Principal stress rotation as cause of cyclic mobility

JefferiesMichael,; ShuttleDawn,; BeenKen,

doi:10.1680/jgere.15.00002

Cited by 23 publications

(2 citation statements)

References 38 publications

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“…The characteristic featuresfor example, h IS and PTare assumed to be dependent on soil states with respect to CSL. Therefore, simple functional forms are suggested for such states with respect to CSL that can be measured from a laboratory triaxial test or estimated from a field test (Chu et al, 2015;Shuttle and Jefferies, 2016) and also incorporated into constitutive modelling (Imam et al, 2002;Ishihara, 1993;Jefferies et al, 2015;Li and Dafalias, 2000).…”

Section: Introductionmentioning

confidence: 99%

The effect of consolidation on undrained behaviour of granular materials: experiment and DEM simulation

Rahman

Nguyen

Rabbi

2018

Geotechnical Research

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The characteristic features of undrained responses of granular materials, for example, stress ratio at instability (η IS) and phase transformation (η PT) states and the critical state (CS) behaviour, are often influenced by the consolidation history. However, there are limited studies in the literature, and a consensus has not yet been reached. This study combined the triaxial test of yellow silty sand and the three-dimensional discrete element method (DEM) simulation of ellipsoid particles under a triaxial condition to evaluate the effect of isotropic and K 0 consolidations. Triaxial test data formed non-unique CS lines (CSLs) in the e-log(p¢) space for isotropic and K 0 tests, whereas the CSL was unique for DEM simulations; where e and p¢ are the void ratio and mean effective stress, respectively. The micromechanical quantities, coordination number (C N) and fabric anisotropy (F vM) at the CS, also showed a unique relation with p¢. The characteristic features, η IS and η PT , showed good correlation with the state parameter (x) and the density indices. It was found that the g IS decreased with x, and the correlation was dependent on consolidation type. The micromechanical analysis suggested that F vM is a better parameter than C N to characterise the macromechanical behaviour. This study unambiguously supports the applicability of CS theory and provides insights into micromechanics of granular materials.

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Section: Introductionmentioning

confidence: 99%

The effect of consolidation on undrained behaviour of granular materials: experiment and DEM simulation

Rahman

Nguyen

Rabbi

2018

Geotechnical Research

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“…The understanding of constitutive laws through partial/complete success/failure helps us to deal with complicated problems in soil mechanics -for example, liquefaction mitigation -and Geotechnical Research welcomes such effort. I would like to draw readers' attention in this regard to a previously published article in Geotechnical Research by Jefferies et al (2015) for a better understanding of cyclic mobility behaviour during liquefaction.…”

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confidence: 99%