EGU2020-4046
https://doi.org/10.5194/egusphere-egu2020-4046
EGU General Assembly 2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

The effect of seismic-like induced cyclic loading on damage response of sandstone and granite

Rashid Geranmayeh Vaneghi1, Arcady V. Dyskin2, Klaus Thoeni3, Mostafa Sharifzadeh4, and Mohammad Sarmadivaleh5
Rashid Geranmayeh Vaneghi et al.
  • 1PhD student, WA School of Mines: Minerals, Energy and Chemical Engineering, Curtin University, Kalgoorlie, WA 6430, Australia, (r.geranmayeh@postgrad.curtin.edu.au)
  • 2Winthrop professor, School of Civil, Environmental and Mining Engineering, The University of Western Australia, Crawley, WA 6009, Australia, (arcady.dyskin@uwa.edu.au)
  • 3Research associate, Centre for Geotechnical Science and Engineering, The University of Newcastle, Callaghan, NSW 2308, Australia, (klaus.thoeni@newcastle.edu.au)
  • 4Senior lecturer, WA School of Mines: Minerals, Energy and Chemical Engineering, Curtin University, Kalgoorlie, WA 6430, Australia, (m.sharifzadeh@curtin.edu.au)
  • 5Senior lecturer, WA School of Mines: Minerals, Energy and Chemical Engineering, Curtin University, Kensington, Perth, WA 6151, Australia, (mohammad.sarmadivaleh@curtin.edu.au)

The detailed study of rock response to cyclic loading induced by natural phenomena, such as seismic and volcanic activities, and man-made explosions and excavation is necessary for failure prediction and hazard mitigation. The effect of the maximum stress level, loading amplitude, and frequency of stress cycles on the fatigue life and failure mechanisms of two microstructurally different rocks of granite/granodiorite and sandstone is investigated. Test data obtained from comprehensive experiments conducted on these rock types incorporated with the results of previous studies show that the fatigue life time of both rock types increases with a decrease in either maximum stress level or stress amplitude. Nevertheless, the fatigue strength threshold of hard rocks like granite is generally lower than that of soft rocks like sandstone. The study also shows that the low-frequency cyclic loading has more damaging effect on both rock types than the high frequency loading. This investigation demonstrates that the failure mechanism of rocks under cyclic loading is characterized by the development of more tensile microcracks compared to the monotonic loading and the opening and extension of the axial tensile microfractures are more evident at higher maximum stresses or loading amplitudes or at lower loading frequencies. The results presented in this study will contribute to a deeper understanding of the fatigue responses of sandstone and granite to seismic-generated loading–unloading processes under different conditions of stress cycles.

How to cite: Geranmayeh Vaneghi, R., V. Dyskin, A., Thoeni, K., Sharifzadeh, M., and Sarmadivaleh, M.: The effect of seismic-like induced cyclic loading on damage response of sandstone and granite, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-4046, https://doi.org/10.5194/egusphere-egu2020-4046, 2020

Displays

Display file