2022
DOI: 10.1155/2022/4052206
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An Investigation on Local Shearing Mechanisms of Irregular Dentate Rock Joints Using the PFC

Abstract: Joint surfaces are widely distributed in natural rock mass, and their shear mechanical properties play an important role in determining the safety and stability of rock mass. Previous studies rarely discussed the contribution degree of different joint protrusions to resisting shear stress. In this study, seven irregular dentate joint profiles were proposed to represent the geometric morphology of natural joints. Joint samples were subjected to direct shear tests under constant normal stress using the particle … Show more

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Cited by 6 publications
(3 citation statements)
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“…This study addressed these challenges by utilizing the ABAQUS, employing the method of global embedding of zero-thickness cohesive elements to accurately replicate the shear process of jointed rock mass with various roughness. The observations made in this study during the evolution of subtle fractures in the jointed rock closely resemble those found by Huan et al 58 , Bahaaddini et al 59 , Meng et al 60 , which used discrete element software PFC to observe microcrack propagation during shear. Taking Bahaaddini’s study 59 as an example, in which they investigated the degradation of roughness during shear and its impact on jointed rock shear behavior, in the pre-yielding stage, the model only generated small cracks, and when the shear stress reached the yielding shear stress, tensile cracks appeared at the protrusions.…”
Section: Discussion On the Test And Errorssupporting
confidence: 85%
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“…This study addressed these challenges by utilizing the ABAQUS, employing the method of global embedding of zero-thickness cohesive elements to accurately replicate the shear process of jointed rock mass with various roughness. The observations made in this study during the evolution of subtle fractures in the jointed rock closely resemble those found by Huan et al 58 , Bahaaddini et al 59 , Meng et al 60 , which used discrete element software PFC to observe microcrack propagation during shear. Taking Bahaaddini’s study 59 as an example, in which they investigated the degradation of roughness during shear and its impact on jointed rock shear behavior, in the pre-yielding stage, the model only generated small cracks, and when the shear stress reached the yielding shear stress, tensile cracks appeared at the protrusions.…”
Section: Discussion On the Test And Errorssupporting
confidence: 85%
“…After completing the laboratory tests, numerical simulations can further verify the correctness of the test results. The numerical simulations by Huan et al 58 , Bahaaddini et al 59 , Meng et al 60 , and Han et al 62 show a good consistence with test data. However, the simulated data in this tests show some deviations from the displacement-stress curve obtained in the lab tests.…”
Section: Discussion On the Test And Errorsmentioning
confidence: 73%
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