Geomechanics and Engineering

  • 제27권4호
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  • Pages.347-359
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  • 2021
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  • 2005-307X(pISSN)
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  • 2092-6219(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Acoustic emission characteristics of marble under uniaxial cyclic loading

  • Fu, Bin (State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology) ;
  • Tang, Chun'an (State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology)
  • 투고 : 2020.05.11
  • 심사 : 2021.10.18
  • 발행 : 2021.11.25
⟨ 이전 논문 다음 논문 ⟩

초록

Intractable rock engineering problems encountered in practice are related to the behavior of rocks under different cyclic loadings, the damage evolution of rock subjected to cyclic loading is important for rock engineering design and construction. Three different cyclic loadings were conducted on marble to explore the acoustic emission (AE) parameters evolution during damage. It was found that the continuous decreasing correlation dimension and b value can be deemed as robust signal of the imminent rock failure. The additional cyclic loadings increase the AE events with low energy. The Realistic Failure Process Analysis (RFPA2D) code was implemented to reproduce the AE distribution evolution of the corresponding experiments. Numerical simulations indicate that the AE distribution changes from random to aggregate. The increasing stress leads to the failure mode of sample shifts from shear damage dominated to tensile damage dominant. The additional cyclic loadings increase the number of the shear damage elements.

키워드

과제정보

This work was supported by the National Key Research and Development Plan (Grant No. 2018YFC1505301), for which the authors are very grateful.

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