measure deformation fields in rock samples. Results from pre- and post-deformation neutron<br/><br>
tomography of a Bentheim sandstone sample deformed ex-situ at 40 MPa show that clear images of the internal structure can<br/><br>
be achieved and utilised for 3D-DIC analysis to reveal the details of the 3D strain field. From these results the character of the<br/><br>
localised deformation in the study sample can thus be described. Furthermore, comparison with analyses based on equivalent x-ray<br/><br>
tomography imaging of the same sample confirms the effectiveness of the method in relation to the more established x-ray based<br/><br>
approach.}},
author = {{Tudisco, Erika and Hall, Stephen and Charalampidou, Elli Maria and Kardjilov, Nikolaj and Hilger, André and Sone, Hiroki}},
booktitle = {{Physics Procedia - 10th World Conference on Neutron Radiography}},
editor = {{Kaestner, Anders}},
keywords = {{X-rays; Neutrons; Digital Image Correlation; Tomography; Rocks}},
language = {{eng}},
pages = {{509--515}},
publisher = {{Elsevier}},
title = {{Full-field measurements of strain localisation in sandstone by neutron tomography and 3D-volumetric digital image correlation}},
url = {{http://dx.doi.org/10.1016/j.phpro.2015.07.072}},
doi = {{10.1016/j.phpro.2015.07.072}},
volume = {{69}},
year = {{2015}},
}