Počet záznamů: 1
Visualization of the Evolution of the Fracture Process Zone in Sandstone by Transmission Computed Radiography
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SYSNO ASEP 0475785 Druh ASEP C - Konferenční příspěvek (mezinárodní konf.) Zařazení RIV D - Článek ve sborníku Název Visualization of the Evolution of the Fracture Process Zone in Sandstone by Transmission Computed Radiography Tvůrce(i) Vavro, Leona (UGN-S) RID
Souček, Kamil (UGN-S) RID, ORCID
Kytýř, Daniel (UTAM-F) SAI, RID, ORCID
Keršner, Z. (CZ)
Fíla, Tomáš (UTAM-F) RID, SAI, ORCID
Vavro, Martin (UGN-S) RID, ORCIDCelkový počet autorů 6 Zdroj.dok. Procedia Engineering - ISRM European Rock Mechanics Symposium EUROCK 2017. - Amsterdam : Elsevier Ltd., 2017 / Koníček P. ; Souček K. ; Konečný P. - ISSN 1877-7058 Rozsah stran s. 689-696 Poč.str. 8 s. Forma vydání Online - E Akce ISRM European Rock Mechanics Symposium EUROCK 2017 Datum konání 20.06.2017 - 23.06.2017 Místo konání Ostrava Země CZ - Česká republika Typ akce WRD Jazyk dok. eng - angličtina Země vyd. NL - Nizozemsko Klíč. slova fracture process zone ; fracture toughness ; Chevron Bend (CB) test ; glauconitic sandstone ; X-ray radiography Vědní obor RIV DH - Báňský průmysl vč. těžby a zpracování uhlí Obor OECD Environmental and geological engineering, geotechnics Vědní obor RIV – spolupráce Ústav teoretické a aplikované mechaniky - Báňský průmysl vč. těžby a zpracování uhlí CEP LO1406 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy ED2.1.00/03.0082 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy GA16-18702S GA ČR - Grantová agentura ČR GA15-07210S GA ČR - Grantová agentura ČR Institucionální podpora UGN-S - RVO:68145535 ; UTAM-F - RVO:68378297 UT WOS 000416996000088 EID SCOPUS 85022025539 DOI 10.1016/j.proeng.2017.05.233 Anotace The article deals with the use of computed X-ray radiography to visualize the development of the fracture process zone in the rock samples. For radiographic observations during the three-point bending loading, glauconitic sandstone from the Řeka quarry (sometimes also referred to as Godula sandstone) was used. The chevron-notched cylindrical specimens with the diameter of 29 mm and 120 mm nominal length were prepared from the sandstone blocks. These specimens were subjected to the Chevron Bend (CB) test carried out in accordance with the ISRM suggested methodology, the span was 94 mm. The evolution of the fracture process zone was continuously scanned using X-ray radiography during the realized Mode I fracture toughness tests (FTT). The scanning was conducted using an industrial X-ray micro-tomographic inspection system equipped with a flat panel X-ray detector of 4,000 × 4,000 pixels and micro-focus X-ray source with reflection target, which are very suitable for obtaining highly detailed radiographic images during the FTT tests. Three-point bending tests were carried out using an in-house designed table-top loading device, construction of which allows precise control of the loading during testing. Continuous X-ray examination and subsequent radiographic image analysis enable investigation of the crack initiation and the process zone development during FTT and represents a useful tool for a better understanding of failure behavior of the rock material during the loading process. Pracoviště Ústav geoniky Kontakt Lucie Gurková, lucie.gurkova@ugn.cas.cz, Tel.: 596 979 354 Rok sběru 2018 Elektronická adresa http://www.sciencedirect.com/science/article/pii/S1877705817323731
Počet záznamů: 1