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Localised failure of geomaterials: how to extract localisation band behaviour from macro test data

Le, Linh A. and Nguyen, Giang D. and Bui, Ha H. and Andrade, José E. (2022) Localised failure of geomaterials: how to extract localisation band behaviour from macro test data. Géotechnique, 72 (7). pp. 596-609. ISSN 0016-8505. doi:10.1680/jgeot.20.p.105. https://resolver.caltech.edu/CaltechAUTHORS:20220715-744243000

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Abstract

The formulation and calibration of constitutive models for geomaterials require material behaviour from experiments under a wide range of triaxial loading conditions. However, failure of geomaterials usually involves localisation of deformation that leads to very strong inhomogeneous behaviour. Therefore, the experimentally measured macro (specimen) behaviour is a mix between very different responses inside and outside the localisation zone and thus should not be used as a true representation of the material responses. This paper proposes a theoretical framework that provides links between mechanical responses inside and outside the localisation band, alongside their contributions toward the overall behaviour of a specimen undergoing localised deformation. This meso–macro connection allows the quantification of behaviour inside the localisation band, which is the main source of material inelasticity, from experimentally measured specimen behaviour. Correlation between the thickness of the localisation band and its behaviour is shown, bounded by a unique stress–deformation relationship describing the behaviour of an idealised zero-thickness localisation band.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1680/jgeot.20.P.105DOIArticle
ORCID:
AuthorORCID
Le, Linh A.0000-0002-3560-7481
Nguyen, Giang D.0000-0003-2348-7563
Bui, Ha H.0000-0001-8071-5433
Andrade, José E.0000-0003-3741-0364
Additional Information:© 2022 ICE Publishing. Manuscript received 3 April 2020; revised manuscript accepted 12 November 2020. Published online ahead of print 18 March 2021. The authors gratefully acknowledge support from the Australian Research Council by way of Discovery Projects FT140100408 (Nguyen), DP170103793 (Nguyen, Bui and Andrade) and DP190102779 (Bui and Nguyen).
Funders:
Funding AgencyGrant Number
Australian Research CouncilFT140100408
Australian Research CouncilDP170103793
Australian Research CouncilDP190102779
Subject Keywords:constitutive relations; plasticity; strain; stress path
Issue or Number:7
DOI:10.1680/jgeot.20.p.105
Record Number:CaltechAUTHORS:20220715-744243000
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20220715-744243000
Official Citation:Localised failure of geomaterials: how to extract localisation band behaviour from macro test data Linh A. Le, Giang D. Nguyen, Ha H. Bui, and José E. Andrade Géotechnique 2022 72:7, 596-609
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:115645
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:21 Jul 2022 22:49
Last Modified:21 Jul 2022 22:49

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