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Numerical manifold method for thermo-mechanical coupling simulation of fractured rock mass

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As a calculation method based on the Galerkin variation,the numerical manifold method(NMM)adopts a double covering system,which can easily deal with discontinuous deformation problems and has a high calculation accuracy.Aiming at the thermo-mechanical(TM)coupling problem of fractured rock masses,this study uses the NMM to simulate the processes of crack initiation and propagation in a rock mass under the influence of temperature field,deduces related system equations,and proposes a penalty function method to deal with boundary conditions.Numerical examples are employed to confirm the effectiveness and high accuracy of this method.By the thermal stress analysis of a thick-walled cylinder(TWC),the simulation of cracking in the TWC under heating and cooling conditions,and the simulation of thermal cracking of the Swedish Äspö Pillar Stability Experiment(APSE)rock column,the thermal stress,and TM coupling are obtained.The numerical simulation results are in good agreement with the test data and other numerical results,thus verifying the effectiveness of the NMM in dealing with thermal stress and crack propagation problems of fractured rock masses.

Heat conductionFractured rock massCrack propagationGalerkin variationNumerical manifold method(NMM)

Jiawei Liang、Defu Tong、Fei Tan、Xiongwei Yi、Junpeng Zou、Jiahe Lv

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Faculty of Engineering, China University of Geosciences, Wuhan 430074, China

Faculty of Engineering,China University of Geosciences,Wuhan,430074,China

Department of Civil Engineering,Monash University,Clayton,VIC,3800,Australia

Badong National Observation and Research Station of Geohazards,China University of Geoscience,Wuhan,430074,China

Badong National Observation and Research Station of Geohazards,China University of Geoscience,Wuhan 430074,China

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国家自然科学基金Fundamental Research Funds for the Central Universities,China University of Geosciences,WuhanNational Overseas Study Fund

42277165CUGCJ1821202106410040

2024

10.1016/j.jrmge.2023.07.020

岩石力学与岩土工程学报(英文版)
中国科学院武汉岩土力学所中国岩石力学与工程学会武汉大学

岩石力学与岩土工程学报(英文版)

CSTPCD
影响因子：0.404
ISSN：1674-7755
年,卷(期)：2024.16(6)