Chen, Liuxin, Ghorbani, Javad, Dutta, Troyee Tanu, Zhou, Annan, McCartney, John S., and Kodikara, Jayantha (2024) A new multi-surface plasticity model for cyclic hardening of unsaturated granular soils. Computers and Geotechnics, 173. 106500.

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Abstract

This paper proposes a new multi-surface plasticity model for the cyclic hardening of unsaturated granular soils crucial for assessing their resilience jointly under repeated loading and changing climatic conditions. The model incorporates a generalised kinematic hardening law and a double logarithmic compressibility law, both of which are essential to accurately simulate soil cyclic behaviour, particularly when considering water retention hysteresis and volume change dependence. A tailored adaptive sub-stepping stress integration algorithm has also been developed, featuring a sub-algorithm for initial hydraulic state and path determination adaptable to various soil water retention curve formulations. The model is validated through experimental results obtained from repeated load triaxial tests and cyclic simple shear tests on unsaturated granular soils under diverse initial void ratios and suctions. The study underscores the importance of soil water retention properties in plastic strain development and offers predictive axial plastic strain contours on the compaction plane. These findings provide essential insights for soil performance optimisation and practical guidelines for effective soil compaction in field applications.

Item ID:	85642
Item Type:	Article (Research - C1)
ISSN:	1873-7633
Copyright Information:	© 2024 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
Date Deposited:	28 May 2025 03:14
FoR Codes:	40 ENGINEERING > 4005 Civil engineering > 400502 Civil geotechnical engineering @ 50% 40 ENGINEERING > 4019 Resources engineering and extractive metallurgy > 401902 Geomechanics and resources geotechnical engineering @ 50%
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