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Geomechanics and Engineering Volume 33, Number 4, May25 2023 , pages 393-400 DOI: https://doi.org/10.12989/gae.2023.33.4.393 |
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Study on fracture mechanics of granite specimens with different precast notch depths based on DIC method |
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Shuwen Cao and Hao Shu
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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. | ||
| Key Words | ||
| digital image correlation; horizontal displacements; three-point bending; stress intensity factor; weight | ||
| Address | ||
| Shuwen Cao and Hao Shu: School of Science, Xi | ||