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Hybrid finite-discrete element modelling of various rock fracture modes during three conventional bending tests

An, H, Wu, S, Liu, H ORCID: 0000-0002-5437-4695 and Wang, X 2022 , 'Hybrid finite-discrete element modelling of various rock fracture modes during three conventional bending tests' , Sustainability, vol. 14, no. 2 , pp. 1-26 , doi: https://doi.org/10.3390/su14020592.

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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 forcedisplacement 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 rocks behavior on the strain rate.

Item Type: Article
Authors/Creators:An, H and Wu, S and Liu, H and Wang, X
Keywords: HFDEM, numerical method, rock fracture, strain rate
Journal or Publication Title: Sustainability
Publisher: MDPI AG
ISSN: 2071-1050
DOI / ID Number: https://doi.org/10.3390/su14020592
Copyright Information:

© 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) License, (https://creativecommons.org/licenses/by/4.0/), which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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