Academic Commons

Articles

Computational thermo-hydro-mechanics for multiphase freezing and thawing porous media in the finite deformation range

Na, SeonHong; Sun, WaiChing

A stabilized thermo-hydro-mechanical (THM) finite element model is introduced to investigate the freeze–thaw action of frozen porous media in the finite deformation range. By applying the mixture theory, frozen soil is idealized as a composite consisting of three phases, i.e., solid grain, unfrozen water and ice crystal. A generalized hardening rule at finite strain is adopted to replicate how the elasto-plastic responses and critical state evolve under the influence of phase transitions and heat transfer. The enhanced particle interlocking and ice strengthening during the freezing processes and the thawing-induced consolidation at the geometrical nonlinear regimes are both replicated in numerical examples. The numerical issues due to lack of two-fold inf–sup condition and ill-conditioning of the system of equations are addressed. Numerical examples for engineering applications at cold region are analyzed via the proposed model to predict the impacts of changing climate on infrastructure at cold regions.

Files

  • thumnail for 1-s2.0-S0045782516311240-main__2_.pdf 1-s2.0-S0045782516311240-main__2_.pdf application/pdf 4.53 MB Download File

Also Published In

Title
Computer Methods in Applied Mechanics and Engineering
DOI
https://doi.org/10.1016/j.cma.2017.01.028

More About This Work

Academic Units
Civil Engineering and Engineering Mechanics
Published Here
March 8, 2017
Academic Commons provides global access to research and scholarship produced at Columbia University, Barnard College, Teachers College, Union Theological Seminary and Jewish Theological Seminary. Academic Commons is managed by the Columbia University Libraries.