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Determination of an empirical relations between mode I fracture toughness using CB and SCB specimens and Brazilian tensile strength of rocks
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SYSNO ASEP 0577557 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Determination of an empirical relations between mode I fracture toughness using CB and SCB specimens and Brazilian tensile strength of rocks Author(s) Vavro, Leona (UGN-S) RID
Vavro, Martin (UGN-S) RID, ORCID
Kataoka, M. (JP)Number of authors 3 Source Title Proceedings of the ISRM 15th International Congress on Rock Mechanics and Rock Engineering & 72nd Geomechanics Colloquium – Challenges in Rock Mechanics and Rock Engineering. - Salzburg : Austrian Society for Geomechanics, 2023 / Schubert W. ; Kluckner A. - ISBN 978-3-9503898-3-8 Pages s. 2430-2435 Number of pages 6 s. Publication form Online - E Action ISRM International Congress on Rock Mechanics and Rock Engineering /15./ & Geomechanics Colloquium /72./ – Challenges in Rock Mechanics and Rock Engineering Event date 09.10.2023 - 14.10.2023 VEvent location Salzburg Country AT - Austria Event type WRD Language eng - English Country AT - Austria Keywords rock ; mode I fracture toughness ; CB specimen ; SCB specimen ; Brazilian tensile strength Subject RIV DH - Mining, incl. Coal Mining OECD category Environmental and geological engineering, geotechnics R&D Projects GA23-05128S GA ČR - Czech Science Foundation (CSF) Institutional support UGN-S - RVO:68145535 Annotation Fracture toughness (FT) expresses material resistance to crack propagation leading to its final macroscopic failure. Approximately 20 different laboratory methods are currently used for a mode I and mixed mode I/II FT rock testing. However, it is a well-known fact that, for the same rock, the mode I FT value varies when different specimen types are utilized. Moreover, the preparation of specimens for FT testing may be associated with difficulties in obtaining required notch dimensions. From this point of view, Brazilian tensile strength (BTS) represents an easily and quickly detectable parameter that can be applied for prediction of the mode I FT. In this contribution, the results of investigations of mutual empirical relationships between FT determined using CB and SCB tests, as well as among FT values obtained via these testing methods and BTS are presented. A total of 14 different rock types, mostly sandstones, were used for this research.
Workplace Institute of Geonics Contact Lucie Gurková, lucie.gurkova@ugn.cas.cz, Tel.: 596 979 354 Year of Publishing 2024
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