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Phase-field fracture modelling of crack nucleation and propagation in porous rock

Spetz, Alex LU ; Denzer, Ralf LU ; Tudisco, Erika LU orcid and Dahlblom, Ola LU (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
; ; and
organization
publishing date
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}},
}