Numerical simulation of water content dependent undrained shear strength of clays

Park, Sung-Sik; Doan, Nhat-Phi; Jeong, Sueng Won

doi:10.1080/1064119x.2019.1608604

Cited by 12 publications

(4 citation statements)

References 33 publications

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“…The incremental formulation of an elasto‐plastic constitutive model can be expressed as follows (Prevost, 19 Park et al., 20 Doan et al 21

\begin{equation}\left\{ {\Delta \sigma ^{\prime}} \right\} = \ \left[ D \right]\ \left\{ {\Delta {\varepsilon ^e}} \right\} = \ \left[ D \right]\left\{ {\left\{ {\Delta \varepsilon } \right\} - \left\{ {\Delta {\varepsilon ^p}} \right\}} \right\}\end{equation}

where

\{ {{{\Delta}}\sigma ^{\prime}} \}

= a vector of effective stress increments, [ D ] = an elastic stiffness matrix, and

\{ {{{\Delta}}\varepsilon } \}

\{ {{{\Delta}}{\varepsilon ^e}} \}

, and

\{ {{{\Delta}}{\varepsilon ^p}} \}

= vectors of total, elastic, and plastic strain increments, respectively.…”

Section: Formulation Of Ubcsand2mentioning

confidence: 99%

“…The incremental formulation of an elasto-plastic constitutive model can be expressed as follows (Prevost, 19 Park et al, 20 Doan et al 21 ):…”

Section: Formulation Of Ubcsand2mentioning

confidence: 99%

“…The plastic strain increments generated from the horizontal plane are phased-out as the principal stresses rotate. Therefore, 𝜆 2 is adjusted to 𝜆 * 2 as a function of cos 2α σ by Equation (20), where α σ is the angle between the direction of major principal stress and the vertical.…”

Section: Flow Rule On the Horizontal Plane And Phasing-out Functionmentioning

confidence: 99%

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Constitutive modeling of principal stress rotation associated with sand under simple shear loading

Park

Nong

Doan

2022

Num Anal Meth Geomechanics

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An elasto‐plastic constitutive model is proposed to account for the effect of principal stress rotation that commonly occurs and significantly influences soil behavior. The model is based on a concept of adding plastic strain increments obtained from two mobilized planes: a plane of maximum shear stress which swings as the principal stress rotates, and a horizontal plane which is spatially fixed. Models based on the plane of maximum shear stress alone are particularly sensitive to horizontal effective stress ratio K0 (=σ′x/σ′y), whereas the proposed model gives a similar skeleton behavior for soils at the same density and mean effective stress, regardless of the value of K0, as observed in laboratory tests. The model is firstly calibrated by data from drained and undrained monotonic and cyclic Direct Simple Shear (DSS) tests on K0‐consolidated specimens of Nakdong River sand in loose and dense states. The capability of the proposed model in modeling of the conventional liquefaction effects: initial shear stress condition α (=τ′xy/σ′y) with Kα corrections, and initial confining stress condition σ´y with Kσ corrections, is also emphasized in this paper.

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“…The incremental formulation of an elasto‐plastic constitutive model can be expressed as follows (Prevost, 19 Park et al., 20 Doan et al 21

\begin{equation}\left\{ {\Delta \sigma ^{\prime}} \right\} = \ \left[ D \right]\ \left\{ {\Delta {\varepsilon ^e}} \right\} = \ \left[ D \right]\left\{ {\left\{ {\Delta \varepsilon } \right\} - \left\{ {\Delta {\varepsilon ^p}} \right\}} \right\}\end{equation}

where

\{ {{{\Delta}}\sigma ^{\prime}} \}

= a vector of effective stress increments, [ D ] = an elastic stiffness matrix, and

\{ {{{\Delta}}\varepsilon } \}

\{ {{{\Delta}}{\varepsilon ^e}} \}

, and

\{ {{{\Delta}}{\varepsilon ^p}} \}

= vectors of total, elastic, and plastic strain increments, respectively.…”

Section: Formulation Of Ubcsand2mentioning

confidence: 99%

“…The incremental formulation of an elasto-plastic constitutive model can be expressed as follows (Prevost, 19 Park et al, 20 Doan et al 21 ):…”

Section: Formulation Of Ubcsand2mentioning

confidence: 99%

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Constitutive modeling of principal stress rotation associated with sand under simple shear loading

Park

Nong

Doan

2022

Num Anal Meth Geomechanics

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“…Ansari et al [23] used the CEL to simulate the complete process of the MVST. Park et al [24] developed a miniature vane shear test model to analyze the shear strength of sensitive soil samples with different water contents. Dey et al [25] used the CEL to explore the properties of sensitive clay in submarine layers and proposed the numerical model parameters for the sensitive clay.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigations of Undrained Shear Strength of Sensitive Clay Using Miniature Vane Shear Tests

Shen

Wang

Chen

et al. 2023

JMSE

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The laboratory miniature vane shear test (MVST) has been widely used to measure the undrained shear strength of marine sediments in offshore engineering. However, the transfer of the soil sample in tube samplers from the seabed to the laboratory releases the in situ confining stress acting on the soil and will decrease the soil strength. In this research, in order to investigate the effects of confining stress on the undrained shear strength of marine sediments, the Coupled Eulerian-Lagrangian (CEL) approach in ABAQUS is used to model the three-dimensional standard and miniature vane shear tests to estimate the undrained shear strength of sensitive clay with different sensitivities under various stress conditions. Based on the numerical simulation results, a linear strength model that not only considers confining stress effects but also can eliminate the size effects caused by vane blades of MVST is proposed. The proposed model can be used to estimate the undrained shear strength of the sensitive clay under shallow seabed surfaces.

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Effects of scour-hole dimensions and bulb positions on the lateral response of under-reamed pile in soft clay

Majumder

Chakraborty

2021

Applied Ocean Research

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Numerical simulation of water content dependent undrained shear strength of clays

Cited by 12 publications

References 33 publications

Constitutive modeling of principal stress rotation associated with sand under simple shear loading

Constitutive modeling of principal stress rotation associated with sand under simple shear loading

Numerical Investigations of Undrained Shear Strength of Sensitive Clay Using Miniature Vane Shear Tests

Effects of scour-hole dimensions and bulb positions on the lateral response of under-reamed pile in soft clay

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