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Dynamic Mechanical Properties and Failure Characteristics of Sandstone with Pre-Flaws Parallel to the Loading Direction

Author

Listed:
  • Ziyun Li

    (Chongqing Key Laboratory of Energy Engineering Mechanics & Disaster Prevention and Mitigation, Chongqing University of Science and Technology, Chongqing 401331, China)

  • Yunhui Zhu

    (Chongqing Key Laboratory of Energy Engineering Mechanics & Disaster Prevention and Mitigation, Chongqing University of Science and Technology, Chongqing 401331, China)

  • Qianghui Song

    (Chongqing Key Laboratory of Geomechanics & Geoenvironment Protection, Army Logistics University of PLA, Chongqing 401311, China)

  • Peiyong Wang

    (Chongqing Key Laboratory of Geomechanics & Geoenvironment Protection, Army Logistics University of PLA, Chongqing 401311, China)

  • Dongyan Liu

    (School of Civil Engineering, Chongqing University, Chongqing 400044, China
    Architectural and Engineering Institute, Chongqing College of Architecture and Technology, Chongqing 401331, China)

Abstract

Investigations on rock dynamics have been comprehensively focused on when the dynamic impact is perpendicular to the trend of the flaws, while understanding the dynamic mechanical properties and failure characteristics of rock with pre-flaws parallel to the loading direction remains unrevealed. In this study, impact tests are performed to experimentally study the dynamic mechanical properties, failure characteristics, and energy evolution of pre-flawed sandstone using the split Hopkinson pressure bar (SHPB) apparatus, in which the pre-flaws are parallel to the loading direction. The results show that for specimens, the dynamic loading rate and the number of flaws greatly influence the dynamic strength, peak strain, energy absorption rate, and failure behaviors. The dynamic strength increases exponentially with an increase in loading rate and decreases with an increase in flaw numbers. The fractal dimension of triple-flawed specimens is the largest at the same loading rate range. The failure modes of different pre-flawed specimens show a transition from tensile failure to tensile-shear failure with the increase of dynamic loading rate.

Suggested Citation

  • Ziyun Li & Yunhui Zhu & Qianghui Song & Peiyong Wang & Dongyan Liu, 2023. "Dynamic Mechanical Properties and Failure Characteristics of Sandstone with Pre-Flaws Parallel to the Loading Direction," Sustainability, MDPI, vol. 15(4), pages 1-19, February.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:4:p:3587-:d:1069528
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    References listed on IDEAS

    as
    1. Yanqi Song & Hongfa Ma & Jiangkun Yang & Junjie Zheng & Juntao Yang & Wei Bao, 2022. "Dynamic Mechanical Behaviors and Failure Mechanism of Lignite under SHPB Compression Test," Sustainability, MDPI, vol. 14(17), pages 1-19, August.
    2. Guoqing Chen & Tianbin Li & Guofeng Zhang & Hongyu Yin & Hang Zhang, 2014. "Temperature effect of rock burst for hard rock in deep-buried tunnel," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 72(2), pages 915-926, June.
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    Cited by:

    1. Kamil Mucha, 2023. "Application of Rock Abrasiveness and Rock Abrasivity Test Methods—A Review," Sustainability, MDPI, vol. 15(14), pages 1-21, July.

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