Continuum modelling of dynamic rock fracture under triaxial confinement
Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Scientific › peer-review
Details
| Original language | English |
|---|---|
| Title of host publication | 14th International Conference on Fracture, Proceedings of ICF 14 |
| Subtitle of host publication | Rhodes, Greece, June 18-23, 2017 |
| Number of pages | 2 |
| Publication status | Published - 2017 |
| Publication type | A4 Article in a conference publication |
| Event | International Conference on Fracture - Duration: 25 Aug 2017 → … |
Conference
| Conference | International Conference on Fracture |
|---|---|
| Period | 25/08/17 → … |
Abstract
This paper deals with numerical modelling of compressive fracture behavior of granite rock under high strain rate and wide range of confining pressure. For this end, a constitutive model based on damage mechanics and viscoplasticity is formulated and implemented in explicit dynamics FEM. Rock heterogeneity is characterized with the Weibull distribution. In the numerical examples, triaxial compression tests on Kuru granite at the strain rate of 600 1/s up to 225 MPa of confining pressure were simulated. Simulations show that the model captures the correct experimental failure modes, including the transition from single-to-multiple fragmentation, as well as the dynamic compressive strengths at different confining pressures.