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原文传递 Cryo-Mechanics of Unsaturated Frozen Soils During Freeze-Thaw Cycle.

题名：	Cryo-Mechanics of Unsaturated Frozen Soils During Freeze-Thaw Cycle.
作者：	Sun, W.; Li, L.
关键词：	Thawing, Freezing, Hydromechanics, Thermomechanics, Compression, Soils, Temperature, Pressure, Porosity, Stress strain relations, Permeability, Crystallization, Anisotropy, Water flow, Crack propagation, Deformation, Microstructure, Phase transformations, Freeze-thaw action, Thermohydromechanics, Geomechanics, Triaxial compression tests, Suction-control experiment, Critical state plasticity, Water retention, Cryo-deformation, Cryo-mechanics, Frozen soils, Stress anisotropy, Macroscopic thermal effect, Spatial heterogeneity, Phase transitions
摘要：	The objective of this DURIP research is to advance the fundamental understanding of the path dependent behaviors of soils during freeze-thaw cycles. An experimental triaxial cell system equipped with a climate control system and an unsaturated soil triaxial module will be used to vary temperature, axial and radial stresses, as well as air and water pressures of soils monotonically and cyclically. The stress-strain history, water retention behavior and relative permeability will be at various stages of loading cycles will be recorded. By examining the cryo-deformation of specimens subjected to various combinations of drainage conditions, degree of saturations and loading paths, this research will bring the much needed new insights on how crystallization and thawing of ice crystal inside the pore space affects the macroscopic responses of frozen soils. A large strain thermo-poro-plasticity constitutive model will be used in complement with this experimental research to develop validated theory that explains the thermo-hydro-mechanical responses frozen soil during freeze-thaw cycles.
报告类型：	科技报告