Geomechanics and Engineering

  • 제23권5호
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  • Pages.467-480
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  • 2020
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  • 2005-307X(pISSN)
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  • 2092-6219(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Fracture properties and tensile strength of three typical sandstone materials under static and impact loads

  • Zhou, Lei (Key Laboratory of Deep Earth Science and Engineering (Ministry of Education), College of Architecture and Environment, Sichuan University) ;
  • Niu, Caoyuan (State Key Laboratory of Hydraulics and Mountain River Engineering, College of Architecture and Environment, Sichuan University) ;
  • Zhu, Zheming (State Key Laboratory of Hydraulics and Mountain River Engineering, College of Architecture and Environment, Sichuan University) ;
  • Ying, Peng (State Key Laboratory of Hydraulics and Mountain River Engineering, College of Architecture and Environment, Sichuan University) ;
  • Dong, Yuqing (State Key Laboratory of Hydraulics and Mountain River Engineering, College of Architecture and Environment, Sichuan University) ;
  • Deng, Shuai (State Key Laboratory of Hydraulics and Mountain River Engineering, College of Architecture and Environment, Sichuan University)
  • 투고 : 2019.10.24
  • 심사 : 2020.11.27
  • 발행 : 2020.12.10
⟨ 이전 논문 다음 논문 ⟩

초록

The failure behavior and tensile strength of sandstone materials under different strain rates are greatly different, especially under static loads and impact loads. In order to clearly investigate the failure mechanism of sandstone materials under static and impact loads, a series of Brazilian disc samples were used by employing green sandstone, red sandstone and black sandstone to carry out static and impact loading splitting tensile tests, and the failure properties subjected to two different loading conditions were analyzed and discussed. Subsequently, the failure behavior of sandstone materials also were simulated by finite element code. The good agreement between simulation results and experimental results can obtain the following significantly conclusions: (1) The relationship of the tensile strength among sandstone materials is that green sandstone < red sandstone < black sandstone, and the variation of the tensile sensitivity of sandstone materials is that green sandstone > red sandstone > black sandstone; (2) The mainly cause for the difference of dynamic tensile strength of sandstone materials is that the strength of crystal particles in sandstone material, and the tensile strength of sandstone is proportional to the fractal dimension; (3) The dynamic failure behavior of sandstone is greatly different from that of static failure behavior, and the dynamic tensile failure rate in dynamic failure behavior is about 54.92%.

키워드

과제정보

This work was financially supported by the National Natural Science Foundation of China (U19A2098); the project of Science and Technology of Sichuan province (21YYJC2845); Open fund of Key Laboratory of Deep Underground Science and Engineering (DESE202005); the Fundamental Research Funds for the Central Universities.

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