| Autor: |
Li, Guanghe, Wang, Yanting, Wang, Dong, Yang, Xiaoxu, Yang, Shaopu, Zhang, Shipeng, Li, Cunjin, Teng, Ruixue |
| Zdroj: |
Mechanics of Time-Dependent Materials; Jun2023, Vol. 27 Issue 2, p291-305, 15p |
| Abstrakt: |
In this paper, we investigated the time-dependent strain in a rock under different moisture contents for analysis of its long-term stability for water-bearing application in geotechnical engineering. We connected an elastomer, a viscoelastic element, an improved Maxwell element, and a nonlinear dashpot in series to construct a model for the unsteady creep of a rock under different moisture contents. We derived the one- and three-dimensional creep equations. Triaxial creep data were used to determine the model parameters, and also to validate the model. The results show that the unsteady creep model can accurately describe the rock deformation in both the decay and constant creep stages under different moisture contents. In addition, the model can describe the time-dependent strain in accelerated creep. The shear modulus and viscosity coefficient were found to follow a power function relationship with the moisture content; the shear modulus of the improved Maxwell element decreased with the increase of the moisture content; the viscosity coefficient of the improved Maxwell element had an exponential relationship with the moisture content. These results provide a theoretical basis for determining the long-term stability and deformation behavior of water-bearing rocks in geotechnical engineering. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
Full text from SpringerLink