Number of the records: 1
Visualization of the Evolution of the Fracture Process Zone in Sandstone by Transmission Computed Radiography
- 1.
SYSNO ASEP 0475785 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Visualization of the Evolution of the Fracture Process Zone in Sandstone by Transmission Computed Radiography Author(s) 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, ORCIDNumber of authors 6 Source Title Procedia Engineering - ISRM European Rock Mechanics Symposium EUROCK 2017. - Amsterdam : Elsevier Ltd., 2017 / Koníček P. ; Souček K. ; Konečný P. - ISSN 1877-7058 Pages s. 689-696 Number of pages 8 s. Publication form Online - E Action ISRM European Rock Mechanics Symposium EUROCK 2017 Event date 20.06.2017 - 23.06.2017 VEvent location Ostrava Country CZ - Czech Republic Event type WRD Language eng - English Country NL - Netherlands Keywords fracture process zone ; fracture toughness ; Chevron Bend (CB) test ; glauconitic sandstone ; X-ray radiography Subject RIV DH - Mining, incl. Coal Mining OECD category Environmental and geological engineering, geotechnics Subject RIV - cooperation Institute of Theoretical and Applied Mechanics - Mining, incl. Coal Mining R&D Projects LO1406 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) ED2.1.00/03.0082 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) GA16-18702S GA ČR - Czech Science Foundation (CSF) GA15-07210S GA ČR - Czech Science Foundation (CSF) Institutional support UGN-S - RVO:68145535 ; UTAM-F - RVO:68378297 UT WOS 000416996000088 EID SCOPUS 85022025539 DOI 10.1016/j.proeng.2017.05.233 Annotation 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. Workplace Institute of Geonics Contact Lucie Gurková, lucie.gurkova@ugn.cas.cz, Tel.: 596 979 354 Year of Publishing 2018 Electronic address http://www.sciencedirect.com/science/article/pii/S1877705817323731
Number of the records: 1