1
Faculty of Earth Sciences, Shahrood University of Technology, Iran.
2
Department of Engineering Geology, Bu-Ali Sina University, Hamedan, Iran.
3
School of Mining Engineering, University of Adelaide, Australia
4
Department of Geology, Imam Khomeini International University, Qazvin, Iran.
Abstract
The aim of this study is to evaluate the fatigue behavior of granitoid hard rocks under uniaxial cyclic loading. For this purpose, 4 core samples were subjected to static loading and 6 core samples were subjected to dynamic loading of the control force and control displacement type. Control force tests were performed at variable stress levels and constant loading amplitude (68% of uniaxial compressive strength) and a frequency of 1 Hz. Control displacement test was performed in a stepwise manner with increasing upper displacement limit and constant loading amplitude. In order to evaluate the results of fatigue tests, the parameters of maximum and minimum axial strain, maximum and minimum lateral strain, tangential and cross moduli, toughness and buckling energy were used. The results showed that this rock type shows little sensitivity to fatigue damage because its dominant behavior is elastic. Among the fatigue damage parameters, the lateral strain parameter best reflects three-stage fatigue damage. In addition, it was observed that the collapse ring was practically not formed for this rock type and the rock failure was explosive. Also, the control displacement test showed that this rock type exhibits weak strain softening behavior.
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Moomeni,A. A. , Khanlari,G. , Haidari,M. , Caracos,M. and Taleb Beydokhti,A. (2018). Fatigue behavior of hard rocks under cyclic loading. JOURNAL OF ROCK MECHANICS, 1(4), 23-33.
MLA
Moomeni,A. A. , , Khanlari,G. , , Haidari,M. , , Caracos,M. , and Taleb Beydokhti,A. . "Fatigue behavior of hard rocks under cyclic loading", JOURNAL OF ROCK MECHANICS, 1, 4, 2018, 23-33.
HARVARD
Moomeni A. A., Khanlari G., Haidari M., Caracos M., Taleb Beydokhti A. (2018). 'Fatigue behavior of hard rocks under cyclic loading', JOURNAL OF ROCK MECHANICS, 1(4), pp. 23-33.
CHICAGO
A. A. Moomeni, G. Khanlari, M. Haidari, M. Caracos and A. Taleb Beydokhti, "Fatigue behavior of hard rocks under cyclic loading," JOURNAL OF ROCK MECHANICS, 1 4 (2018): 23-33,
VANCOUVER
Moomeni A. A., Khanlari G., Haidari M., Caracos M., Taleb Beydokhti A. Fatigue behavior of hard rocks under cyclic loading. JOURNAL OF ROCK MECHANICS, 2018; 1(4): 23-33.
