Micro-mechanical and micro-structural aspects of strength variation in rocks under various loading conditions

Erarslan, N., Ghamgoshar, M. and Williams, D. J. (2015). Micro-mechanical and micro-structural aspects of strength variation in rocks under various loading conditions. In: Mehtap Gulsun Kilic, Oznur Onel, Hakan Basarir, Mehmet Karadeniz and Elif Torun Bilgic, Proceedings of the 24th International Mining Congress of Turkey, IMCET 2015. 24th International Mining Congress of Turkey, IMCET 2015, Antalya, Turkey, (554-560). 14-17 April 2015.

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Name Description MIMEType Size Downloads
Author Erarslan, N.
Ghamgoshar, M.
Williams, D. J.
Title of paper Micro-mechanical and micro-structural aspects of strength variation in rocks under various loading conditions
Conference name 24th International Mining Congress of Turkey, IMCET 2015
Conference location Antalya, Turkey
Conference dates 14-17 April 2015
Proceedings title Proceedings of the 24th International Mining Congress of Turkey, IMCET 2015
Journal name Proceedings of the 24th International Mining Congress of Turkey, IMCET 2015
Place of Publication Ankara, Turkey
Publisher TMMOB Maden Muhendisleri Odasi
Publication Year 2015
Sub-type Fully published paper
Open Access Status Not yet assessed
ISBN 9786050107050
Editor Mehtap Gulsun Kilic
Oznur Onel
Hakan Basarir
Mehmet Karadeniz
Elif Torun Bilgic
Start page 554
End page 560
Total pages 7
Collection year 2016
Language eng
Abstract/Summary This research focuses on the micro-mechanical and micro-structural aspects of strength variation in macro-scale rock structures, because final failure of rocks comes about through a process of interaction/coalescence among the many load-parallel or load-inclined tensile fractures that are generated by micro pre-existing cracks. Provide major contributions to the understanding of stress-induced micro-fracturing of rock under various loading conditions, static and dynamic, resulting in the degradation of macro-scale rock strength, or possibly strain-hardening, of rocks. The outcome of this research is expected to provide rock cutting, civil-geotechnical and mining design engineers with access to new, more accurate rock strength estimation methods, of high value for minimising the risks associated with rock strength uncertainty. A brittle rock type Brisbane tuff specimens were tested. Through the combined use of laboratory tests, Scanning Electron Microscope (SEM) techniques, and Computed Tomography (CT) scan technique, the damage mechanism of rocks under various loading conditions, including static and cyclic, were examined in nano-scale and the results were compared with each other for the first time in literature. Moreover, the sub-critical crack propagation phenomena , which is used to explain the premature failure of ceramics and metals and Fracture Process Zone (FPZ) phenomena, are explained in this research in terms of micro-mechanical strength reduction due to rock fatigue. Thus, modelling and understanding the crack propagation behaviour depending on different amplitude and frequencies are believed very important for the dynamic rock cutting researches and rock cutting machine manufacturers.
Keyword Rock strength
Micro-mechanical
Micro-structural
Damage mechanism
Q-Index Code E1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Conference Paper
Collections: School of Civil Engineering Publications
Official 2016 Collection
 
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