Phase-field fracture modelling of crack nucleation and propagation in porous rock
(2020) In International Journal of Fracture- Abstract
In this work, we suggest a modified phase-field model for simulating the evolution of mixed mode fractures and compressive driven fractures in porous artificial rocks and Neapolitan Fine Grained Tuff. The numerical model has been calibrated using experimental observations of rock samples with a single saw cut under uniaxial plane strain compression. For the purpose of validation, results from the numerical model are compared to Meuwissen samples with different angles of rock bridge inclination subjected to uni-axial compression. The simulated results are compared to experimental data, both qualitatively and quantitatively. It is shown that the proposed model is able to capture the emergence of shear cracks between the notches observed... (More)
In this work, we suggest a modified phase-field model for simulating the evolution of mixed mode fractures and compressive driven fractures in porous artificial rocks and Neapolitan Fine Grained Tuff. The numerical model has been calibrated using experimental observations of rock samples with a single saw cut under uniaxial plane strain compression. For the purpose of validation, results from the numerical model are compared to Meuwissen samples with different angles of rock bridge inclination subjected to uni-axial compression. The simulated results are compared to experimental data, both qualitatively and quantitatively. It is shown that the proposed model is able to capture the emergence of shear cracks between the notches observed in the Neapolitan Fine Grained Tuff samples as well as the propagation pattern of cracks driven by compressive stresses observed in the artificial rock samples. Additionally, the typical types of complex crack patterns observed in experimental tests are successfully reproduced, as well as the critical loads.
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- author
- Spetz, Alex LU ; Denzer, Ralf LU ; Tudisco, Erika LU and Dahlblom, Ola LU
- organization
- publishing date
- 2020-03-30
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Crack nucleation and propagation, Meuwissen sample, Phase-field fracture model, Porous rock
- in
- International Journal of Fracture
- publisher
- Springer
- external identifiers
-
- scopus:85083095334
- ISSN
- 0376-9429
- DOI
- 10.1007/s10704-020-00444-4
- language
- English
- LU publication?
- yes
- id
- cd9901ad-4881-478e-8f99-bed130344d46
- date added to LUP
- 2020-04-24 17:17:17
- date last changed
- 2022-04-18 21:51:04
@article{cd9901ad-4881-478e-8f99-bed130344d46, abstract = {{<p>In this work, we suggest a modified phase-field model for simulating the evolution of mixed mode fractures and compressive driven fractures in porous artificial rocks and Neapolitan Fine Grained Tuff. The numerical model has been calibrated using experimental observations of rock samples with a single saw cut under uniaxial plane strain compression. For the purpose of validation, results from the numerical model are compared to Meuwissen samples with different angles of rock bridge inclination subjected to uni-axial compression. The simulated results are compared to experimental data, both qualitatively and quantitatively. It is shown that the proposed model is able to capture the emergence of shear cracks between the notches observed in the Neapolitan Fine Grained Tuff samples as well as the propagation pattern of cracks driven by compressive stresses observed in the artificial rock samples. Additionally, the typical types of complex crack patterns observed in experimental tests are successfully reproduced, as well as the critical loads.</p>}}, author = {{Spetz, Alex and Denzer, Ralf and Tudisco, Erika and Dahlblom, Ola}}, issn = {{0376-9429}}, keywords = {{Crack nucleation and propagation; Meuwissen sample; Phase-field fracture model; Porous rock}}, language = {{eng}}, month = {{03}}, publisher = {{Springer}}, series = {{International Journal of Fracture}}, title = {{Phase-field fracture modelling of crack nucleation and propagation in porous rock}}, url = {{http://dx.doi.org/10.1007/s10704-020-00444-4}}, doi = {{10.1007/s10704-020-00444-4}}, year = {{2020}}, }