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Geomechanics and Engineering Volume 12, Number 1, January 2017 , pages 1-8 DOI: https://doi.org/10.12989/gae.2017.12.1.001 |
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Determination of spalling strength of rock by incident waveform |
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Ming Tao, Huatao Zhao, Xibing Li, Jialu Ma, Kun Du and Xiaofeng Xie
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| Abstract | ||
| An experimental technique for determining the spalling strength of rock-like materials under a high strain rate is developed. It is observed that the spalling strength of a specimen can be determined by only knowing the wavelength, loading peak value and length of the first spallation of an incident wave under a specific loading waveform. Using this method in combination with a split-Hopkinson pressure bar (SHPB) and other experimental devices, the spalling strength of granite specimens under a high strain rate is tested. Comparisons with other experimental results show that the new measuring method can accurately calculate the dynamic tensile strength of rock materials under a high strain rate. | ||
| Key Words | ||
| Hopkinson bar; spalling; incident waveform; dynamic tensile strength | ||
| Address | ||
| Ming Tao, Huatao Zhao, Xibing Li, Jialu Ma, Kun Du and Xiaofeng Xie (1) Ming Tao, Huatao Zhao, Xibing Li, Kun Du, Xiaofeng Xie: School of Resources and Safety Engineering, Central South University, Changsha, Hunan, China; (2) Ming Tao: Western Mining Co., LTD, Qinghai Key Laboratory of Plateau Comprehensive Utilization and Mineral Processing Engineering, Xining, China; (3) Jialu Ma: Institute of Engineering mechanics, China Earthquake Administration. | ||