Geomechanics and Engineering

  • 제19권4호
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  • Pages.353-360
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  • 2019
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  • 2005-307X(pISSN)
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  • 2092-6219(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

DOI QR Code

Estimation of rock tensile and compressive moduli with Brazilian disc test

  • Wei, Jiong (Department of Engineering Mechanics and CNMM, School of Aerospace Engineering, Tsinghua University) ;
  • Niu, Leilei (Center of Rock Instability and Seismicity Research, School of Resources and Civil Engineering, Northeastern University) ;
  • Song, Jae-Joon (Department of Energy Resources Engineering, Research Institute of Energy and Resources, Seoul National University) ;
  • Xie, Linmao (Department of Energy Resources Engineering, Research Institute of Energy and Resources, Seoul National University)
  • 투고 : 2018.11.19
  • 심사 : 2019.11.14
  • 발행 : 2019.11.20
⟨ 이전 논문 다음 논문 ⟩

초록

The elastic modulus is an important parameter to characterize the property of rock. It is common knowledge that the strengths of rocks are significantly different under tension and compression. However, little attention has been paid to the bi-modularity of rock. To validate whether the rock elastic moduli in tension and compression are the same, Brazilian disc, direct tension and compression tests were conducted. A horizontal laser displacement meter and a pair of vertical and transverse strain gauges were applied. Four types of materials were tested, including three types of rock materials and one type of steel material. A comprehensive comparison of the elastic moduli based on different experimental results was presented, and a tension-compression anisotropy model was proposed to explain the experimental results. The results from this study indicate that the rock elastic modulus is different under tension and compression. The ratio of the rock elastic moduli under compression and tension ranges from 2 to 4. The rock tensile moduli from the strain data and displacement data are approximate. The elastic moduli from the Brazilian disc test are consistent with those from the uniaxial tension and compression tests. The Brazilian disc test is a convenient method for estimating the tensile and compressive moduli of rock materials.

키워드

과제정보

연구 과제 주관 기관 : Korea Institute of Energy Technology Evaluation and Planning (KETEP)

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피인용 문헌

  1. Estimation of tensile strength and moduli of a tension-compression bi-modular rock vol.24, pp.4, 2021, https://doi.org/10.12989/gae.2021.24.4.349