Unsaturated soil dynamics: Finite element solution including stress-induced anisotropy

In this paper, we present a novel framework for solving boundary and initial-value problems involving multiphase granular soils under monotonic, cyclic, and dynamic loads. To achieve this, a constitutive model was developed using the concept of loading surface that allows the development of a stress...

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Bibliographic Details
Published in:Computers and geotechnics 2021-05, Vol.133, p.104062, Article 104062
Main Authors: Ghorbani, Javad, Airey, David W., Carter, John P., Nazem, Majid
Format: Article
Language:English
Subjects:
Anisotropy
Boundary value problems
Constitutive model
Constitutive models
Cyclic
Cyclic loading
Cyclic loads
Drying
Dynamic loads
Finite element
Frameworks
Impact
Impact loads
Loads (forces)
Mathematical models
Soil
Soil dynamics
Stress
Unsaturated soil dynamics
Unsaturated soils
Wetting
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Summary:In this paper, we present a novel framework for solving boundary and initial-value problems involving multiphase granular soils under monotonic, cyclic, and dynamic loads. To achieve this, a constitutive model was developed using the concept of loading surface that allows the development of a stress integration scheme with less algorithmic complexity compared to its counterparts developed for the models that involve a yield or bounding surface. The developed model was implemented in a fully coupled framework to tackle several challenging issues in the numerical modelling of granular soils, including induced anisotropy and the response in scenarios including elevated stress levels, cyclic loading, during wetting and drying reversals, and under impact loads. Several numerical examples are presented, providing verification of the approach, and demonstrating the capabilities of the proposed solution framework.
ISSN:0266-352X
1873-7633
DOI:10.1016/j.compgeo.2021.104062