Počet záznamů: 1
Micro‑Fracturing in Granitic Rocks During Uniaxial Loading: The Role of Grain Size Heterogeneity
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SYSNO ASEP 0579238 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Micro‑Fracturing in Granitic Rocks During Uniaxial Loading: The Role of Grain Size Heterogeneity Tvůrce(i) Petružálek, Matěj (GLU-S) RID, SAI, ORCID
Jechumtálová, Zuzana (GFU-E) ORCID, RID
Lokajíček, Tomáš (GLU-S) RID, SAI, ORCID
Kolář, Petr (GFU-E) ORCID, RID
Šílený, Jan (GFU-E) ORCID, RIDZdroj.dok. Rock Mechanics and Rock Engineering. - : Springer - ISSN 0723-2632
Roč. 57, č. 3 (2024), s. 1963-1981Poč.str. 19 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. DE - Německo Klíč. slova Uniaxial compressive test ; Fracturing ; Grain size heterogeneity ; Acoustic emission ; Source mechanism ; Granite Obor OECD Environmental and geological engineering, geotechnics CEP GA21-26542S GA ČR - Grantová agentura ČR GA22-00580S GA ČR - Grantová agentura ČR Způsob publikování Omezený přístup Institucionální podpora GLU-S - RVO:67985831 ; GFU-E - RVO:67985530 UT WOS 01114664300001 EID SCOPUS 85171174457 DOI 10.1007/s00603-023-03668-7 Anotace Laboratory loading experiments, in general, are used to estimate the mechanical properties of rocks. The application of acoustic emission (AE), a proxy for very small-scale earthquakes, offers insights into rock fracturing, especially when advanced seismological methods are applied. The uniaxial compressive test, the most conventional test within the scope of laboratory rock mechanics, estimates strength, elastic constants, or microcracking thresholds. Obviously, rock structure and grain size heterogeneity are the crucial parameters controlling these mechanical properties. Here, four granites with a different structure were uniaxially loaded, while AE was monitored, in order to observe the manner of fracturing. AE data were utilized at three different quality levels (AE recognition, AE localization, and the AE source mechanism). However, our focus was to study AE source mechanisms via the application of a shear-tensile crack source model. During a uniaxial compressive test, common (structurally independent) AE features led to the general characterization of microfracturing. On the other hand, sample related differences in AE results are discussed with respect to the role of granite heterogeneity. The comprehensiveness of the AE application demonstrated the validity of various levels of AE experiments. Pracoviště Geologický ústav Kontakt Jana Popelková, popelkova@gli.cas.cz, Sabina Janíčková, Tel.: 233 087 272 Rok sběru 2025 Elektronická adresa https://doi.org/10.1007/s00603-023-03668-7
Počet záznamů: 1