Počet záznamů: 1
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 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve SCOPUS Název Study of fracture processes in sandstone subjected to four-point bending by means of 4D X-ray computed micro-tomography Tvůrce(i) 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, ORCIDCelkový počet autorů 7 Číslo článku 34 Zdroj.dok. Acta IMEKO - ISSN 2221-870X
Roč. 11, č. 2 (2022)Poč.str. 7 s. Forma vydání Online - E Jazyk dok. eng - angličtina Země vyd. DE - Německo Klíč. slova four-point bending test ; chevron-notched core specimen ; crack propagation ; 4D micro-CT ; sandstone Obor OECD Environmental and geological engineering, geotechnics Vědní obor RIV – spolupráce Ústav teoretické a aplikované mechaniky - Únava materiálu a lomová mechanika CEP EF16_019/0000766 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Způsob publikování Open access Institucionální podpora UGN-S - RVO:68145535 ; UTAM-F - RVO:68378297 EID SCOPUS 85131601884 DOI 10.21014/acta_imeko.v11i2.1220 Anotace 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.Pracoviště Ústav geoniky Kontakt Lucie Gurková, lucie.gurkova@ugn.cas.cz, Tel.: 596 979 354 Rok sběru 2023 Elektronická adresa https://acta.imeko.org/index.php/acta-imeko/article/view/1220
Počet záznamů: 1