The viscosity coefficients η 2 , η 3 are used to describe the ability of rock samples to resist deformation, and their values show an upward trend with the increase in the intermediate principal stress, which means that the increase in the intermediate principal stress inhibits the time-dependent deformation of the rock, so at the macro level, it is manifested as a decrease in the creep rate; meanwhile, the material parameter λ shows a decreasing trend with the increase in the intermediate principal stress. 5.
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A Chemical Damage Creep Model of Rock Considering the Influence of Triaxial Stress.
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