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Study of the effect of moisture content and bending rate on the fracture toughness of rocks

SYSNO ASEP	0394580
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Study of the effect of moisture content and bending rate on the fracture toughness of rocks
Author(s)	Vavro, Leona (UGN-S)_RID Souček, Kamil (UGN-S)_{RID, ORCID}
Number of authors	2
Source Title	Acta geodynamica et geomaterialia. - : Ústav struktury a mechaniky hornin AV ČR, v. v. i. - ISSN 1214-9705 Roč. 10, č. 2 (2013), s. 247-253
Number of pages	7 s.
Publication form	Online - E
Language	eng - English
Country	CZ - Czech Republic
Keywords	fracture toughness ; bending rate ; tensile strength
Subject RIV	DB - Geology ; Mineralogy
R&D Projects	ED2.1.00/03.0082 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
Institutional support	UGN-S - RVO:68145535
UT WOS	000321576700014
DOI	10.13168/AGG.2013.0025
Annotation	Generally, rock material failure is c ontrolled by cracks under specific conditi ons. The study of rock fracture toughness belongs to the current frequent directions of research in the area of rock failure. The present paper describes the effects o f parameters influencing the resultant pr operties of rock materials (bending rate , rock moisture) during fracture toughness measurement of different kinds of rocks (sandstone, marble, granite). The highest fracture toughness values were found in the marble samples. This is probably due to the inner structure of analysed marble, which is composed of only one mineral (calcite) and also has a lower porosity th an the used granite. The lowest fracture toughness values were found in the sandstone sample, and reached c. 17–30 % of the measur ed fracture toughness values of the analys ed granite and marble samples. As in the case of the other mechanical properties of rocks (e.g. uni axial compressive strength) also in the case of higher sandstone (carboniferous) moisture the fracture toughness values decrease and its deformat ion ability increases.
Workplace	Institute of Geonics
Contact	Lucie Gurková, lucie.gurkova@ugn.cas.cz, Tel.: 596 979 354
Year of Publishing	2014
Electronic address	http://www.irsm.cas.cz/materialy/acta_content/2013_02/acta_170_14_Vavro_Soucek_247-253.pdf

Number of the records: 1