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Lookup NU author(s): Professor Mohamed Rouainia
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© 2024 John Wiley & Sons Ltd. Currently, our understanding of material-scale deterioration resulting from meteorologically induced variations in pore water pressure and its significant impact on infrastructure slopes is limited. To bridge this knowledge gap, we have developed an extended kinematic hardening constitutive model for unsaturated soils that refines our understanding of weather-driven deterioration mechanisms in heterogeneous clay soils. This model has the capability of predicting the irrecoverable degradation of strength and stiffness that has been shown to occur when soils undergo wetting and drying cycles. The model is equipped with a fully coupled and hysteretic water retention curve and a hysteretic loading–collapse curve and has the capability to predict the irrecoverable degradation of strength and stiffness that occurs during cyclic loading of soils. Here, we employ a fully implicit stress integration technique and give particular emphasis to deriving a consistent tangent operator, which includes the linearisation of the retention curve. The proposed algorithm is evaluated for efficiency and performance by simulating various stress and strain-driven triaxial paths, and the accuracy of the integration technique is evaluated through the use of convergence curves.
Author(s): Monforte L, Rouainia M
Publication type: Article
Publication status: Published
Journal: International Journal for Numerical and Analytical Methods in Geomechanics
Year: 2024
Pages: Epub ahead of print
Online publication date: 08/11/2024
Acceptance date: 14/10/2024
ISSN (print): 0363-9061
ISSN (electronic): 1096-9853
Publisher: John Wiley and Sons Ltd
URL: https://doi.org/10.1002/nag.3878
DOI: 10.1002/nag.3878
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