Peridynamic modelling of coupled THM behaviour of unsaturated frozen soils
Peridynamic modelling of coupled THM behaviour of unsaturated frozen soils
Modelling the thermal, hydraulic and mechanical behaviour (THM) of frozen soils is a complex and challenging task, because the transition behaviour of the water-ice phase is strongly non-linear due to abrupt changes of material properties and release of the latent heat. In addition, the frost heave and external loading may produce large deformation and potential cracking, i.e., generation of discontinuities into the domain of analysis. This paper presents a model for the coupled behaviour of frozen soils, developed based on a non-local approach to address strong non-linearities and discontinuities in this problem. Peridynamics formulations of heat transfer and water flow in porous media have been developed in the model presented. The accuracy of the model is discussed through the results of verification and validation exercises. The results demonstrate that the proposed approach can be used effectively to address the challenge of modelling and predicting the behaviour of freezing and thawing soils.
Petr Nikolaev; Majid Sedighi; Andrey Jivkov; Lee Margetts
10th European Conference on Numerical Methods in Geotechnical Engineering (NUMGE2023)
2. Finite element, finite difference, discrete element, material point and other methods
https://doi.org/10.53243/NUMGE2023-246
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