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142639 - Hybrid finite-discrete element modelling of rock fracture during conventional.pdf (5.39 MB)

Hybrid finite-discrete element modelling of rock fracture during conventional compressive and tensile strength tests under quasi-static and dynamic loading conditions

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posted on 2023-05-20, 20:37 authored by An, H, Hongyuan LiuHongyuan Liu, Han, H
A hybrid finite-discrete element method is proposed to model the rock fracture under various loading conditions. The key component of the hybrid method, i.e. transition from continuum to discontinuum through fracture and fragmentation, is introduced in detail. An empirical relationship between the static strengths and the dynamic strengths derived from the dynamic rock fracture experiments is implemented in the hybrid method to model the effect of loading rate. The hybrid method is calibrated by modelling the Brazilian tensile strength (BTS) test, uniaxial compressive strength (UCS) and notched Brazilian dis tests. Then the hybrid method is employed to model the dynamic rock fracture process in UCS and BTS tests. The proposed method has well modelled the dynamic rock fracture and fragmentation processes and captured the effect of loading rate on rock strengths. It is concluded that the hybrid finite-discrete element is a valuable tool to study the dynamic rock fracture as it takes the advantages of the continuum and discontinuum based method, and considers the effect of loading rate.

Funding

University of Tasmania

History

Publication title

Latin American Journal of Solids and Structures

Volume

17

Issue

6

Article number

e300

Number

e300

Pagination

1-32

ISSN

1679-7825

Department/School

School of Engineering

Publisher

Associacao Brasileira de Metodos Computacionais em Engenharia,Brazilian Association of Computational Mechanics

Place of publication

Brazil

Rights statement

Copyright © 2020. This is an Open Access article distributed under the terms of the Creative Commons Attribution 4.0 International (CC BY 4.0) License, (https://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Repository Status

  • Open

Socio-economic Objectives

Expanding knowledge in engineering

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