The constitutive modelling of London Clay

Yeow, Hoe-Chian; Coop, M. R.

doi:10.1680/jgeen.15.00146

Cited by 12 publications

(2 citation statements)

References 38 publications

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“…Different versions of the BRICK model are reported in the literature giving satisfactory results in various FE computations, e.g. [9,11,14,23,25,40,43]. The original BRICK model [38] has been developed in plane strain for which volumetric strain and shear strain are appropriate axes-the sides of the room where the described pulling process takes place.…”

Section: Hs-brick Formulationmentioning

confidence: 99%

Refinement of the Hardening Soil model within the small strain range

Cudny

Truty

2020

Acta Geotech.

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The popularity of the elasto-plastic Hardening Soil (HS) model is based on simple parameter identification from standard testing and empirical formulas. The HS model is implemented in many commercial FE codes designed to analyse geotechnical problems. In its basic version, the stress-strain behaviour within the elastic range is subject to the hypoelastic power law, which assures the barotropy of the elastic stiffness. However, a proper modelling within the small strain range, i.e. strain-induced stiffness degradation and correct reproduction of the hysteretic behaviour, was one of the most important drawbacks in the HS formulation. The first small strain stiffness extension to the HS model was proposed by Benz (Small strain stiffness of soils and its numerical consequences, 2007), and the new model was called Hardening Soil Small (HSS). Despite the simple isotropic formulation, its applicability was proved in various numerical simulations in geotechnics. However, the HSS formulation exhibits a serious fault known in the literature as overshooting, i.e. uncontrolled reset of the loading memory after tiny unloading-reloading cycles. The authors' main aim was to retain the set of material parameters for the HSS formulation and to propose a new small strain extension to the HS model without overshooting. The new proposal is based on the BRICK model which represents the concept of nested yield surfaces in strain space. The implementation aspects of the new HS-Brick model are described, and its performance is presented in some element tests and selected boundary value problems by comparisons with the HSS formulation.

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Section: Hs-brick Formulationmentioning

confidence: 99%

Refinement of the Hardening Soil model within the small strain range

Cudny

Truty

2020

Acta Geotech.

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“…In the first paper of this issue, Yeow and Coop (2017) show how relatively simple modifications of advanced soil models for London Clay, which capture the anisotropy of small strain stiffness, can significantly improve settlement predictions. This is of particular relevance for serviceability limit state design, which is becoming increasingly important.…”

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confidence: 99%