A DEM investigation of the shearing behaviour of non-active clays

Arianna Gea Pagano, Vanessa Magnanimo, Alessandro Tarantino

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

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Abstract

This paper presents the numerical DEM simulation of shear tests on two-dimensional clay-like specimens. Clay particles are modelled as rod-shaped elements made of spherical elementary units. The contact laws implemented in the adopted DEM framework account for both the mechanical interaction developing between particles in contact, and the long-range electro-chemical interaction in the form of Coulombian attraction/repulsion between charged particles. Virtual specimens for shear testing are obtained via the one-dimensional compression and unloading of clay-like particle assemblies, in order to study the effect of different over consolidation ratios on the macroscopic mechanical behaviour. The DEM framework is challenged against its ability to reproduce qualitatively key aspects of the macroscopic behaviour of normally consolidated and over consolidated clays during shearing, including contractive and dilative behaviour, and monotonic and non-monotonic stress-strain behaviour.

Original languageEnglish
Title of host publication7th International Symposium on Deformation Characteristics of Geomaterials, IS-Glasgow 2019
EditorsErdin Ibraim, Alessandro Tarantino
PublisherEDP Sciences
ISBN (Electronic)9782759890644
DOIs
Publication statusPublished - 25 Jun 2019
Event7th International Symposium on Deformation Characteristics of Geomaterials, IS-Glasgow 2019 - Strathclyde's Technology & Innovation Centre, Glasgow, United Kingdom
Duration: 26 Jun 201928 Jun 2019
Conference number: 7
https://www.is-glasgow2019.org.uk/

Publication series

NameE3S Web of Conferences
Volume92
ISSN (Print)2555-0403
ISSN (Electronic)2267-1242

Conference

Conference7th International Symposium on Deformation Characteristics of Geomaterials, IS-Glasgow 2019
Abbreviated titleIS-Glasgow 2019
CountryUnited Kingdom
CityGlasgow
Period26/06/1928/06/19
Internet address

Fingerprint

Shearing
digital elevation model
Clay
clay
shear test
Charged particles
unloading
Unloading
Consolidation
consolidation
Compaction
compression
particle
Computer simulation
Testing
simulation

Cite this

Pagano, A. G., Magnanimo, V., & Tarantino, A. (2019). A DEM investigation of the shearing behaviour of non-active clays. In E. Ibraim, & A. Tarantino (Eds.), 7th International Symposium on Deformation Characteristics of Geomaterials, IS-Glasgow 2019 [14003] (E3S Web of Conferences; Vol. 92). EDP Sciences. https://doi.org/10.1051/e3sconf/20199214003
Pagano, Arianna Gea ; Magnanimo, Vanessa ; Tarantino, Alessandro. / A DEM investigation of the shearing behaviour of non-active clays. 7th International Symposium on Deformation Characteristics of Geomaterials, IS-Glasgow 2019. editor / Erdin Ibraim ; Alessandro Tarantino. EDP Sciences, 2019. (E3S Web of Conferences).
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Pagano, AG, Magnanimo, V & Tarantino, A 2019, A DEM investigation of the shearing behaviour of non-active clays. in E Ibraim & A Tarantino (eds), 7th International Symposium on Deformation Characteristics of Geomaterials, IS-Glasgow 2019., 14003, E3S Web of Conferences, vol. 92, EDP Sciences, 7th International Symposium on Deformation Characteristics of Geomaterials, IS-Glasgow 2019, Glasgow, United Kingdom, 26/06/19. https://doi.org/10.1051/e3sconf/20199214003

A DEM investigation of the shearing behaviour of non-active clays. / Pagano, Arianna Gea; Magnanimo, Vanessa; Tarantino, Alessandro.

7th International Symposium on Deformation Characteristics of Geomaterials, IS-Glasgow 2019. ed. / Erdin Ibraim; Alessandro Tarantino. EDP Sciences, 2019. 14003 (E3S Web of Conferences; Vol. 92).

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

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AB - This paper presents the numerical DEM simulation of shear tests on two-dimensional clay-like specimens. Clay particles are modelled as rod-shaped elements made of spherical elementary units. The contact laws implemented in the adopted DEM framework account for both the mechanical interaction developing between particles in contact, and the long-range electro-chemical interaction in the form of Coulombian attraction/repulsion between charged particles. Virtual specimens for shear testing are obtained via the one-dimensional compression and unloading of clay-like particle assemblies, in order to study the effect of different over consolidation ratios on the macroscopic mechanical behaviour. The DEM framework is challenged against its ability to reproduce qualitatively key aspects of the macroscopic behaviour of normally consolidated and over consolidated clays during shearing, including contractive and dilative behaviour, and monotonic and non-monotonic stress-strain behaviour.

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Pagano AG, Magnanimo V, Tarantino A. A DEM investigation of the shearing behaviour of non-active clays. In Ibraim E, Tarantino A, editors, 7th International Symposium on Deformation Characteristics of Geomaterials, IS-Glasgow 2019. EDP Sciences. 2019. 14003. (E3S Web of Conferences). https://doi.org/10.1051/e3sconf/20199214003