Phase-Field Modeling of Thermal Fracture and Shear Heating in Rocks with Degraded Thermal Conductivity Across Crack
Publikationen: Beitrag in Fachzeitschrift › Artikel › Forschung › (peer-reviewed)
Autoren
Organisationseinheiten
Externe Organisationseinheiten
- Hohai University, Nanjing
- Helmholtz Zentrum für Umweltforschung, Leipzig
- Shenzhen University
- University of Lille
Abstract
By incorporating two different fracture mechanisms and salient unilateral effects in rock materials, we propose a thermomechanical phase-field model to capture thermally induced fracture and shear heating in the process of rock failure. The heat conduction equation is derived, from which the plastic dissipation is treated as a heat source. We then ascertain the effect of the non-associated plastic flow on frictional dissipation and show how it improves the predictive capability of the proposed model. Taking advantage of the multiscale analysis, we propose a phase-field-dependent thermal conductivity with considering the unilateral effect of fracture. After proposing a robust algorithm for solving involved three-field coupling and damage-plasticity coupling problems, we present three numerical examples to illustrate the abilities of our proposed model in capturing various thermo-mechanically coupled behaviors.
Details
Originalsprache | Englisch |
---|---|
Seiten (von - bis) | 711-726 |
Seitenumfang | 16 |
Fachzeitschrift | Acta mechanica solida Sinica |
Jahrgang | 37.2024 |
Ausgabenummer | 5 |
DOIs | |
Status | Veröffentlicht - 11 März 2024 |