Zhu, Q-Y, Zhuang, P-Z, Yin, Z-Y et al. (1 more author) (2021) State parameter–based thermomechanical constitutive model for saturated fine-grained soils. Canadian Geotechnical Journal, 58 (7). pp. 1045-1058. ISSN 0008-3674
Abstract
This paper presents a two-surface constitutive model for describing thermomechanical behaviour of saturated fine-grained soils at both normally consolidated and overconsolidated states. A thermal-dependent stress ratio-state parameter relation is adopted to account for the effects of temperature on the shape of the state boundary surface (SBS) of soils. In the model, both the size and the shape of the SBS are allowed to vary with temperature, which is evidenced by thermal variation of the mechanical yield loci and the shifts of the normal consolidation line (NCL) and the critical state line (CSL) upon heating and (or) cooling. A thermal yield surface is added for modelling the isotropic thermal deformation of soils more accurately, in particular at overconsolidated states. The mechanical and thermal yield mechanisms are coupled through the temperature-dependent preconsolidation pressure that is controlled by a volumetric hardening law. Based on experimental observations, a nonlinear relationship between the spacing ratio and temperature changes is defined and a simple thermal dependent non-associated flow rule is proposed. The model is validated against some selected experimental results of several soils tested under various mechanical and thermal paths such as drained isotropic heating and cooling, drained and undrained triaxial compression at non-isothermal conditions.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | This item is protected by copyright, all rights reserved. This is an author produced version of an article published in Canadian Geotechnical Journal. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | temperature effects; constitutive relations; clays; plasticity; state parameter |
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: | 27 Aug 2021 13:09 |
Last Modified: | 27 Aug 2021 13:09 |
Status: | Published |
Publisher: | NRC Research Press (Canadian Science Publishing) |
Identification Number: | 10.1139/cgj-2019-0322 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:177476 |