Phase-Field Modeling of Thermal Fracture and Shear Heating in Rocks with Degraded Thermal Conductivity Across Crack

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外文摘要：By incorporating two different fracture mechanisms and salient unilateral effects in rock materials,we propose a thermo-mechanical 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.

外文关键词：

Phase-fieldMicromechanicsHeat transferThermal conductivity degradationShear heating

作者：

Tao You、Qizhi Zhu、Weijian Li、Jianfu Shao

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作者单位：

Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering,Hohai University,Nanjing 210024,China

Department of Environmental Informatics,Helmholtz Centre for Environmental Research-UFZ,04318 Leipzig,Germany

College of Civil and Transportation Engineering,Hohai University,Nanjing 210024,China

College of Civil and Transportation Engineering,Shenzhen University,Shenzhen 518060,China

University of Lille,CNRS,Centrale Lille,LaMcube,UMR9013,F-59000 Lille,France

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出版年：

2024

DOI：

10.1007/s10338-023-00452-6

固体力学学报(英文版)

中国力学学会

固体力学学报(英文版)

影响因子：0.214

ISSN：0894-9166

年,卷(期)：2024.37(5)