Modelling the dynamic failure of brittle rocks using a hybrid continuum-discrete element method with a mixed-mode cohesive fracture model

Yi Lin Gui, Ha H. Bui, Jayantha Kodikara, Qian Bing Zhang, Jian Zhao, Timon Rabczuk

    Research output: Contribution to journalArticlepeer-review

    107 Citations (Scopus)

    Abstract

    A cohesive fracture model that combines tension, compression and shear material behaviour is implemented into the hybrid continuum-discrete element method, i.e. Universal Distinct Element Code (UDEC), to simulate fracturing process in rock dynamic tests. The fracture model considers both elastic and inelastic (decomposed to fracture and plastic) displacements, with the norm of the effective inelastic displacement used to control the fracture behaviour. Two numerical examples, including notched semi-circular bending and Brazilian disc tests, are conducted to verify the applicability of the model in simulating the dynamic failure of rocks. Results show that the proposed approach is capable of realistically simulating the load rate effects on the mechanical behaviour of rock materials subjected to dynamic loads.

    Original languageEnglish
    Pages (from-to)146-155
    Number of pages10
    JournalInternational Journal of Impact Engineering
    Volume87
    DOIs
    Publication statusPublished - 2016 Jan 1

    Bibliographical note

    Funding Information:
    Funding support from the Australian Research Council via a project LP130100884 (Ha H. Bui and Jayantha Kodikara), Monash Engineering Seed Funding Scheme 2014 (Ha H. Bui), and the State Key Laboratory of Deep GeoMechanics and Underground Engineering via a project SKLGDUEK1401 (Yi-lin Gui) is gratefully acknowledged.

    Publisher Copyright:
    © 2015 Elsevier Ltd. All rights reserved.

    Keywords

    • Brazilian disc test
    • Cohesive fracture model
    • Dynamic failure
    • Mixed-mode
    • Notched semi-circular bending

    ASJC Scopus subject areas

    • Civil and Structural Engineering
    • Automotive Engineering
    • Aerospace Engineering
    • Safety, Risk, Reliability and Quality
    • Ocean Engineering
    • Mechanics of Materials
    • Mechanical Engineering

    Fingerprint

    Dive into the research topics of 'Modelling the dynamic failure of brittle rocks using a hybrid continuum-discrete element method with a mixed-mode cohesive fracture model'. Together they form a unique fingerprint.

    Cite this