Abstract
Based on the theory of fracture mechanics, the influence of rock crack inclination angle on the crack initiation under uniaxial compression was analyzed.According to the mineral composition of granite, a meso particle flow model of three-phase structure including feldspar, quartz and mica was established to simulate the uniaxial compression failure process of granite under different crack inclination angle, and the mechanical characteristics of crack initiation, strength, stress-strain curve and failure mode of the granite were obtained.Research results show that the dominant crack angle of rock samples is 24°~30°, and these directional cracks can guide and promote the crack growth.The crack initiation stress and peak strength of granite show a trend of decreasing first and then increasing with the increase of crack inclination angle.When the crack inclination angle is 45°~60°, the strength of rock specimen is the lowest.The compression deformation of fractured granite specimen is mainly the deformation of fracture surface, and the macroscopic fracture surface formed by the connection and penetration of preexisting crack and new cracks leads to the failure of rock.The mineral composition ratio of granite has a certain influence on the strength of cracked granite.
| Translated title of the contribution | Meso multi-phase particle flow simulation of granite failure with preexisting crack |
|---|---|
| Original language | Chinese (Traditional) |
| Pages (from-to) | 79-85 |
| Number of pages | 7 |
| Journal | Huazhong Keji Daxue Xuebao (Ziran Kexue Ban)/Journal of Huazhong University of Science and Technology (Natural Science Edition) |
| Volume | 49 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 23 Apr 2021 |
Keywords
- crack propagation
- granite with crack
- minerals composition
- particle flow
- uniaxial compression