Abstract
A cohesive fracture model that combines tension, compression and shear material behaviour is implemented into the hybrid continuum-discrete element method, i.e. Universal Distinct Element Code (UDEC), to simulate fracturing process in rock dynamic tests. The fracture model considers both elastic and inelastic (decomposed to fracture and plastic) displacements, with the norm of the effective inelastic displacement used to control the fracture behaviour. Two numerical examples, including notched semi-circular bending and Brazilian disc tests, are conducted to verify the applicability of the model in simulating the dynamic failure of rocks. Results show that the proposed approach is capable of realistically simulating the load rate effects on the mechanical behaviour of rock materials subjected to dynamic loads.
Original language | English |
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Pages (from-to) | 146-155 |
Number of pages | 10 |
Journal | International Journal of Impact Engineering |
Volume | 87 |
DOIs | |
Publication status | Published - 2016 Jan 1 |
Keywords
- Brazilian disc test
- Cohesive fracture model
- Dynamic failure
- Mixed-mode
- Notched semi-circular bending
ASJC Scopus subject areas
- Civil and Structural Engineering
- Automotive Engineering
- Aerospace Engineering
- Safety, Risk, Reliability and Quality
- Ocean Engineering
- Mechanics of Materials
- Mechanical Engineering