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Influence of fissure inclination and confining pressure on the local behaviour of natural clays

Tudisco, Erika LU ; Vitone, Claudia ; Mondello, Cristina ; Viggiani, Gioacchino ; Hall, Stephen A. LU ; Cotecchia, Federica ; Castellano, Alessandra and Massaro, Francesco (2019) 7th International Symposium on Deformation Characteristics of Geomaterials, IS-Glasgow 2019 In E3S Web of Conferences 92.
Abstract

In this experimental study the influence of fissuring orientation and confinement pressure on the mechanical behaviour of natural clays is investigated. The tested material, the scaly clay from Santa Croce di Magliano (south of Italy), is characterised by an intense network of pre-existing fissures of single orientation. Several plane strain compression tests have been conducted, under different confinement pressures (i.e., from 50 to 600 kPa), on specimens having fissures with vertical, medium and horizontal inclination. Digital Image Correlation has been used to follow the deformation processes of the specimens throughout the tests by measuring incremental shear and volumetric strain maps. The results showed a strong coupling between... (More)

In this experimental study the influence of fissuring orientation and confinement pressure on the mechanical behaviour of natural clays is investigated. The tested material, the scaly clay from Santa Croce di Magliano (south of Italy), is characterised by an intense network of pre-existing fissures of single orientation. Several plane strain compression tests have been conducted, under different confinement pressures (i.e., from 50 to 600 kPa), on specimens having fissures with vertical, medium and horizontal inclination. Digital Image Correlation has been used to follow the deformation processes of the specimens throughout the tests by measuring incremental shear and volumetric strain maps. The results showed a strong coupling between the total confinement and the fissure inclination, that is controlling both the onset and the development of the patterns of the localisation processes. The new results have been compared with previous ones carried out on the same material without confinement. The comparison shed light on the role of total confinement that becomes particularly relevant from certain levels of pressures and fissuring inclination.

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author
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organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
host publication
7th International Symposium on Deformation Characteristics of Geomaterials, IS-Glasgow 2019
series title
E3S Web of Conferences
editor
Ibraim, Erdin and Tarantino, Alessandro
volume
92
article number
03004
publisher
EDP Sciences
conference name
7th International Symposium on Deformation Characteristics of Geomaterials, IS-Glasgow 2019
conference location
Glasgow, United Kingdom
conference dates
2019-06-26 - 2019-06-28
external identifiers
  • scopus:85069683791
ISSN
2267-1242
ISBN
9782759890644
DOI
10.1051/e3sconf/20199203004
language
English
LU publication?
yes
id
8e02cc11-08aa-4d5b-b56c-8ab6455b9faf
date added to LUP
2019-08-08 11:04:33
date last changed
2020-07-25 02:31:14
@inproceedings{8e02cc11-08aa-4d5b-b56c-8ab6455b9faf,
  abstract     = {<p>In this experimental study the influence of fissuring orientation and confinement pressure on the mechanical behaviour of natural clays is investigated. The tested material, the scaly clay from Santa Croce di Magliano (south of Italy), is characterised by an intense network of pre-existing fissures of single orientation. Several plane strain compression tests have been conducted, under different confinement pressures (i.e., from 50 to 600 kPa), on specimens having fissures with vertical, medium and horizontal inclination. Digital Image Correlation has been used to follow the deformation processes of the specimens throughout the tests by measuring incremental shear and volumetric strain maps. The results showed a strong coupling between the total confinement and the fissure inclination, that is controlling both the onset and the development of the patterns of the localisation processes. The new results have been compared with previous ones carried out on the same material without confinement. The comparison shed light on the role of total confinement that becomes particularly relevant from certain levels of pressures and fissuring inclination.</p>},
  author       = {Tudisco, Erika and Vitone, Claudia and Mondello, Cristina and Viggiani, Gioacchino and Hall, Stephen A. and Cotecchia, Federica and Castellano, Alessandra and Massaro, Francesco},
  booktitle    = {7th International Symposium on Deformation Characteristics of Geomaterials, IS-Glasgow 2019},
  editor       = {Ibraim, Erdin and Tarantino, Alessandro},
  isbn         = {9782759890644},
  issn         = {2267-1242},
  language     = {eng},
  month        = {06},
  publisher    = {EDP Sciences},
  series       = {E3S Web of Conferences},
  title        = {Influence of fissure inclination and confining pressure on the local behaviour of natural clays},
  url          = {http://dx.doi.org/10.1051/e3sconf/20199203004},
  doi          = {10.1051/e3sconf/20199203004},
  volume       = {92},
  year         = {2019},
}