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

doi:10.1016/j.ijimpeng.2015.04.010

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 journal › Article › peer-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 language	English
Pages (from-to)	146-155
Number of pages	10
Journal	International Journal of Impact Engineering
Volume	87
DOIs	https://doi.org/10.1016/j.ijimpeng.2015.04.010
Publication status	Published - 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

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10.1016/j.ijimpeng.2015.04.010

Cite this

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

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.",

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author = "Gui, {Yi Lin} and Bui, {Ha H.} and Jayantha Kodikara and Zhang, {Qian Bing} and Jian Zhao and Timon Rabczuk",

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AU - Zhao, Jian

AU - Rabczuk, Timon

N1 - 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.

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N2 - 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.

AB - 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.

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

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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