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Numerical modeling of adiabatic heat generation during rock fracture under dynamic loading

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Numerical modeling of adiabatic heat generation during rock fracture under dynamic loading. / Saksala, Timo.

In: International Journal for Numerical and Analytical Methods in Geomechanics, Vol. 43, No. 9, 25.06.2019, p. 1770-1783.

Research output: Contribution to journalArticleScientificpeer-review

Harvard

Saksala, T 2019, 'Numerical modeling of adiabatic heat generation during rock fracture under dynamic loading', International Journal for Numerical and Analytical Methods in Geomechanics, vol. 43, no. 9, pp. 1770-1783. https://doi.org/10.1002/nag.2935

APA

Saksala, T. (2019). Numerical modeling of adiabatic heat generation during rock fracture under dynamic loading. International Journal for Numerical and Analytical Methods in Geomechanics, 43(9), 1770-1783. https://doi.org/10.1002/nag.2935

Vancouver

Saksala T. Numerical modeling of adiabatic heat generation during rock fracture under dynamic loading. International Journal for Numerical and Analytical Methods in Geomechanics. 2019 Jun 25;43(9):1770-1783. https://doi.org/10.1002/nag.2935

Author

Saksala, Timo. / Numerical modeling of adiabatic heat generation during rock fracture under dynamic loading. In: International Journal for Numerical and Analytical Methods in Geomechanics. 2019 ; Vol. 43, No. 9. pp. 1770-1783.

Bibtex - Download

@article{2669816f0422426688abde2089f8fd62,
title = "Numerical modeling of adiabatic heat generation during rock fracture under dynamic loading",
abstract = "This paper considers adiabatic heat generation during rock fracture underdynamic loading. To this end, a thermo‐viscoplastic constitutive model for rockbased on Mohr‐Coulomb and Rankine criteria augmented with the adiabaticheat equation is developed. Young's modulus and the compressive and tensilestrengths are taken as the temperature‐dependent parameters. A numericalsolution algorithm based on the Newton‐Raphson iteration and the cuttingplane algorithm at the material point level is presented. Furthermore, thereis a description of an explicit staggered scheme for solving the heat conductionat the specimen level in rock material. Then, the model is applied in 2D and 3Dnumerical simulations of compression and tension tests on a rock‐like materialwith compressive and tensile strengths of 120 and 10 MPa, respectively. Thesimulations predict that the temperature rise because of adiabatic heat genera-tion during rock fracture is in the order of a few degrees centigrade, even at astrain rate of 100 s−1. In conclusion, the effect of including heat conduction isshown to be insignificant because of the short duration of dynamic loadingprocesses.",
author = "Timo Saksala",
year = "2019",
month = "6",
day = "25",
doi = "10.1002/nag.2935",
language = "English",
volume = "43",
pages = "1770--1783",
journal = "International Journal for Numerical and Analytical Methods in Geomechanics",
issn = "0363-9061",
publisher = "Wiley",
number = "9",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - Numerical modeling of adiabatic heat generation during rock fracture under dynamic loading

AU - Saksala, Timo

PY - 2019/6/25

Y1 - 2019/6/25

N2 - This paper considers adiabatic heat generation during rock fracture underdynamic loading. To this end, a thermo‐viscoplastic constitutive model for rockbased on Mohr‐Coulomb and Rankine criteria augmented with the adiabaticheat equation is developed. Young's modulus and the compressive and tensilestrengths are taken as the temperature‐dependent parameters. A numericalsolution algorithm based on the Newton‐Raphson iteration and the cuttingplane algorithm at the material point level is presented. Furthermore, thereis a description of an explicit staggered scheme for solving the heat conductionat the specimen level in rock material. Then, the model is applied in 2D and 3Dnumerical simulations of compression and tension tests on a rock‐like materialwith compressive and tensile strengths of 120 and 10 MPa, respectively. Thesimulations predict that the temperature rise because of adiabatic heat genera-tion during rock fracture is in the order of a few degrees centigrade, even at astrain rate of 100 s−1. In conclusion, the effect of including heat conduction isshown to be insignificant because of the short duration of dynamic loadingprocesses.

AB - This paper considers adiabatic heat generation during rock fracture underdynamic loading. To this end, a thermo‐viscoplastic constitutive model for rockbased on Mohr‐Coulomb and Rankine criteria augmented with the adiabaticheat equation is developed. Young's modulus and the compressive and tensilestrengths are taken as the temperature‐dependent parameters. A numericalsolution algorithm based on the Newton‐Raphson iteration and the cuttingplane algorithm at the material point level is presented. Furthermore, thereis a description of an explicit staggered scheme for solving the heat conductionat the specimen level in rock material. Then, the model is applied in 2D and 3Dnumerical simulations of compression and tension tests on a rock‐like materialwith compressive and tensile strengths of 120 and 10 MPa, respectively. Thesimulations predict that the temperature rise because of adiabatic heat genera-tion during rock fracture is in the order of a few degrees centigrade, even at astrain rate of 100 s−1. In conclusion, the effect of including heat conduction isshown to be insignificant because of the short duration of dynamic loadingprocesses.

U2 - 10.1002/nag.2935

DO - 10.1002/nag.2935

M3 - Article

VL - 43

SP - 1770

EP - 1783

JO - International Journal for Numerical and Analytical Methods in Geomechanics

JF - International Journal for Numerical and Analytical Methods in Geomechanics

SN - 0363-9061

IS - 9

ER -