Determination of spalling strength of rock by incident waveform
Ming Tao,Huatao Zhao,Xibing Li,Jialu Ma,Kun Du,Xiaofeng Xie
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.
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.
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