Open Access

ARTICLE

RB-DEM Modeling and Simulation of Non-Persisting Rough Open Joints Based on the IFS-Enhanced Method

by Hangtian Song^1,2, Xudong Chen^1,2, Chun Zhu³, Qian Yin⁴, Wei Wang^1,2, Qingxiang Meng^1,2,*

1 Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing, 210098, China
2 Research Institute of Geotechnical Engineering, Hohai University, Nanjing, 210098, China
3 School of Earth Sciences and Engineering, Hohai University, Nanjing, 210098, China
4 State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou, 221116, China

* Corresponding Author: Qingxiang Meng. Email:

Computer Modeling in Engineering & Sciences 2024, 139(1), 337-359. https://doi.org/10.32604/cmes.2023.031496

Received 21 June 2023; Accepted 22 September 2023; Issue published 30 December 2023

Abstract

When the geological environment of rock masses is disturbed, numerous non-persisting open joints can appear within it. It is crucial to investigate the effect of open joints on the mechanical properties of rock mass. However, it has been challenging to generate realistic open joints in traditional experimental tests and numerical simulations. This paper presents a novel solution to solve the problem. By utilizing the stochastic distribution of joints and an enhanced-fractal interpolation system (IFS) method, rough curves with any orientation can be generated. The Douglas-Peucker algorithm is then applied to simplify these curves by removing unnecessary points while preserving their fundamental shape. Subsequently, open joints are created by connecting points that move to both sides of rough curves based on the aperture distribution. Mesh modeling is performed to construct the final mesh model. Finally, the RB-DEM method is applied to transform the mesh model into a discrete element model containing geometric information about these open joints. Furthermore, this study explores the impacts of rough open joint orientation, aperture, and number on rock fracture mechanics. This method provides a realistic and effective approach for modeling and simulating these non-persisting open joints.

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