Modeling of chemo-hydromechanical behavior of unsaturated porous media: a nonlocal approach based on integral equations

Modeling of chemo-hydromechanical behavior of unsaturated porous media: a nonlocal approach based... Unsaturated clay is a heterogeneous porous medium consisting of three phases, namely solid soil skeleton, pore water, and pore air. It has been well recognized that the variation of the chemical property of pore fluid in clay can affect the hydromechanical behavior of this material remarkably. In this study, we formulate a non-local chemo-hydromechanical model for unsaturated clay via the constitutive correspondence principle in the state-based peridynamics—a reformulation of classical continuum mechanics using integral equations instead of partial differential equations. We numerically implement this non-local constitutive model through the implicit return mapping algorithm at the material particle level and then integrate the material subroutine into a computational peridynamics code. We conduct a series of numerical simulations of unsaturated clay samples under different chemical loading rates. The numerical results demonstrate that the proposed non-local model can capture the dramatic impact of organic chemicals on the mechanical behavior of unsaturated clay. The numerical results also show that the proposed non-local numerical model can simulate localized deformation in chemically active unsaturated clay because of the intrinsic length scale embedded in the integral equations. Keywords Chemo-plasticity  Integral equations  Peridynamics  Return mapping  Unsaturated clay 1 Introduction fluid. Sridharan et al. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Acta Geotechnica Springer Journals

Modeling of chemo-hydromechanical behavior of unsaturated porous media: a nonlocal approach based on integral equations

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Publisher
Springer Journals
Copyright
Copyright © 2018 by Springer-Verlag GmbH Germany, part of Springer Nature
Subject
Engineering; Geoengineering, Foundations, Hydraulics; Continuum Mechanics and Mechanics of Materials; Geotechnical Engineering & Applied Earth Sciences; Soil Science & Conservation; Soft and Granular Matter, Complex Fluids and Microfluidics; Structural Mechanics
ISSN
1861-1125
eISSN
1861-1133
D.O.I.
10.1007/s11440-018-0679-9
Publisher site
See Article on Publisher Site

Abstract

Unsaturated clay is a heterogeneous porous medium consisting of three phases, namely solid soil skeleton, pore water, and pore air. It has been well recognized that the variation of the chemical property of pore fluid in clay can affect the hydromechanical behavior of this material remarkably. In this study, we formulate a non-local chemo-hydromechanical model for unsaturated clay via the constitutive correspondence principle in the state-based peridynamics—a reformulation of classical continuum mechanics using integral equations instead of partial differential equations. We numerically implement this non-local constitutive model through the implicit return mapping algorithm at the material particle level and then integrate the material subroutine into a computational peridynamics code. We conduct a series of numerical simulations of unsaturated clay samples under different chemical loading rates. The numerical results demonstrate that the proposed non-local model can capture the dramatic impact of organic chemicals on the mechanical behavior of unsaturated clay. The numerical results also show that the proposed non-local numerical model can simulate localized deformation in chemically active unsaturated clay because of the intrinsic length scale embedded in the integral equations. Keywords Chemo-plasticity  Integral equations  Peridynamics  Return mapping  Unsaturated clay 1 Introduction fluid. Sridharan et al.

Journal

Acta GeotechnicaSpringer Journals

Published: May 30, 2018

References

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