首页|An extended micromechanical-based plastic damage model for understanding water effects on quasi-brittle rocks

An extended micromechanical-based plastic damage model for understanding water effects on quasi-brittle rocks

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Water effects on the mechanical properties of rocks have been extensively investigated through experi-ments and numerical models.However,few studies have established a comprehensive link between the microscopic mechanisms of water-related micro-crack and the constitutive behaviors of rocks.In this work,we shall propose an extended micromechanical-based plastic damage model for understanding weakening effect induced by the presence of water between micro-crack's surfaces on quasi-brittle rocks,based on the Mori-Tanaka homogenization and irreversible thermodynamics framework.Regarding the physical mechanism,water strengthens micro-crack propagation,which induces damage evolution dur-ing the pre-and post-stage,and weakens the elastic effective properties of rock matrix.After proposing a special calibration procedure for the determination of model parameters based on the laboratory com-pression tests,the proposed micromechanical-based model is verified by comparing the model predic-tions to the experimental results.The model effectively captures the mechanical behaviors of quasi-brittle rocks subjected to the weakening effects of water.

WaterMicro-crackDamageMicro-mechanicsConstitutive modelCohesive force

Qiaojuan Yu、Shigui Du、Qizhi Zhu、Zhanyou Luo、Sili Liu、Lunyang Zhao

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Institute of Rock Mechanics,Ningbo University,Ningbo 315211,China

Ningbo Key Laboratory of Energy Geostructure,Ningbo University,Ningbo 315211,China

College of Civil and Transportation Engineering,Hohai University,Nanjing 210098,China

College of Civil Engineering,Jiangsu Open University,Nanjing 210036,China

South China Institution of Geotechnical Engineering,School of Civil Engineering and Transportation,South China University of Technology,Guangzhou 510641,China

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国家自然科学基金国家自然科学基金General Scientific Research Fund of Zhejiang Provincial Education DepartmentUniversity Natural Science Foundation of Jiangsu Province

4200105342277147Y20235236323KJD130001

2024

10.1016/j.ijmst.2024.02.006

矿业科学技术学报(英文版)
中国矿业大学

矿业科学技术学报(英文版)

CSTPCDEI
影响因子：1.222
ISSN：2095-2686
年,卷(期)：2024.34(3)
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