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An advanced assessment of mechanical fracture parameters of sandstones depending on the internal rock texture features
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SYSNO ASEP 0503886 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title An advanced assessment of mechanical fracture parameters of sandstones depending on the internal rock texture features Author(s) Vavro, Leona (UGN-S) RID
Malíková, L. (CZ)
Frantík, P. (CZ)
Kubeš, P. (CZ)
Keršner, Z. (CZ)
Vavro, Martin (UGN-S) RID, ORCIDNumber of authors 6 Source Title Acta geodynamica et geomaterialia. - : Ústav struktury a mechaniky hornin AV ČR, v. v. i. - ISSN 1214-9705
Roč. 16, č. 2 (2019), s. 157-168Number of pages 12 s. Publication form Online - E Language eng - English Country CZ - Czech Republic Keywords sandstone ; mode I fracture toughness ; bending Young's modulus ; fracture energy ; load–displacement diagram Subject RIV JL - Materials Fatigue, Friction Mechanics OECD category Mechanical engineering R&D Projects LO1406 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Open access Institutional support UGN-S - RVO:68145535 UT WOS 000473619300005 EID SCOPUS 85068474145 DOI 10.13168/AGG.2019.0013 Annotation In this paper, sandstones from three Czech localities were subjected to mechanical fracture testsin order to obtain their properties. Carboniferous sandstone from the Staříč site was primarilydifferent from the two other Cretaceous sandstones from Podhorní Újezd and Javorka localitiesin the type of grain contact, as well as in their mineralogical composition of the rock matrix andcement. These differences were primarily reflected in different rock porosities. An advancedassessment of the fracture response of the chevron notch specimens made of sandstonessubjected to three-point bending test was carried out by means of the GTDiPS programsuggested for processing the loading diagrams. Bending Young's modulus, mode I fracturetoughness and fracture energy were subsequently calculated for all tested sandstone samples.Obtained outcomes show that the sandstone from the Staříč mine exhibits several times highervalues of investigated properties than the Podhorní Újezd and Javorka sandstones. This wasa result of a higher degree of rock compaction, siliciferous rock cement and, therefore, relativelylow total porosity. Internal rock texture and mineralogical composition of matrix or cement arethus one of the most important factors influencing the values of mechanical fracture parametersof sandstones. Workplace Institute of Geonics Contact Lucie Gurková, lucie.gurkova@ugn.cas.cz, Tel.: 596 979 354 Year of Publishing 2020 Electronic address https://www.irsm.cas.cz/materialy/acta_content/2019_doi/Vavro_AGG_2019_0013.pdf
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