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Laboratory measurement of elastic anisotropy on spherical rock samples by longitudinal and transverse sounding under confining pressure
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SYSNO ASEP 0435076 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Laboratory measurement of elastic anisotropy on spherical rock samples by longitudinal and transverse sounding under confining pressure Tvůrce(i) Lokajíček, Tomáš (GLU-S) RID, SAI, ORCID
Svitek, Tomáš (GLU-S) SAI, RIDZdroj.dok. Ultrasonics. - : Elsevier - ISSN 0041-624X
Roč. 56, February 2015 (2015), s. 294-302Poč.str. 9 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. NL - Nizozemsko Klíč. slova elastic anisotropy ; hydrostatic pressure ; ultrasonic sounding ; high pressure ; longitudinal and shear waves Vědní obor RIV DB - Geologie a mineralogie CEP LH13102 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy GAP104/12/0915 GA ČR - Grantová agentura ČR GA13-13967S GA ČR - Grantová agentura ČR Institucionální podpora GLU-S - RVO:67985831 UT WOS 000345386000033 EID SCOPUS 84911969211 DOI 10.1016/j.ultras.2014.08.015 Anotace Knowledge of shear wave velocities in loaded rocks is important in describing elastic anisotropy. A new high-pressure measuring head was designed and constructed for longitudinal and traversal ultrasonic sounding of spherical rock samples in 132 independent directions under hydrostatic pressure up to 60 MPa. The velocity is measured using a pair of P-wave sensors and two pairs of S-wave sensors (T V /R V and T H /R H ) with perpendicular polarization. An isotropic glass sphere was used to calibrate the experimental setup. A fine-grained anisotropic quartzite sample was examined using the P- and S-wave ultrasonic sounding. Waveforms are recorded by pairs of T P /R P ,T V /R V and T H /R H transducers in a range of confining pressure between 0.1 and 60 MPa. The recorded data showed a shear wave splitting in three basic structural directions of the sample. The measurements proved to be useful in investigating oriented micro-cracks, lattice (LPO) and shape-preferred orientation (SPO) for the bulk elastic anisotropy of aniso- tropic rocks subjected to hydrostatic pressure. Pracoviště Geologický ústav Kontakt Jana Popelková, popelkova@gli.cas.cz, Sabina Janíčková, Tel.: 233 087 272 Rok sběru 2016
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