Model predictions for behaviors of sand-nonplastic-fines mixturesusing equivalent-skeleton void-ratio state index

Xiao, Yang; Sun, Yifei; Liu, Hanlong; Xiang, Junyi; Ma, Qianli; Long, Leihang

doi:10.1007/s11431-016-9024-9

Cited by 27 publications

(9 citation statements)

References 74 publications

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“…The grain shape of the silica sand is agular [8,9] while the EPS-bead shape is perfectly rounded, as can be seen from Figure 2(b). The bacteria solution in the optimum moisture content of 8.9% was added to the EPS-sand mixture in Figure 2(c).…”

mentioning

confidence: 76%

New lightweight geomaterials: Biocemented sand mixed with expanded polystyrene beads

Xiao

Liu

2017

Sci. China Technol. Sci.

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mentioning

confidence: 76%

New lightweight geomaterials: Biocemented sand mixed with expanded polystyrene beads

Xiao

Liu

2017

Sci. China Technol. Sci.

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“…Critical state lines in the

e - {(p^{'} / p_{a})}^{ξ}

and

e_{g}^{*} - {(p^{'} / p_{a})}^{ξ}

planes for sands with varying fines contents: (A) Xiao et al 59 37 …”

Section: Constitutive Frameworkmentioning

confidence: 99%

“…Comparisons between the simulation results and test data at

p_{c}^{'} =

100 kPa (Data from Xiao et al 59 q versus

ε_{a}

; (B)

ε_{v}

versus

ε_{a}

…”

Section: Numerical Validationmentioning

confidence: 99%

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Formulation and implementation of an elastoplastic constitutive model for sand‐fines mixtures

Sun

Chu

Xiao

2021

Num Anal Meth Geomechanics

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Sand‐fines mixtures are commonly used engineered materials, and their mechanical behavior is significantly affected by density, confining pressure, as well as fines content. Although many laboratory tests have been performed on sand‐fines mixtures, few works have been conducted on its constitutive law. To adequately describe the mechanical behavior of sand with different fines content, a novel elastoplastic constitutive model was developed for sand‐fines mixtures by incorporating an equivalent granular state parameter into Rowe's stress‐dilatancy equation, plastic modulus, and in conjunction with the correlation between the critical state and fines content. Subsequently, the Runge‐Kutta schemes with automatic error control are adopted for the proposed model and implemented in a finite element code. The performance of the fines‐state‐dependent model with the Runge‐Kutta schemes, in terms of accuracy, efficiency and convergence, is verified by analyzing element scale tests and boundary value problems. The comparisons of simulated and experimental results demonstrate that the fines‐state‐dependent model can effectively capture the strain hardening (or softening) and contraction (or dilatancy) behaviors of sand‐fines mixtures under drained conditions. In addition, the key features under undrained conditions, such as flow, limited flow, and non‐flow behaviors can also be reasonably reproduced.

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“…e main difference between a conventional static constitutive model and a dynamic one is that the latter can accurately delineate the hysteretic behaviour of the soil under dynamic loads [4,5]. At present, the existing constitutive models used in the geotechnical field to reveal the dynamics of soil under cyclic loads can be divided into three main types [6,7]: elastoplastic and viscoplastic dynamic constitutive models and transient modulus field models (based on transient-limit equilibrium theory).…”

Section: Introductionmentioning

confidence: 99%

A Hypoelastic Dynamic Constitutive Model to Account for the Hysteretic Behaviour of Soil Subjected to Cyclic Loads

Jianhua

Dai

et al. 2021

Advances in Civil Engineering

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To reduce the difficulties associated with dynamic constitutive models, a model was established for soil in this study based on hypoelasticity. The stress-strain relationship in soil under a cyclic load was divided into three stages: initial loading, unloading, and reloading. The stress-strain relationship in each stage was ascertained using a hyperbolic equation. On this basis, the physical significance of the parameters in the model and their method of determination were described. The effects of the parameters on the stress-strain relationship were investigated and the integration algorithm of the model was established. Finally, the rationality of the proposed model was verified by conducting triaxial tests under conventional and cyclic loads. The results show that the model is able to adequately demonstrate all the stress-strain relations in the soil under both static and dynamic loads.

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Model predictions for behaviors of sand-nonplastic-fines mixturesusing equivalent-skeleton void-ratio state index

Cited by 27 publications

References 74 publications

New lightweight geomaterials: Biocemented sand mixed with expanded polystyrene beads

New lightweight geomaterials: Biocemented sand mixed with expanded polystyrene beads

Formulation and implementation of an elastoplastic constitutive model for sand‐fines mixtures

A Hypoelastic Dynamic Constitutive Model to Account for the Hysteretic Behaviour of Soil Subjected to Cyclic Loads

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