Hybrid Finite-Discrete Element Modelling of Various Rock Fracture Modes during Three Conventional Bending Tests

Huaming An, Shunchuan Wu, Hongyuan Liu and Xuguang Wang
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Huaming An: Faculty of Public Security and Emergency Management, Kunming University of Science and Technology, Kunming 650093, China
Shunchuan Wu: Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, China
Hongyuan Liu: College of Science and Engineering, University of Tasmania, Hobart, TAS 7001, Australia
Xuguang Wang: School of Civil and Resources Engineering, University of Science and Technology Beijing, Beijing 100083, China

Sustainability, 2022, vol. 14, issue 2, 1-26

Abstract: The numerical techniques for modelling the rock fracture have been briefly reviewed. A hybrid finite-discrete element method (HFDEM) is proposed to simulate various fracture types of rock. A fracture model is implemented in the HFDEM for simulation of the three main fracture types. In addition, the influence of the strain rate is considered during the HFDEM modelling rock behavior. Then, two typical rock mechanism tests are employed to calibrate the HFDEM. The proposed method has well modelled the rock fracture processes and can obtain reasonable stress distribution and force–displacement curves. After that, the HFDEM is used to model three convention bending tests. The obtained rock fracture processes indicates that the HFDEM can simulate various fracture types. The obtained rock strengths and fracture toughness indicate that the HFDEM can reflect the influence of the strain rate. It is concluded that the HFDEM can model the entire and complete rock fracture process during the three convention bending tests, and it also can capture the rock’s behavior on the strain rate.

Keywords: HFDEM; numerical method; rock fracture; strain rate (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
References: View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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