Journal
THEORETICAL AND APPLIED FRACTURE MECHANICS
Volume 104, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.tafmec.2019.102394
Keywords
Side flaw; Tunnel-shaped opening; Uniaxial compression; Cracking; Principal stress distribution
Categories
Funding
- National Natural Science Foundation of China [41807241, 51978064]
- Natural Science Basic Research Plan of Shaanxi Province [2018JQ4015]
- Fundamental Research Funds for the Central Universities, CHD [300102219110, 300102219208]
- Open Fund of Engineering Research Center of Catastrophic Prophylaxis and Treatment of Road & Traffic Safety of Ministry of Education (Changsha University of Science Technology) [kfj170406]
- Research Fund of Department of Transportation of Zhejiang Province [2016019, 2019043]
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In this study, uniaxial compression tests were conducted on granite specimens containing two side flaws. Based on the experimental results, the numerical models containing two side flaws and a tunnel-shaped opening were created to investigate the peak stress, cracking process and stress distribution under uniaxial compression. It is found that the flaw inclination angle strongly affects the strength, cracking process and stress distribution, while the slight change of the opening shape has little influence. The cracks initiate from the flaw tips and the top and bottom of openings. Unlike the case of a circular opening, in addition to arch waists, large compressive stress occurs at the arch foots of the tunnel-shaped opening.
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