Eighth International Conference on Case Histories in Geotechnical Engineering
Thermo-Mechanical Behavior of Saturated Clays Using Discrete Element Modelling
Publication: Geo-Congress 2019: Geotechnical Materials, Modeling, and Testing (GSP 310)
ABSTRACT
A discrete numerical model developed for cohesive soils was utilized to study the thermo-mechanical behavior of a saturated kaolinite. The physico-chemical interactions that exist between clay particles, mainly van der Waal attractive and double layer repulsive forces, were considered. Van der Waal attractive interaction was modelled based on the hybrid Hamaker-de Boer-Lifshitz approach. Further, double layer repulsive interaction was modelled based on the Gouy-Chapman theory. A brief discerption of the implementation in a discrete element framework is presented. Moreover, the effect of temperature variation on the inter-particle forces, mainly the double layer repulsive force, is discussed. Finally, the thermally-induced pore water pressure generated during undrained heating of a clay sample was studied and validated against experimental data. The findings suggest that incorporating temperature-dependent interparticle forces in DEM simulations of cohesive soils will allow understanding the underlying thermally-induced micro-structural changes providing another insights and explanations into the observed large-scale behaviors.
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ACKNOWLEDGMENTS
Research was sponsored by the Army Research Office and was accomplished under Grant Numbers W911NF-16-1-0336 and W911NF-18-1-0068. The views and conclusions contained in this document are those of the authors and should not be interpreted as representing the official policies, either expressed or implied, of the Army Research Office or the U.S. Government. The U.S. Government is authorized to reproduce and distribute reprints for Government purposes notwithstanding any copyright notation herein.
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Information & Authors
Information
Published In
Geo-Congress 2019: Geotechnical Materials, Modeling, and Testing (GSP 310)
Pages: 125 - 134
Editors: Christopher L. Meehan, Ph.D., University of Delaware, Sanjeev Kumar, Ph.D., Southern Illinois University Carbondale, Miguel A. Pando, Ph.D., University of North Carolina Charlotte, and Joseph T. Coe, Ph.D., Temple University
ISBN (Online): 978-0-7844-8212-4
Copyright
© 2019 American Society of Civil Engineers.
History
Published online: Mar 21, 2019
Published in print: Mar 21, 2019
ASCE Technical Topics:
- Clays
- Continuum mechanics
- Discrete element method
- Dynamics (solid mechanics)
- Engineering fundamentals
- Engineering mechanics
- Geomechanics
- Geotechnical engineering
- Measurement (by type)
- Methodology (by type)
- Models (by type)
- Numerical methods
- Numerical models
- Pressure (type)
- Saturated soils
- Soft soils
- Soil mechanics
- Soil properties
- Soils (by type)
- Solid mechanics
- Temperature effects
- Temperature measurement
- Thermal properties
- Thermodynamics
- Water pressure
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