自然科学版 英文版
自然科学版 英文版
自然科学版 英文版

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中南大学学报(英文版)

Journal of Central South University

Vol. 15    No. 2    April 2008

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Relationship between diameter of split Hopkinson pressure bar and minimum loading rate under rock failure
LI Xi-bing(李夕兵)1, HONG Liang(洪 亮)1, 2, YIN Tu-bing(尹土兵)1,ZHOU Zi-long(周子龙)1, YE Zhou-yuan(叶洲元)1

1. School of Resources and Safety Engineering, Central South University, Changsha 410083, China;2. Department of Civil Engineering, Hunan City University, Yiyang 413000, China

Abstract:In order to investigate the relationship between bar diameter and loading rate of the split Hopkinson pressure bar(SHPB) setup under the failure of rock specimen and realize the medium strain rate loading of specimen, new SHPB setups with different elastic bar’s diameters of 22, 36, 50 and 75 mm were constructed. The tests were carried out on these setups at different loading rates, and the specimens had the same diameter of elastic bars and same ratio of length to diameter. The test results show that the larger the elastic bar’s diameter is, the less the loading rate is needed to cause specimen failure, they show good power relationship, and that under the same strain rate loading, specimens are broken more seriously with larger diameter SHPB setup than with smaller one.

 

Key words: rock failure; Hopkinson pressure bar; diameter; minimum loading rate; medium strain rate

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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