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Fatigue properties of intact sandstone samples subjected to dynamic uniaxial cyclical loading

IR@CIMFR: CSIR-Central Institute of Mining and Fuel Research, Dhanbad

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Title Fatigue properties of intact sandstone samples subjected to dynamic uniaxial cyclical loading
 
Creator Bagde, M.N.
Petros, V.
 
Subject Rock Testing
Geo-Mechanics and Mine Design
 
Description In this paper, the fatigue behaviour of intact sandstone samples obtained from a rockburst prone coal mine and studied under dynamic uniaxial cyclic loading in the laboratory is presented. Tests were conducted on dry and saturated samples with loading frequencies ranging from 0.1, 1 and 10 Hz and amplitudes of 0.05, 0.1 and 0.15 mm. From the laboratory investigations, it was found that the loading frequency, as well as the amplitude, was of great significance and influenced the rock behaviour in dynamic cyclic loading conditions. The dynamic fatigue strength and the dynamic axial stiffness of the rock reduced with loading frequencies and amplitude. The dynamic modulus was found to increase with the loading frequency but decrease with the amplitude. In the case of the saturated samples, it was found that the dynamic fatigue strength reduced by approximately 30 per cent, while the dynamic Young’s modulus reduced by about 20 per cent. From the presented study, the dynamic energy was found to be independent of the testing conditions while other rock properties were found to be dependent on these. Finally, it was concluded that rock would more readily succumb at low frequencies and amplitude than at high frequencies and amplitude for a given energy availability.
 
Publisher Elsevier
 
Date 2005
 
Type Article
PeerReviewed
 
Format application/pdf
 
Identifier http://cimfr.csircentral.net/61/1/1.pdf
Bagde, M.N. and Petros, V. (2005) Fatigue properties of intact sandstone samples subjected to dynamic uniaxial cyclical loading. International Journal of Rock Mechanics and Mining Sciences , 42 (2). pp. 237-250. ISSN 1365-1609
 
Relation http://sciencedirect.com
http://cimfr.csircentral.net/61/