A coupled constitutive model for modelling small strain behaviour of soils

Seyedan, Seyedmohammadjavad; Sołowski, Wojciech Tomasz

doi:10.1201/9781351003629-79

Cited by 2 publications

(2 citation statements)

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“…e first two terms in equation (18) relate to the elastic behaviour of small strain model, whereas the third term adds the deviatoric internal variable, ensuring correct calculation of the deviatoric strain. e remaining part of the function introduces the hardening behaviour during the small strain shearing.…”

Section: Hyperplastic Formulation Of the Small Strain Modelmentioning

confidence: 99%

“…is paper updates the procedure for enhancing elastoplastic constitutive models with nonlinear shear stressshear strain behaviour in the small strain range without changing other characteristics of the base models, first introduced in [18]. e presented algorithm preserves other features of the base constitutive model, including thermodynamic consistency.…”

Section: Introductionmentioning

confidence: 99%

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Enhancing Constitutive Models for Soils: Adding the Capability to Model Nonlinear Small Strain in Shear

Seyedan

Sołowski

2019

Advances in Civil Engineering

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The deviatoric stress-deviatoric strain relationship in soils is highly nonlinear, especially in the small strain range. However, the constitutive models which aim to replicate the small strain nonlinearity are often complex and rarely used in geotechnical engineering practice. The goal of this study is to offer a simple way for updating the existing constitutive models, widely used in geotechnical practice, to take into account the small strain shear modulus changes. The study uses an existing small strain relationship to derive a yield surface. When the yield surface is introduced to an existing soil model, it enhances the model with the nonlinear deviatoric stress-deviatoric strain relationship in the small strain range. The paper also gives an example of such a model enhancement by combining the new yield surface with the Modified Cam Clay constitutive model. The validation simulations of the undrained triaxial tests on London Clay and Ham River sand with the upgraded constitutive models replicate the experiments clearly better than the base models, without any changes to existing model parameters and the core source code associated with the base model.

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Section: Hyperplastic Formulation Of the Small Strain Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Enhancing Constitutive Models for Soils: Adding the Capability to Model Nonlinear Small Strain in Shear

Seyedan

Sołowski

2019

Advances in Civil Engineering

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Small Strains in Soil Constitutive Modeling

Castellón

Ledesma

2022

Arch Computat Methods Eng

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This paper reviews the state of the art of soil behavior in the range of small strains and its constitutive modeling, which is an important issue when predicting displacements under serviceability conditions. The factors that control nonlinear, hysteretic and dependent on recent history soil behavior are described. Likewise, concepts of soil constitutive modeling are explored in detail and two criteria are explained and used to classify the analyzed models: (1) a first criterion based on the concept of tensorial zones; and (2) a second criterion based on the elements that defines the hysteretic soil behavior, including reversal criteria, memory rules and the effects of reversals on soil degradation and on soil stiffness recovery. The fundamentals of the formulation of the analyzed models are provided, as well as their scope of application, advantages and disadvantages.

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A coupled constitutive model for modelling small strain behaviour of soils

Cited by 2 publications

References 1 publication

Enhancing Constitutive Models for Soils: Adding the Capability to Model Nonlinear Small Strain in Shear

Enhancing Constitutive Models for Soils: Adding the Capability to Model Nonlinear Small Strain in Shear

Small Strains in Soil Constitutive Modeling

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