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Visualization of the Evolution of the Fracture Process Zone in Sandstone by Transmission Computed Radiography

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, ORCID}
Number 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