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由于湿度的作用与扩散的范围、时间有关,因此,湿度扩散造成的岩石力学性质劣化和变形随空间和时间而变化,这种变化是造成岩石流变的本源问题.从湿度扩散入手,通过引入湿度增加与材料力学参数弱化的物性关系,建立了湿度-应力-损伤耦合作用的岩石流变模型.试样蠕变和松弛效应的数值模拟结果再现了湿度扩散条件下岩石力学行为变化的时间效应.通过探讨本文的耦合作用流变模型与传统岩石流变模型之间的差异,进一步阐述了岩石流变行为的本源.
Because the role of humidity is related to the range and time of diffusion, the mechanical properties of rock deteriorate and the deformation changes with space and time, which is the origin of rock rheology.From the perspective of humidity diffusion, The relationship between the humidity and the weakening of the mechanical parameters of the rock is established and the rheological-rheological model of rock-soil coupling is established. The numerical simulation results of the creep and relaxation of the sample reproduce the time effect of rock mechanics behavior under humidity diffusion By discussing the difference between the coupled rheological model and the traditional rheological model, the origin of rock rheological behavior is further expounded.