DOI QR코드

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Measurement of the mixed mode fracture strength of green sandstone using three-point bending specimens

  • Li, Yifan (Department of Mechanical Engineering, University of Bristol) ;
  • Dong, Shiming (College of Architecture and Environment, Sichuan University) ;
  • Pavier, Martyn J. (Department of Mechanical Engineering, University of Bristol)
  • 투고 : 2019.08.29
  • 심사 : 2019.12.23
  • 발행 : 2020.01.10

초록

Three-point bending specimens have been used to investigate the mixed mode fracture of green sandstone. Dimensionless stress intensity factors and T-stresses were calculated first by using the finite element method for various crack lengths, crack angles and span to length ratios. It is shown that three-point bending specimens can provide the whole range of mode mixities from pure mode I to pure mode II, provided suitable values are chosen for the crack angle and span to length ratio. The fracture test results were also used to compare with predictions of different criteria. These comparisons show that modified criteria including the influence of the T-stress agree better with experiment than the conventional criteria but that no one criterion matches perfectly the test results.

키워드

참고문헌

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피인용 문헌

  1. Experimental and numerical analysis of mixed mode I/III fracture of sandstone using three-point bending specimens vol.76, pp.6, 2020, https://doi.org/10.12989/sem.2020.76.6.725