Geomechanics and Engineering

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Determination of spalling strength of rock by incident waveform

  • Tao, Ming (School of Resources and Safety Engineering, Central South University) ;
  • Zhao, Huatao (School of Resources and Safety Engineering, Central South University) ;
  • Li, Xibing (School of Resources and Safety Engineering, Central South University) ;
  • Ma, Jialu (Institute of Engineering mechanics, China Earthquake Administration) ;
  • Du, Kun (School of Resources and Safety Engineering, Central South University) ;
  • Xie, Xiaofeng (School of Resources and Safety Engineering, Central South University)
  • Received : 2016.03.03
  • Accepted : 2016.09.18
  • Published : 2017.01.25
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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.

Keywords

Acknowledgement

Supported by : National Natural Science Foundation of China, Central South University

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