Allulakshmi, K, Vinod, JS, Heitor, A orcid.org/0000-0002-2346-8250 et al. (2 more authors) (2021) DEM Study on the Instability Behaviour of Granular Materials. Geotechnical and Geological Engineering, 39. pp. 2175-2185. ISSN 0960-3182
Abstract
This paper presents the discrete element method (DEM) simulations on the instability behaviour of granular materials during constant shear drained condition (CSD). CSD condition was implemented by decreasing mean effective stress on an assembly of particles under strain controlled loading. In this study, the instability condition was predicted at the particle scale level using particle second order work increment (Nicot et al. in Int J Solids Struct 49(10):1252–1258, 2012). The DEM contact parameters have been calibrated to capture the macroscopic responses and the instability behaviour consistently with the laboratory experiments. The effect of different range of initial states at the beginning of CSD condition such as different initial mean effective stress (p′0p0′), void ratio (e0e0) and deviatoric stress (qq) on the instability behaviour were analysed. In addition, the micromechanical parameters such as coordination number, anisotropic coefficients (geometric, mechanical) have been extracted to assist in characterising the instability behaviour during CSD condition. The initial stress state of the soil (i.e. at the onset of CSD) has shown a significant influence on the evolution of anisotropic coefficients. An increase in geometric anisotropy and a decrease in mechanical anisotropy with time was observed after the instability.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © Springer Nature Switzerland AG 2020. This is an author produced version of a journal article published in Geotechnical and Geological Engineering. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Discrete element method; Constant shear stress; Particle scale instability; Anisotropy |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Civil Engineering (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 30 Oct 2020 15:58 |
Last Modified: | 11 Nov 2021 01:38 |
Status: | Published |
Publisher: | Springer |
Identification Number: | 10.1007/s10706-020-01617-7 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:167368 |