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Numerical investigation of dynamic rock fragmentation in mechanical cutting using combined FEM/DEM
conference contribution
posted on 2023-05-23, 13:54 authored by Mohammadnejad, M, Hongyuan LiuHongyuan Liu, Dehkhoda, S, Andrew ChanAndrew ChanIn recent years, numerical simulations have been used widely for investigation of mechanical rock cutting. However, the capability of the modelling methods has yet remained open for question. In an attempt to address the shortcomings of the existing methods, this paper proposes a new extension of combined finite/discrete element method (FEM/DEM), which takes into account the mix-mode I-II fracture criteria for predicting the initiation and propagation of cracks. The code's ability in modelling rock fracture process is investigated by simulating fragmentation with a mechanical cutter. The model characterized the rock-tool interaction, computing the direction of crack growth leading to chip generation. The obtained results demonstrated the capability of the proposed combined FEM/DEM method in modelling mechanical rock cutting process. The code could successfully handle the chipping process, being able to model the stress concentration, crack initiation, crack propagation and chip separation.
Funding
CSIRO-Commonwealth Scientific & Industrial Research Organisation
History
Publication title
Proceedings of the 3rd Nordic Rock Mechanics Symposium, NRMS 2017Volume
11-12 October 2017Editors
E Johansson & V RaasakkaPagination
116-124ISBN
978-951-758-622-1Department/School
School of EngineeringPublisher
International Society for Rock Mechanics and Rock EngineeringPlace of publication
Lisbon, PortugalEvent title
3rd Nordic Rock Mechanics Symposium, NRMS 2017Event Venue
Helsinki, FinlandDate of Event (Start Date)
2017-10-11Date of Event (End Date)
2017-10-12Rights statement
Copyright unknownRepository Status
- Restricted