Influence of the microstructure on rock damage during microwave irradiation: A 3D numerical analysis
Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
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Future Development of Rock Mechanics: Proceedings of the SRM Regional Symposium EUROCK 2015 & 64th Geomechanics Colloquium. ed. / Wulf Schubert; Alexander Kluckner. Salzburg: Österreichische Gesellschaft für Geomechanik, 2015. p. 731-736.
Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
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TY - GEN
T1 - Influence of the microstructure on rock damage during microwave irradiation: A 3D numerical analysis
AU - Toifl, Michael
AU - Meisels, Ronald
AU - Hartlieb, Philipp
AU - Kuchar, Friedemar
AU - Antretter, Thomas
PY - 2015
Y1 - 2015
N2 - A comprehensive 3D simulation research of the stress formation on the microstructure level of hard rocks due to microwave irradiation applied in microwave assisted rock breakage is presented. The specific aim of the present work is to investigate the influence of microstructural details in inhomogeneous rocks. In order to use a realistic rock model, a two component 3D microstructure is generated. The two components are microwave absorbing and transparent, respectively. In the first step of the simulation chain the electric field inside the inhomogeneous rock is obtained by a 3D finite difference time domain (FDTD) calculation. In a subsequent thermo-mechanical finite element (FE) simulation the stresses generated by 15 s heating with 25 kW are obtained. High stresses on the boundaries of the microwave absorbing phase exceeding the tensile strength are observed. Finally, the numerical results are corroborated by microwave experiments performed on granite samples.
AB - A comprehensive 3D simulation research of the stress formation on the microstructure level of hard rocks due to microwave irradiation applied in microwave assisted rock breakage is presented. The specific aim of the present work is to investigate the influence of microstructural details in inhomogeneous rocks. In order to use a realistic rock model, a two component 3D microstructure is generated. The two components are microwave absorbing and transparent, respectively. In the first step of the simulation chain the electric field inside the inhomogeneous rock is obtained by a 3D finite difference time domain (FDTD) calculation. In a subsequent thermo-mechanical finite element (FE) simulation the stresses generated by 15 s heating with 25 kW are obtained. High stresses on the boundaries of the microwave absorbing phase exceeding the tensile strength are observed. Finally, the numerical results are corroborated by microwave experiments performed on granite samples.
M3 - Conference contribution
SN - 978-3-9503898-1-4
SP - 731
EP - 736
BT - Future Development of Rock Mechanics
A2 - Schubert, Wulf
A2 - Kluckner, Alexander
PB - Österreichische Gesellschaft für Geomechanik
CY - Salzburg
ER -
