Phase-Field Modeling of Thermal Fracture and Shear Heating in Rocks with Degraded Thermal Conductivity Across Crack
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in: Acta mechanica solida Sinica, Jahrgang 37.2024, Nr. 5, 11.03.2024, S. 711-726.
Publikationen: Beitrag in Fachzeitschrift › Artikel › Forschung › (peer-reviewed)
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TY - JOUR
T1 - Phase-Field Modeling of Thermal Fracture and Shear Heating in Rocks with Degraded Thermal Conductivity Across Crack
AU - You, Tao
AU - Zhu, Qizhi
AU - Li, Weijian
AU - Shao, Jianfu
N1 - Publisher Copyright: © The Chinese Society of Theoretical and Applied Mechanics 2024.
PY - 2024/3/11
Y1 - 2024/3/11
N2 - 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.
AB - 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.
KW - Heat transfer
KW - Micromechanics
KW - Phase-field
KW - Shear heating
KW - Thermal conductivity degradation
UR - http://www.scopus.com/inward/record.url?scp=85187453118&partnerID=8YFLogxK
U2 - 10.1007/s10338-023-00452-6
DO - 10.1007/s10338-023-00452-6
M3 - Article
AN - SCOPUS:85187453118
VL - 37.2024
SP - 711
EP - 726
JO - Acta mechanica solida Sinica
JF - Acta mechanica solida Sinica
SN - 0894-9166
IS - 5
ER -