Abstract
Within the framework of mixture theory, an elastic-plastic-damage constitutive model is developed for water-saturated granite. Self-consistent method is adopted to describe the micro-structure of the multi-phase mixture, and the evolution of volume fraction is related to apparent deformation gradient based on the investigation of the coupling compressibility of rock mass and water. Biot's effective stress principle is employed in the description of the effect of water pressure on the strength of saturated rock, and the yield function is defined in Biot's effective stress space. The evolution of micropore represents inelastic volumetric deformation and its effect on material strength is also included in yield function. Numerical simulations on underground nuclear explosion are carried out by implementing the constitutive model in FDM. The characteristics of stress waves and the influences of water content of saturated granite are studied in a series of cases.
| Original language | English |
|---|---|
| Pages (from-to) | 880-886 |
| Number of pages | 7 |
| Journal | Jisuan Lixue Xuebao/Chinese Journal of Computational Mechanics |
| Volume | 24 |
| Issue number | 6 |
| State | Published - Dec 2007 |
| Externally published | Yes |
Scopus Subject Areas
- Computational Mechanics
- Modeling and Simulation
- Applied Mathematics
Keywords
- Constitutive model
- Effective stress principle
- Numerical simulation
- Underground explosion waves
- Water-saturated granite