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

Yilin Gui; Ha Hong Bui; Jayantha Kumarasiri Kodikara; Qianbing 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

Yilin Gui, Ha Hong Bui, Jayantha Kumarasiri Kodikara, Qianbing Zhang, Jian Zhao, Timon Rabczuk

Civil Engineering

Research output: Contribution to journal › Article › Research › peer-review

99 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 semicircular 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

Keywords

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

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10.1016/j.ijimpeng.2015.04.010

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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 semicircular 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 simulatingthe load rate effects on the mechanical behaviour of rock materials subjected to dynamic loads.",

keywords = "Cohesive fracture model, Mixed-mode, Dynamic failure, Notched semi-circular bending, Brazilian disc test",

author = "Yilin Gui and Bui, {Ha Hong} and Kodikara, {Jayantha Kumarasiri} and Qianbing Zhang and Jian Zhao and Timon Rabczuk",

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AU - Gui, Yilin

AU - Bui, Ha Hong

AU - Kodikara, Jayantha Kumarasiri

AU - Zhang, Qianbing

AU - Zhao, Jian

AU - Rabczuk, Timon

PY - 2016

Y1 - 2016

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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 semicircular 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 simulatingthe load rate effects on the mechanical behaviour of rock materials subjected to dynamic loads.

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KW - Dynamic failure

KW - Notched semi-circular bending

KW - Brazilian disc test

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DO - 10.1016/j.ijimpeng.2015.04.010

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VL - 87

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JO - International Journal of Impact Engineering

JF - International Journal of Impact Engineering

ER -

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

Abstract

Keywords

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