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Fracture mechanical behavior and acoustic emission evolution characteristics of red sandstone under different moisture conditions

Author

Listed:
  • Hao Liu

    (Jiangxi University of Science and Technology
    Jiangxi University of Science and Technology)

  • Congming Li

    (Jiangxi University of Science and Technology
    Jiangxi University of Science and Technology)

  • Yanda Li

    (Jiangxi University of Science and Technology
    Jiangxi University of Science and Technology)

  • Kui Zhao

    (Jiangxi University of Science and Technology
    Jiangxi University of Science and Technology)

  • Daoxue Yang

    (Jiangxi University of Science and Technology
    Jiangxi University of Science and Technology)

  • Wen Zhong

    (Jiangxi University of Science and Technology
    Jiangxi University of Science and Technology)

  • Qixiong Gu

    (Jiangxi University of Science and Technology
    Jiangxi University of Science and Technology)

Abstract

In order to explore the effect of moisture content on the fracture mechanical behavior and acoustic emission (AE) evolution characteristics of red sandstone Mode I and II. The fracture toughness of 24 red sandstone samples with different moisture content (dry, natural and saturated) was determined by the fracture test of Cracked Chevron Notched Brazilian Disc (CCNBD). The results showed that: Fracture toughness of red sandstone decreases as an exponential function of increasing water content. The KIIC and initial crack initiation direction of red sandstone can be determined by the generalised maximum stress criterion (GMTS) and Mode I. The RA-AF value of AE signal can better reflect the propagation of shear cracks and tension cracks in the samples under different moisture content. The non-uniform distribution of microscopic defects inside the red sandstone specimen results in a large number of tensile cracks in the CCNBD specimen during the Mode II fracture process.

Suggested Citation

  • Hao Liu & Congming Li & Yanda Li & Kui Zhao & Daoxue Yang & Wen Zhong & Qixiong Gu, 2025. "Fracture mechanical behavior and acoustic emission evolution characteristics of red sandstone under different moisture conditions," 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. 121(9), pages 11079-11094, May.
    • Handle: RePEc:spr:nathaz:v:121:y:2025:i:9:d:10.1007_s11069-025-07240-0
    DOI: 10.1007/s11069-025-07240-0
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