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Numerical modelling of rock fracture with a Hoek-Brown viscoplastic-damage model implemented with polygonal finite elements

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

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Numerical modelling of rock fracture with a Hoek-Brown viscoplastic-damage model implemented with polygonal finite elements. / Saksala, Timo.

Geomechanics and Geodynamics of Rock Masses, Volume 1: Proceedings of the 2018 European Rock Mechanics Symposium. ed. / Vladimir Litvinenko. CRC Press, 2018. p. 903-908.

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Harvard

Saksala, T 2018, Numerical modelling of rock fracture with a Hoek-Brown viscoplastic-damage model implemented with polygonal finite elements. in V Litvinenko (ed.), Geomechanics and Geodynamics of Rock Masses, Volume 1: Proceedings of the 2018 European Rock Mechanics Symposium. CRC Press, pp. 903-908, European Rock Mechanics Symposium , St. Petersburg, Russian Federation, 22/05/18.

APA

Saksala, T. (2018). Numerical modelling of rock fracture with a Hoek-Brown viscoplastic-damage model implemented with polygonal finite elements. In V. Litvinenko (Ed.), Geomechanics and Geodynamics of Rock Masses, Volume 1: Proceedings of the 2018 European Rock Mechanics Symposium (pp. 903-908). CRC Press.

Vancouver

Saksala T. Numerical modelling of rock fracture with a Hoek-Brown viscoplastic-damage model implemented with polygonal finite elements. In Litvinenko V, editor, Geomechanics and Geodynamics of Rock Masses, Volume 1: Proceedings of the 2018 European Rock Mechanics Symposium. CRC Press. 2018. p. 903-908

Author

Saksala, Timo. / Numerical modelling of rock fracture with a Hoek-Brown viscoplastic-damage model implemented with polygonal finite elements. Geomechanics and Geodynamics of Rock Masses, Volume 1: Proceedings of the 2018 European Rock Mechanics Symposium. editor / Vladimir Litvinenko. CRC Press, 2018. pp. 903-908

Bibtex - Download

@inproceedings{67070e20fc3a4dedbad13d4ef5f46a38,
title = "Numerical modelling of rock fracture with a Hoek-Brown viscoplastic-damage model implemented with polygonal finite elements",
abstract = "In the present paper, the rock mineral structure is described as a Voronoi diagram where the Voronoi cells are polygonal finite elements. The minerals constituting the rock are represented by random clusters of polygonal finite elements. Rock fracture is described in the continuum sense by using a damage-viscoplasticity model based on the Hoek-Brown criterion. Due to the asymmetry of the tension and compression behavior of rocks, separate scalar damage variables, driven by viscoplastic strain, are employed in tension and compression. The system equation of motion are solved by explicit time marching since the final aim of this research project is to model transient problems with contact loading (such as percussive rock drilling). In the numerical examples, the capabilities of the present numerical approach are demonstrated. Specifically, uniaxialtension and compression tests of a numerical rock sample are simulated under plane strain conditions. It is shown that the present method can capture the salient features, including the stress-strain response and the failure modes, of typical rock behavior in these constitutive tests.",
author = "Timo Saksala",
year = "2018",
month = "5",
language = "English",
pages = "903--908",
editor = "Litvinenko, {Vladimir }",
booktitle = "Geomechanics and Geodynamics of Rock Masses, Volume 1: Proceedings of the 2018 European Rock Mechanics Symposium",
publisher = "CRC Press",

}

RIS (suitable for import to EndNote) - Download

TY - GEN

T1 - Numerical modelling of rock fracture with a Hoek-Brown viscoplastic-damage model implemented with polygonal finite elements

AU - Saksala, Timo

PY - 2018/5

Y1 - 2018/5

N2 - In the present paper, the rock mineral structure is described as a Voronoi diagram where the Voronoi cells are polygonal finite elements. The minerals constituting the rock are represented by random clusters of polygonal finite elements. Rock fracture is described in the continuum sense by using a damage-viscoplasticity model based on the Hoek-Brown criterion. Due to the asymmetry of the tension and compression behavior of rocks, separate scalar damage variables, driven by viscoplastic strain, are employed in tension and compression. The system equation of motion are solved by explicit time marching since the final aim of this research project is to model transient problems with contact loading (such as percussive rock drilling). In the numerical examples, the capabilities of the present numerical approach are demonstrated. Specifically, uniaxialtension and compression tests of a numerical rock sample are simulated under plane strain conditions. It is shown that the present method can capture the salient features, including the stress-strain response and the failure modes, of typical rock behavior in these constitutive tests.

AB - In the present paper, the rock mineral structure is described as a Voronoi diagram where the Voronoi cells are polygonal finite elements. The minerals constituting the rock are represented by random clusters of polygonal finite elements. Rock fracture is described in the continuum sense by using a damage-viscoplasticity model based on the Hoek-Brown criterion. Due to the asymmetry of the tension and compression behavior of rocks, separate scalar damage variables, driven by viscoplastic strain, are employed in tension and compression. The system equation of motion are solved by explicit time marching since the final aim of this research project is to model transient problems with contact loading (such as percussive rock drilling). In the numerical examples, the capabilities of the present numerical approach are demonstrated. Specifically, uniaxialtension and compression tests of a numerical rock sample are simulated under plane strain conditions. It is shown that the present method can capture the salient features, including the stress-strain response and the failure modes, of typical rock behavior in these constitutive tests.

UR - https://www.crcpress.com/Geomechanics-and-Geodynamics-of-Rock-Masses-Volume-1-Proceedings-of-the/Litvinenko/p/book/9780429461774

UR - https://www.taylorfrancis.com/books/9780429867729

M3 - Conference contribution

SP - 903

EP - 908

BT - Geomechanics and Geodynamics of Rock Masses, Volume 1: Proceedings of the 2018 European Rock Mechanics Symposium

A2 - Litvinenko, Vladimir

PB - CRC Press

ER -