模拟冻-融过程的热-水-应力耦合模型及数值分析

考虑低温条件下出现水-冰相变并有潜热产生的特点,将所开发的热-水-应力耦合模型及其二维有限元程序作了改进,使之可用于岩土体冻融问题的分析.并以Neaupane等的岩石室内冻一融试验为对象进行了数值模拟,将计算、试验和Neaupane的计算中所得的岩石试样上特定点的温度-时间曲线、温度-径向应变曲线作了对比,看到三者的接近程度较好,同时考察了本计算所得的一个岩石试样中不同时刻的温度、位移及应力分布,得出了若干结论.

COUPLED THERMO-HYDRO-MECHANICAL MODEL AND NUMERICAL ANALYSIS FOR SIMULATION OF FREEZING-THAWING PROCESS

Considering the phase change and latent heat production under the condition of low tempe-rature,the coupled thermo-hydro-mechanical model and 2D FEM code developed by the author are improved in this study for the purpose that they can be used for analysis of the freezing-thawing problem in soil and rock.To validate this model,numerical simulations on the freezing-thawing experiment by Neaupane et al are carried out here.Comparing the curves of temperature-time and temperature-radial strain at special points...