Geomechanics and Engineering

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Study on fracture mechanics of granite specimens with different precast notch depths based on DIC method

  • Shuwen Cao (School of Science, Xi'an University of Architecture and Technology) ;
  • Hao Shu (School of Science, Xi'an University of Architecture and Technology)
  • Received : 2022.10.10
  • Accepted : 2023.03.22
  • Published : 2023.05.25
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Abstract

Displacements near crack and stress intensity factor (SIF) are key parameters to solve rock failure issue when using fracture mechanics. In order to study the horizontal displacement and stress intensity factor of the mode I fracture, a series of three-point bending tests of granite specimens with central notch were carried out. The evolution of horizontal displacements of precast notch and crack tip opening displacements (CTOD) were analyzed based on the digital image correlation (DIC) method. Stress intensity factors for three-point bending beams with arbitrary span-to-width ratios(S/W) were calculated by using the WU-Carlsson analytical weight function for edge-crack finite width plate and the analytical solution of un-cracked stress by Filon. The present study provides a high efficient and accurate method for fracture mechanics analysis of the three-point bending granite beams.

Keywords

Acknowledgement

The research described in this paper was financially supported by the Special Fund of Shaanxi Education Department (Grant No.20JK0711), which were highly appreciated by the authors.

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