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- Publisher Website: 10.1016/j.cma.2020.113655
- Scopus: eid_2-s2.0-85099208618
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Article: Double-phase-field formulation for mixed-mode fracture in rocks
Title | Double-phase-field formulation for mixed-mode fracture in rocks |
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Authors | |
Keywords | Phase-field modeling Mixed-mode fracture Cohesive fracture Frictional fracture Rocks |
Issue Date | 2021 |
Publisher | Elsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/cma |
Citation | Computer Methods in Applied Mechanics and Engineering, 2021, v. 376, p. article no. 113655 How to Cite? |
Abstract | Cracking of rocks and rock-like materials exhibits a rich variety of patterns where tensile (mode I) and shear (mode II) fractures are often interwoven. These mixed-mode fractures are usually cohesive (quasi-brittle) and frictional. Although phase-field modeling is increasingly used for rock fracture simulation, no phase-field formulation is available for cohesive and frictional mixed-mode fracture. To address this shortfall, here we develop a double-phase-field formulation that employs two different phase fields to describe cohesive tensile fracture and frictional shear fracture individually. The formulation rigorously combines the two phase fields through three approaches: (i) crack-direction-based decomposition of the strain energy into the tensile, shear, and pure compression parts, (ii) contact-dependent calculation of the potential energy, and (iii) energy-based determination of the dominant fracturing mode in each contact condition. We validate the proposed model, both qualitatively and quantitatively, with experimental data on mixed-mode fracture in rocks. The validation results demonstrate that the double-phase-field model – a combination of two quasi-brittle phase-field models – allows one to directly use material strengths measured from experiments, unlike brittle phase-field models for mixed-mode fracture in rocks. Another standout feature of the double-phase-field model is that it can simulate, and naturally distinguish between, tensile and shear fractures without complex algorithms. |
Persistent Identifier | http://hdl.handle.net/10722/299104 |
ISSN | 2023 Impact Factor: 6.9 2023 SCImago Journal Rankings: 2.397 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | FEI, F | - |
dc.contributor.author | Choo, J | - |
dc.date.accessioned | 2021-04-28T02:26:14Z | - |
dc.date.available | 2021-04-28T02:26:14Z | - |
dc.date.issued | 2021 | - |
dc.identifier.citation | Computer Methods in Applied Mechanics and Engineering, 2021, v. 376, p. article no. 113655 | - |
dc.identifier.issn | 0045-7825 | - |
dc.identifier.uri | http://hdl.handle.net/10722/299104 | - |
dc.description.abstract | Cracking of rocks and rock-like materials exhibits a rich variety of patterns where tensile (mode I) and shear (mode II) fractures are often interwoven. These mixed-mode fractures are usually cohesive (quasi-brittle) and frictional. Although phase-field modeling is increasingly used for rock fracture simulation, no phase-field formulation is available for cohesive and frictional mixed-mode fracture. To address this shortfall, here we develop a double-phase-field formulation that employs two different phase fields to describe cohesive tensile fracture and frictional shear fracture individually. The formulation rigorously combines the two phase fields through three approaches: (i) crack-direction-based decomposition of the strain energy into the tensile, shear, and pure compression parts, (ii) contact-dependent calculation of the potential energy, and (iii) energy-based determination of the dominant fracturing mode in each contact condition. We validate the proposed model, both qualitatively and quantitatively, with experimental data on mixed-mode fracture in rocks. The validation results demonstrate that the double-phase-field model – a combination of two quasi-brittle phase-field models – allows one to directly use material strengths measured from experiments, unlike brittle phase-field models for mixed-mode fracture in rocks. Another standout feature of the double-phase-field model is that it can simulate, and naturally distinguish between, tensile and shear fractures without complex algorithms. | - |
dc.language | eng | - |
dc.publisher | Elsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/cma | - |
dc.relation.ispartof | Computer Methods in Applied Mechanics and Engineering | - |
dc.subject | Phase-field modeling | - |
dc.subject | Mixed-mode fracture | - |
dc.subject | Cohesive fracture | - |
dc.subject | Frictional fracture | - |
dc.subject | Rocks | - |
dc.title | Double-phase-field formulation for mixed-mode fracture in rocks | - |
dc.type | Article | - |
dc.identifier.email | Choo, J: jchoo@hku.hk | - |
dc.identifier.authority | Choo, J=rp02364 | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1016/j.cma.2020.113655 | - |
dc.identifier.scopus | eid_2-s2.0-85099208618 | - |
dc.identifier.hkuros | 322304 | - |
dc.identifier.volume | 376 | - |
dc.identifier.spage | article no. 113655 | - |
dc.identifier.epage | article no. 113655 | - |
dc.identifier.isi | WOS:000618127600006 | - |
dc.publisher.place | Netherlands | - |