Počet záznamů: 1
Identification of higher symmetry in triclinic stiffness tensor: Application to high pressure dependence of elastic anisotropy in deep underground structures
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SYSNO ASEP 0561120 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Identification of higher symmetry in triclinic stiffness tensor: Application to high pressure dependence of elastic anisotropy in deep underground structures Tvůrce(i) Aminzadeh, Ali (GLU-S)
Petružálek, Matěj (GLU-S) RID, SAI, ORCID
Vavryčuk, Václav (GLU-S)
Ivankina, T. I. (RU)
Svitek, Tomáš (GLU-S) SAI, RID
Petrlíková, Alice (UGN-S)
Staš, Lubomír (UGN-S) RID, ORCID
Lokajíček, Tomáš (GLU-S) RID, SAI, ORCIDČíslo článku 105168 Zdroj.dok. International Journal of Rock Mechanics and Mining Sciences. - : Elsevier - ISSN 1365-1609
Roč. 158, October (2022)Poč.str. 16 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova Ultrasonic sounding ; Dynamic elastic constants ; Transverse isotropy ; Orthorhombic/orthotropic symmetry ; P waves ; S waves Obor OECD Environmental and geological engineering, geotechnics Vědní obor RIV – spolupráce Ústav geoniky - Báňský průmysl vč. těžby a zpracování uhlí CEP LO1406 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy GA22-00580S GA ČR - Grantová agentura ČR Způsob publikování Omezený přístup Institucionální podpora GLU-S - RVO:67985831 ; UGN-S - RVO:68145535 UT WOS 000855044200002 EID SCOPUS 85137050557 DOI 10.1016/j.ijrmms.2022.105168 Anotace We present an approach of identifying anisotropy axes and the type of symmetry from ultrasonic measurements of 21 elastic constants of the complete stiffness tensor characterizing anisotropic materials. The approach is applied to examine anisotropic elasticity of two crystalline rock samples from two underground research laboratories: (1) the migmatized gneiss from Bukov in the Czech Republic, and (2) the Aare Granite from Grimsel in Switzerland. The full stiffness matrix is measured at selected pressure levels from 0.1 to 100 MPa. We demonstrate that the Bukov migmatized gneiss is orthorhombic, whereas the Grimsel granite is transversely isotropic under atmospheric pressure. The degree of anisotropy of both rocks decreases with applied confining pressure due to closing of preferentially oriented cracks. While the Grimsel granite is very sensitive to pressure and becomes almost isotropic at high pressures, a great portion of anisotropy in the Bukov migmatized gneiss remains even under high pressures due to its texture. The dependence of Young’s and shear moduli with pressure emphasizes the importance of taking the pressure into account for underground projects. Pracoviště Geologický ústav Kontakt Jana Popelková, popelkova@gli.cas.cz, Sabina Janíčková, Tel.: 233 087 272 Rok sběru 2023 Elektronická adresa https://www.sciencedirect.com/science/article/pii/S1365160922001344?via%3Dihub
Počet záznamů: 1