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Study of fracture processes in sandstone subjected to four-point bending by means of 4D X-ray computed micro-tomography
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SYSNO ASEP 0557121 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve SCOPUS Title Study of fracture processes in sandstone subjected to four-point bending by means of 4D X-ray computed micro-tomography Author(s) Vavro, Leona (UGN-S) RID
Vavro, Martin (UGN-S) RID, ORCID
Souček, Kamil (UGN-S) RID, ORCID
Fíla, Tomáš (UTAM-F) RID, SAI, ORCID
Koudelka_ml., Petr (UTAM-F) RID, SAI, ORCID
Vavřík, Daniel (UTAM-F) RID, SAI, ORCID
Kytýř, Daniel (UTAM-F) SAI, RID, ORCIDNumber of authors 7 Article number 34 Source Title Acta IMEKO - ISSN 2221-870X
Roč. 11, č. 2 (2022)Number of pages 7 s. Publication form Online - E Language eng - English Country DE - Germany Keywords four-point bending test ; chevron-notched core specimen ; crack propagation ; 4D micro-CT ; sandstone OECD category Environmental and geological engineering, geotechnics Subject RIV - cooperation Institute of Theoretical and Applied Mechanics - Materials Fatigue, Friction Mechanics R&D Projects EF16_019/0000766 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Open access Institutional support UGN-S - RVO:68145535 ; UTAM-F - RVO:68378297 EID SCOPUS 85131601884 DOI 10.21014/acta_imeko.v11i2.1220 Annotation High-resolution X-ray computed micro-tomography (CT) is a powerful technique for studying the processes of crack propagation in non-homogenous quasi-brittle materials such as rocks. To obtain all the significant information about the deformation behaviour and fracture characteristics of the studied rocks, the use of a highly specialised loading device suitable for the integration into existing tomographic setups is crucial. Since no adequate commercial solution is currently available, a completely newly-designed loading device with a four-point bending setup and vertically-oriented scanned samples was used. This design of the loading procedure, coupled with the high stiffness of the loading frame, allows the loading process to be interrupted at any time and for CT scanning to be performed without the risk of the sudden destruction of the scanned sample.
This article deals with the use of the 4D CT for the visualisation of crack initiation and propagation in clastic sedimentary rocks. Two types of quartz-rich sandstones of Czech provenance were used for tomographic observations during the four-point bending loading performed on chevron notched test specimens. It was found that the crack begins to propagate from the moment that ca. 80 % of the maximum loading force is applied.Workplace Institute of Geonics Contact Lucie Gurková, lucie.gurkova@ugn.cas.cz, Tel.: 596 979 354 Year of Publishing 2023 Electronic address https://acta.imeko.org/index.php/acta-imeko/article/view/1220
Number of the records: 1