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Numerical modelling of heat shock‐assisted rock fracture

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Numerical modelling of heat shock‐assisted rock fracture. / Pressacco, Martina; Saksala, Timo.

In: International Journal for Numerical and Analytical Methods in Geomechanics, 29.10.2019.

Research output: Contribution to journalArticleScientificpeer-review

Harvard

Pressacco, M & Saksala, T 2019, 'Numerical modelling of heat shock‐assisted rock fracture', International Journal for Numerical and Analytical Methods in Geomechanics. https://doi.org/10.1002/nag.3004

APA

Pressacco, M., & Saksala, T. (2019). Numerical modelling of heat shock‐assisted rock fracture. International Journal for Numerical and Analytical Methods in Geomechanics. https://doi.org/10.1002/nag.3004

Vancouver

Pressacco M, Saksala T. Numerical modelling of heat shock‐assisted rock fracture. International Journal for Numerical and Analytical Methods in Geomechanics. 2019 Oct 29. https://doi.org/10.1002/nag.3004

Author

Pressacco, Martina ; Saksala, Timo. / Numerical modelling of heat shock‐assisted rock fracture. In: International Journal for Numerical and Analytical Methods in Geomechanics. 2019.

Bibtex - Download

@article{dac0e8b35fd54761878951b7d36654af,
title = "Numerical modelling of heat shock‐assisted rock fracture",
abstract = "This paper presents a numerical investigation on the effects of thermal shock as a pretreatment of rock prior to comminution. More specifically, the effect of heat shock‐induced cracks on the uniaxial compressive strength of rock is numerically studied. The chosen constitutive model of rock employs a (strong) embedded discontinuity finite element formulation to describe cracks. The thermomechanical problem that governs the heat shock pretreatment of rocks is considered as an uncoupled problem because of a highly dominating role of the external heat influx. Two solution methods of the global problem are presented: an explicit‐explicit dynamic scheme and an implicit‐implicit quasi‐static scheme. The model performance is tested in simulations on heterogeneous numerical rock samples subjected first to a heat shock pretreatment and then to a mechanical compression test. According to the results, the compressive strength of intact granite rock having the axial splitting failure mode can be substantially reduced by heat shock pretreatment.",
author = "Martina Pressacco and Timo Saksala",
year = "2019",
month = "10",
day = "29",
doi = "10.1002/nag.3004",
language = "English",
journal = "International Journal for Numerical and Analytical Methods in Geomechanics",
issn = "0363-9061",
publisher = "Wiley",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - Numerical modelling of heat shock‐assisted rock fracture

AU - Pressacco, Martina

AU - Saksala, Timo

PY - 2019/10/29

Y1 - 2019/10/29

N2 - This paper presents a numerical investigation on the effects of thermal shock as a pretreatment of rock prior to comminution. More specifically, the effect of heat shock‐induced cracks on the uniaxial compressive strength of rock is numerically studied. The chosen constitutive model of rock employs a (strong) embedded discontinuity finite element formulation to describe cracks. The thermomechanical problem that governs the heat shock pretreatment of rocks is considered as an uncoupled problem because of a highly dominating role of the external heat influx. Two solution methods of the global problem are presented: an explicit‐explicit dynamic scheme and an implicit‐implicit quasi‐static scheme. The model performance is tested in simulations on heterogeneous numerical rock samples subjected first to a heat shock pretreatment and then to a mechanical compression test. According to the results, the compressive strength of intact granite rock having the axial splitting failure mode can be substantially reduced by heat shock pretreatment.

AB - This paper presents a numerical investigation on the effects of thermal shock as a pretreatment of rock prior to comminution. More specifically, the effect of heat shock‐induced cracks on the uniaxial compressive strength of rock is numerically studied. The chosen constitutive model of rock employs a (strong) embedded discontinuity finite element formulation to describe cracks. The thermomechanical problem that governs the heat shock pretreatment of rocks is considered as an uncoupled problem because of a highly dominating role of the external heat influx. Two solution methods of the global problem are presented: an explicit‐explicit dynamic scheme and an implicit‐implicit quasi‐static scheme. The model performance is tested in simulations on heterogeneous numerical rock samples subjected first to a heat shock pretreatment and then to a mechanical compression test. According to the results, the compressive strength of intact granite rock having the axial splitting failure mode can be substantially reduced by heat shock pretreatment.

U2 - 10.1002/nag.3004

DO - 10.1002/nag.3004

M3 - Article

JO - International Journal for Numerical and Analytical Methods in Geomechanics

JF - International Journal for Numerical and Analytical Methods in Geomechanics

SN - 0363-9061

ER -