| Title: |
Discrete/finite element modelling of rock cutting with a TBM disc cutter |
| Authors: |
Labra, C.; Rojek, Jerzy; Oñate Ibáñez de Navarra, Eugenio |
| Contributors: |
Universitat Politècnica de Catalunya. Departament d'Enginyeria Civil i Ambiental; Centre Internacional de Mètodes Numèrics en Enginyeria; Universitat Politècnica de Catalunya. GMNE - Grup de Mètodes Numèrics en Enginyeria |
| Publication Year: |
2017 |
| Collection: |
Universitat Politècnica de Catalunya, BarcelonaTech: UPCommons - Global access to UPC knowledge |
| Subject Terms: |
Àrees temàtiques de la UPC::Matemàtiques i estadística::Anàlisi numèrica::Mètodes en elements finits; Àrees temàtiques de la UPC::Enginyeria civil::Geotècnia::Túnels i excavacions; Tunneling--Mathematical models; rock cutting; disc cutters; TBM; numerical model; discrete/¿nite element method; simulation; Túnels -- Construcció -- Models matemàtics |
| Description: |
The final publication is available at Springer via http://dx.doi.org/10.1007/s00603-016-1133-7 ; This paper presents advanced computer simulation of rock cutting process typical for excavation works in civil engineering. Theoretical formulation of the hybrid discrete/finite element model has been presented. The discrete and finite element methods have been used in different subdomains of a rock sample according to expected material behaviour, the part which is fractured and damaged during cutting is discretized with the discrete elements while the other part is treated as a continuous body and it is modelled using the finite element method. In this way, an optimum model is created, enabling a proper representation of the physical phenomena during cutting and efficient numerical computation. The model has been applied to simulation of the laboratory test of rock cutting with a single TBM (tunnel boring machine) disc cutter. The micromechanical parameters have been determined using the dimensionless relationships between micro- and macroscopic parameters. A number of numerical simulations of the LCM test in the unrelieved and relieved cutting modes have been performed. Numerical results have been compared with available data from in-situ measurements in a real TBM as well as with the theoretical predictions showing quite a good agreement. The numerical model has provided a new insight into the cutting mechanism enabling us to investigate the stress and pressure distribution at the tool–rock interaction. Sensitivity analysis of rock cutting performed for different parameters including disc geometry, cutting velocity, disc penetration and spacing has shown that the presented numerical model is a suitable tool for the design and optimization of rock cutting process. ; Peer Reviewed ; Postprint (published version) |
| Document Type: |
article in journal/newspaper |
| File Description: |
18 p.; application/pdf |
| Language: |
English |
| Relation: |
http://link.springer.com/article/10.1007/s00603-016-1133-7; https://hdl.handle.net/2117/102088 |
| DOI: |
10.1007/s00603-016-1133-7 |
| Availability: |
https://hdl.handle.net/2117/102088; https://doi.org/10.1007/s00603-016-1133-7 |
| Rights: |
Open Access |
| Accession Number: |
edsbas.F5159AF4 |
| Database: |
BASE |