A consistent calibration process for the Matsuoka-Nakai friction angle under direct simple shear conditions for clay hypoplasticity
A consistent calibration process for the Matsuoka-Nakai friction angle under direct simple shear conditions for clay hypoplasticity
In geotechnical engineering, direct simple shear (DSS) tests are used to determine strength and stiffness parameters of a material. DSS predictions of a constitutive model influence failure mechanisms in plane-strain, finite-element applications. In this article, we introduce a closed-form solution to determine the Matsuoka–Nakai equivalent critical friction angle from direct simple shear stress and normal stress data. In order to apply it to clay hypoplasticity (Mašín, 2013), we carry out DSS simulations to investigate rotations of principal stresses and the principal stress state at critical state for plane-strain conditions.
Finally, we interpret DSS predictions of clay hypoplasticity for different overconsolidation ratios and demonstrate that the location of the CSL in the vertical stress–void ratio plane coincides with the location of the CSL in mean effective stress–void ratio plane.
Clay, Critical state, Direct simple shear, Hypoplasticity, Matsuoka–Nakai
Medicus, Gertraud
391a1046-f9f0-4457-a444-63708e19fed3
Kwa, Katherine
18faee0d-75d9-4683-a2c8-604625eecbb0
Cerfontaine, Benjamin
0730daf4-9d6b-4f2d-a848-a3fc54505a02
October 2022
Medicus, Gertraud
391a1046-f9f0-4457-a444-63708e19fed3
Kwa, Katherine
18faee0d-75d9-4683-a2c8-604625eecbb0
Cerfontaine, Benjamin
0730daf4-9d6b-4f2d-a848-a3fc54505a02
Medicus, Gertraud, Kwa, Katherine and Cerfontaine, Benjamin
(2022)
A consistent calibration process for the Matsuoka-Nakai friction angle under direct simple shear conditions for clay hypoplasticity.
Computers and Geotechnics, 150 (104888), [104888].
(doi:10.1016/j.compgeo.2022.104888).
Abstract
In geotechnical engineering, direct simple shear (DSS) tests are used to determine strength and stiffness parameters of a material. DSS predictions of a constitutive model influence failure mechanisms in plane-strain, finite-element applications. In this article, we introduce a closed-form solution to determine the Matsuoka–Nakai equivalent critical friction angle from direct simple shear stress and normal stress data. In order to apply it to clay hypoplasticity (Mašín, 2013), we carry out DSS simulations to investigate rotations of principal stresses and the principal stress state at critical state for plane-strain conditions.
Finally, we interpret DSS predictions of clay hypoplasticity for different overconsolidation ratios and demonstrate that the location of the CSL in the vertical stress–void ratio plane coincides with the location of the CSL in mean effective stress–void ratio plane.
Text
Medicus_et_al_2022-A consistent calibration process for the Matsuoka–Nakai friction angle under direct simple shear conditions for clay hypoplasticity
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Accepted/In Press date: 23 June 2022
e-pub ahead of print date: 6 July 2022
Published date: October 2022
Additional Information:
Funding Information:
This research was funded in part, by the Austrian Science Fund (FWF) V 918 . For the purpose of open access, the authors have applied a CC BY public copyright licence to any Author Accepted Manuscript version arising from this submission. G.M. was further funded by the Austrian Science Fund (FWF): P 28934 and is grateful for the support of the University of Innsbruck: ProLehre Project Animating Soil Models: soilmodels.com/soilanim , AURORA Challenge Domains. K.K is funded by The Royal Academy of Engineering Chair in Emerging Technologies for Intelligent & Resilient Ocean Engineering and the EPSRC Supergen Offshore Renewable Energy (ORE) Hub ( EP/S000747/1 ).
Publisher Copyright:
© 2022 Elsevier Ltd
Keywords:
Clay, Critical state, Direct simple shear, Hypoplasticity, Matsuoka–Nakai
Identifiers
Local EPrints ID: 469214
URI: http://eprints.soton.ac.uk/id/eprint/469214
ISSN: 0266-352X
PURE UUID: 519ac91d-18e8-4970-9608-a3f51c678f36
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Date deposited: 09 Sep 2022 16:38
Last modified: 17 Mar 2024 04:02
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Author:
Gertraud Medicus
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