Quasi-bond finite element method for fracture problem of quasi-brittle rocks
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(1.Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China;2.CAEA Innovation Center on Geological Disposal of High Level Radioactive Waste, Beijing Research Institute of Uranium Geology, Beijing 100029, China )

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TU45

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    Abstract:

    Given the fact that computational effort and memory requirements are considerable when applying the quasi-bond method (QBM) to structural analyses, this paper introduces a hybrid numerical method combining QBM and the classical finite element method for modeling and simulating deformation and crack evolution in quasi-brittle materials. The proposed approach, referred to as QBFEM, utilizes linear elements for spatial discretization of structures. Cracked material regions and potential damage zones are designated as quasi-bond analysis domains where continuous-discontinuous solutions are performed, while non-damaged zones are solved using the finite element method without involving any coupling regions along the QBM-FEM transition zones. Subsequently, several tests of stiffness matrix assembling by both QBM and QBFEM for different meshes were conducted to demonstrate the efficiency of QBFEM. Finally, three numerical examples-plate with a single hole under tension, single crack plate under shear, and undamaged gravity dam under hydrostatic pressure-are provided for validation, which demonstrate that QBFEM can effectively capture the initiation and propagation of Mode I fracture in solid materials.

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朱其志,刘武,赵星光,等.准脆性岩石断裂问题的准键有限元法[J].河海大学学报(自然科学版),2025,53(2):78-87, 106.(ZHU Qizhi, LIU Wu, ZHAO Xingguang, et al. Quasi-bond finite element method for fracture problem of quasi-brittle rocks[J]. Journal of Hohai University (Natural Sciences),2025,53(2):78-87, 106.(in Chinese))

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History
  • Received:September 18,2024
  • Revised:
  • Adopted:
  • Online: March 26,2025
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