Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Strength Homogenization for Partially Frozen Soil using Linear Comparison Composite Approach
Adopting the linear comparison composite (LCC) method within the framework of yield design theory [1], this paper presents a novel multi-scale strength homogenization procedure for a three-phase, partially-frozen soil composite where the solid particle phase (S) and the crystal ice phase (C) are assumed to be characterized by two different Drucker-Prager strength criteria and the liquid water phase (L) has zero shear strength capacity. Based upon a multi-scale thought model shown in Fig. 1, the macroscopic strength criterion for partially frozen soil can be upscaled through a two-step homogenization process. For each step, the LCC methodology is implemented by estimating the strength criterion of a two-phase nonlinear matrix-inclusion composite in terms of an optimally chosen linear thermo-elastic comparison composite with a similar underlying microstructure. In addition, the pressure melting of ice is considered in this model by incorporating a temperature and pressure dependent phase transition between ice and water. The predicted macroscopic strength criterion for partially frozen soil shows qualitatively a good agreement with observed phenomena, such as strengthening of soil during freezing and weakening of soil during pressure melting.
Strength Homogenization for Partially Frozen Soil using Linear Comparison Composite Approach
Adopting the linear comparison composite (LCC) method within the framework of yield design theory [1], this paper presents a novel multi-scale strength homogenization procedure for a three-phase, partially-frozen soil composite where the solid particle phase (S) and the crystal ice phase (C) are assumed to be characterized by two different Drucker-Prager strength criteria and the liquid water phase (L) has zero shear strength capacity. Based upon a multi-scale thought model shown in Fig. 1, the macroscopic strength criterion for partially frozen soil can be upscaled through a two-step homogenization process. For each step, the LCC methodology is implemented by estimating the strength criterion of a two-phase nonlinear matrix-inclusion composite in terms of an optimally chosen linear thermo-elastic comparison composite with a similar underlying microstructure. In addition, the pressure melting of ice is considered in this model by incorporating a temperature and pressure dependent phase transition between ice and water. The predicted macroscopic strength criterion for partially frozen soil shows qualitatively a good agreement with observed phenomena, such as strengthening of soil during freezing and weakening of soil during pressure melting.
Strength Homogenization for Partially Frozen Soil using Linear Comparison Composite Approach
Zhou, M.-M. (Autor:in) / Meschke, G. (Autor:in)
Fifth Biot Conference on Poromechanics ; 2013 ; Vienna, Austria
Poromechanics V ; 560-568
18.06.2013
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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