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Effect of frequency on rock’s mechanical responses under multi-level compressive cyclic loading: an experimental investigation

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Abstract

This article aims to investigate the impact of frequency sequence on mechanical responses of sandstone exposed to multi-level compressive cyclic loading. Two modes were used with three levels of low frequencies (0.1, 0.2, and 0.4 Hz) in incremental or decremental sequences. The analysis was made on rock deformation, energy characteristics and stress–strain phase shift. The experimental results show that frequency sequence has a significant effect on various types of mechanical properties. The decremental frequency causes a greater growth in axial strain at maximum cyclic stress than at the minimum stress. The input and elastic energy are enhanced under incremental frequency sequence, while decremental frequency results in a higher occurrence ratio of phase lag, particularly in the radial direction. These experimental findings can help to deepen the understanding of rock fatigue from the view of frequency sequence.

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The data supporting the findings of this study can be accessed upon request. Interested researchers are invited to contact the corresponding author.

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Funding

The paper is supported by the Open Fund of State Key Laboratory of Mining-induced Response and Disaster Prevention and Control in Deep Coal Mines (Grant No. SKLMRDPC21KF08), NSFC (Grant No. 52204086), Research Grant of Joint National-local Engineering Research Centre for Safe and Precise Coal Mining (Grant No. EC2021004), and Fundamental Research Funds for the Central Universities (Grant No. 06500182), Grant from Humboldt Research Fellowship, Young Talents International Exchange and Growth Program in USTB (Grant No. QNXM20220007). 

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Correspondence to Zhengyang Song.

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Song, Z., Wang, C., Zhao, Y. et al. Effect of frequency on rock’s mechanical responses under multi-level compressive cyclic loading: an experimental investigation. Bull Eng Geol Environ 82, 224 (2023). https://doi.org/10.1007/s10064-023-03263-8

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  • DOI: https://doi.org/10.1007/s10064-023-03263-8

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