The field-enriched finite element method with gravity effects for simulating the cracking behaviors of large-scale engineering rock masses

IF 4.7 2区 工程技术 Q1 MECHANICS Engineering Fracture Mechanics Pub Date : 2024-10-18 DOI:10.1016/j.engfracmech.2024.110569
Xiaoping Zhou , Longfei Wang , Jinhui Zhang , Zheng Li , Yulin Zou
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Abstract

The field-enriched finite element method uses a scalar field defined as a field variable to describe cracks and characterize their impact on the displacement field and stress field of the solution model. It is capable of avoiding remeshing and employing level set functions to describe cracks when simulating the propagation of cracks. In this work, a field-enriched finite element model with gravity effects is proposed to simulate the large-scale failure process of engineering rock masses, and several numerical cases of geotechnical engineering are successfully analyzed. First, by introducing the unified tensile fracture criterion into the numerical model, the large-scale failure process of the intact slope is simulated. Second, the sliding process of rock slopes containing en echelon joints is numerically investigated. Third, the cracking process of the concrete dam is analyzed. Finally, the effects of joint and bedding plane inclination angles on the stability of tunnel chamber in transversely isotropic rock mass are studied. The numerical results indicate that the numerical method proposed in this work can accurately solve the large-scale failure process of rock masses.
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用于模拟大型工程岩体开裂行为的重力效应现场富集有限元法
场富集有限元法使用定义为场变量的标量场来描述裂纹,并描述裂纹对求解模型的位移场和应力场的影响。在模拟裂纹扩展时,它能够避免重网格化,并采用水平集函数来描述裂纹。本文提出了一种具有重力效应的场富集有限元模型来模拟工程岩体的大尺度破坏过程,并成功地分析了岩土工程中的几个数值案例。首先,通过在数值模型中引入统一拉伸断裂准则,模拟了完整边坡的大尺度破坏过程。其次,数值研究了含有梯形节理的岩石边坡的滑动过程。第三,分析了混凝土坝的开裂过程。最后,研究了节理和垫层平面倾角对横向各向同性岩体中隧道洞室稳定性的影响。数值结果表明,本文提出的数值方法可以精确地解决岩体的大规模破坏过程。
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来源期刊
CiteScore
8.70
自引率
13.00%
发文量
606
审稿时长
74 days
期刊介绍: EFM covers a broad range of topics in fracture mechanics to be of interest and use to both researchers and practitioners. Contributions are welcome which address the fracture behavior of conventional engineering material systems as well as newly emerging material systems. Contributions on developments in the areas of mechanics and materials science strongly related to fracture mechanics are also welcome. Papers on fatigue are welcome if they treat the fatigue process using the methods of fracture mechanics.
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