Picture of boy being examining by doctor at a tuberculosis sanatorium

Understanding our future through Open Access research about our past...

Strathprints makes available scholarly Open Access content by researchers in the Centre for the Social History of Health & Healthcare (CSHHH), based within the School of Humanities, and considered Scotland's leading centre for the history of health and medicine.

Research at CSHHH explores the modern world since 1800 in locations as diverse as the UK, Asia, Africa, North America, and Europe. Areas of specialism include contraception and sexuality; family health and medical services; occupational health and medicine; disability; the history of psychiatry; conflict and warfare; and, drugs, pharmaceuticals and intoxicants.

Explore the Open Access research of the Centre for the Social History of Health and Healthcare. Or explore all of Strathclyde's Open Access research...

Image: Heart of England NHS Foundation Trust. Wellcome Collection - CC-BY.

Exploring the micromechanics of non-active clays via virtual DEM experiments

Pagano, Arianna Gea and Magnanimo, Vanessa and Weinhart, Thomas and Tarantino, Alessandro (2019) Exploring the micromechanics of non-active clays via virtual DEM experiments. Geotechnique. ISSN 0016-8505

[img]
Preview
Text (Gea-Pagano-etal-Geotechnque-2019-Exploring-the-micromechanics-of-non-active-clays-via-virtual)
Gea_Pagano_etal_Geotechnque_2019_Exploring_the_micromechanics_of_non_active_clays_via_virtual.pdf
Accepted Author Manuscript

Download (11MB) | Preview

Abstract

The micromechanical behaviour of clays cannot be investigated experimentally in a direct fashion due to the small size of clay particles. An insight into clay mechanical behaviour at the particle scale can be gained via virtual experiments based on the Discrete Element Method (DEM). So far, most DEM models for clays have been designed on the basis of theoretical formulations of inter-particle interactions, with limited experimental evidence of their actual control over the clay’s macroscopic response. This paper presents a simplified two-dimensional DEM framework where contact laws were inferred from indirect experimental evidence at the microscale by Pedrotti and Tarantino, 2017 (particle-to-particle interactions were probed experimentally by varying the pore-fluid chemistry, and the resulting effect explored via Scanning Electron Microscopy and Mercury Intrusion Porosimetry). The proposed contact laws were successfully tested against their ability to reproduce qualitatively the compression behaviour of clay with pore-fluids of varying pH and dielectric permittivity. The DEM framework presented in this work was intentionally kept simple in order to demonstrate the robustness of the micromechanical concept underlying the proposed contact laws. It is anticipated that a satisfactory quantitative prediction would be achieved by moving to a three-dimensional formulation, by considering polydisperse specimens, and by refining the contact laws.