Micromechanically inspired investigation of cemented granular materials: part II - from experiments to modelling and back

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dc.contributor.authorTengattini, A.
dc.contributor.authorNguyen, G.D.
dc.contributor.authorViggiani, G.
dc.contributor.authorEinav, I.
dc.date.issued2023
dc.descriptionPublished online: 12 April 2022
dc.description.abstractThis paper presents an experimental and analytical/numerical study of the mechanics of cemented granular materials (CGMs). This study incorporates both in situ X-ray tomography and regularised finite element simulations, whose combination offers a unique, complementary insight into the multiscale processes that drive the mechanical response of CGMs. Being the second in a set of a two-part contribution, this paper takes advantage of the image analysis tools developed in Part I to quantitatively explore the effects of boundary conditions on grain-scale processes as well as material properties. We reveal, for example, the influence of the degree of cementation on the spatial distribution of damage and suggest the existence of a local ultimate cement size distribution that is independent from the initial cement content. This paper also validates the predictions of a micromechanically inspired constitutive model at three different scales: in terms of the macroscopic response, the mesoscopic emergence of localisation patterns and the evolution of microscale inelastic processes. A unique feature that sets our model apart from previous CGM models is the adoption of only measurable internal variables, capable of representing grain-scale processes such as the damage of cement bridges. Its statistically representative experimental quantification is found to be in good agreement with the model predictions.
dc.description.statementofresponsibilityAlessandro Tengattini, Giang D. Nguyen, Gioacchino Viggiani, Itai Einav
dc.identifier.citationActa Geotechnica, 2023; 18(1):57-75
dc.identifier.doi10.1007/s11440-022-01476-x
dc.identifier.issn1861-1125
dc.identifier.issn1861-1133
dc.identifier.urihttps://hdl.handle.net/2440/135120
dc.language.isoen
dc.publisherSpringer
dc.relation.granthttp://purl.org/au-research/grants/arc/DP160104310
dc.relation.granthttp://purl.org/au-research/grants/arc/DP190103487
dc.rightsⒸ The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2022
dc.source.urihttps://doi.org/10.1007/s11440-022-01476-x
dc.subjectCemented granular materials
dc.subjectConstitutive modelling
dc.subjectDamage
dc.subjectLocalisation
dc.subjectTomography
dc.titleMicromechanically inspired investigation of cemented granular materials: part II - from experiments to modelling and back
dc.typeJournal article
pubs.publication-statusPublished

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