Abstract
The fatigue deformation of sandstone was investigated in the laboratory using uniaxial cyclic loading tests. These tests showed that: (1) Fatigue deformation can be divided into three phases, the primary, steady, and acceleration phases. The initiation of the acceleration phase indicates that the sample is about to fail. (2) Sandstone samples subjected to conventional compression tests fail in a different way than samples subjected to cyclic loading tests. The former mainly fail along shear and tensile fractures whereas the latter are transformed into a pile of many large and small fragments. (3) When sandstone is undergoing cyclic loading, the extent of deformation and the dissipated energy change synchronously, so the energy dissipation curve can reflect the fatigue deformation of the sandstone. (4) A model for sandstones deformed by cyclic loading is put forward that describes the U-shaped distribution of energy dissipation points on an energy dissipation-cycle number plot well.
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Acknowledgements
This research was supported by the National Natural Science Foundation of China (Grant Nos. 51379116 and 51574156), and the Natural Science Foundation of Shandong Province of China (Grant No. ZR2013EEZ001). We thank David Frishman, PhD, from Edanz Group China (www.liwenbianji.cn/ac) for editing the English text of a draft of this manuscript.
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Duan, H., Yang, Y. Deformation and Dissipated Energy of Sandstone Under Uniaxial Cyclic Loading. Geotech Geol Eng 36, 611–619 (2018). https://doi.org/10.1007/s10706-017-0306-9
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DOI: https://doi.org/10.1007/s10706-017-0306-9