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

Spetz, Alex (author): Lund University,Lunds universitet,Geoteknik,Institutionen för byggvetenskaper,Institutioner vid LTH,Lunds Tekniska Högskola,Geotechnical Engineering,Department of Construction Sciences,Departments at LTH,Faculty of Engineering, LTH

Denzer, Ralf (author): Lund University,Lunds universitet,Hållfasthetslära,Institutionen för byggvetenskaper,Institutioner vid LTH,Lunds Tekniska Högskola,Solid Mechanics,Department of Construction Sciences,Departments at LTH,Faculty of Engineering, LTH

Tudisco, Erika (author): Lund University,Lunds universitet,Geoteknik,Institutionen för byggvetenskaper,Institutioner vid LTH,Lunds Tekniska Högskola,Geotechnical Engineering,Department of Construction Sciences,Departments at LTH,Faculty of Engineering, LTH

Dahlblom, Ola (author): Lund University,Lunds universitet,Geoteknik,Institutionen för byggvetenskaper,Institutioner vid LTH,Lunds Tekniska Högskola,Geotechnical Engineering,Department of Construction Sciences,Departments at LTH,Faculty of Engineering, LTH

(creator_code:org_t)

2020-03-30
2020
English.
In: International Journal of Fracture. - : Springer Science and Business Media LLC. - 0376-9429 .- 1573-2673.

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Abstract Subject headings

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.

By the author/editor: Spetz, Alex; Denzer, Ralf; Tudisco, Erika; Dahlblom, Ola

About the subject

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Environmental En ...; and Geophysical Engi ...

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