Techno Press
You logged in as Techno Press

Geomechanics and Engineering
  Volume 12, Number 1, January 2017 , pages 1-8
DOI: https://doi.org/10.12989/gae.2017.12.1.001
 


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

Techno-Press: Publishers of international journals and conference proceedings.       Copyright © 2022 Techno Press
P.O. Box 33, Yuseong, Daejeon 305-600 Korea, Tel: +82-42-828-7996, Fax : +82-42-828-7997, Email: info@techno-press.com