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A non-hysteretic simplification to the Glasgow Coupled Model (GCM)

Mutsvairo, Takudzwa; Lloret-Cabot, Marti; Hughes, Paul; Muguda-Viswanath, Sravan; Dias, Ana Sofia

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Authors

Takkie Mutsvairo takudzwa.m.mutsvairo@durham.ac.uk
PGR Student Doctor of Philosophy

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Ana Dias a.p.c.dias@durham.ac.uk
PGR Student Doctor of Philosophy



Contributors

William M. Coombs
Editor

Abstract

The Glasgow Coupled Model (GCM) is an established elasto-plastic constitutive model developed to capture the coupled hydro-mechanical response of unsaturated soils. This study highlights the unique capabilities of the GCM in modelling the water retention and mechanical behaviour of unsaturated soils. Namely, its ability to capture the scanning, main wetting and main drying water retention responses, the mechanical response (including volume change and shear strength), and the coupling between the water retention and mechanical behaviour. However, due to the multiple yielding scenarios that a given stress path can trigger, numerical integration of the model is challenging and adjustments towards a more simplified approach are desirable if the model is to be used in geotechnical practice. For this purpose, the capabilities of a simplified non-hysteretic version of the GCM, designed to streamline its formulation, are investigated in this paper. The non-hysteretic model requires less parameters and simplifies the identification of the elasto-plastic mechanism activated by a stress path, at the expense of limiting some of the original modelling abilities.

Presentation Conference Type Conference Paper (Published)
Conference Name 2024 UK Association for Computational Mechanics Conference
Start Date Apr 10, 2024
End Date Apr 12, 2024
Acceptance Date Jan 26, 2024
Online Publication Date Apr 25, 2024
Publication Date Apr 25, 2024
Deposit Date Jun 21, 2024
Publicly Available Date Jul 11, 2024
Publisher Durham University
Pages 113-116
Book Title UKACM Proceedings 2024
DOI https://doi.org/10.62512/conf.ukacm2024.060
Public URL https://durham-repository.worktribe.com/output/2488150

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