Bar diameter effect of minimum loading strain rate in granite impacting tests by SHPB

Hong Liang; Jin Zhi-ren; Deng Zong-wei

doi:10.11883/1001-1455(2014)03-0328-06

Volume 34 Issue 3

Aug. 2014

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Hong Liang, Jin Zhi-ren, Deng Zong-wei. Bar diameter effect of minimum loading strain rate in granite impacting tests by SHPB[J]. Explosion And Shock Waves, 2014, 34(3): 328-333. doi: 10.11883/1001-1455(2014)03-0328-06

Citation:

Hong Liang, Jin Zhi-ren, Deng Zong-wei. Bar diameter effect of minimum loading strain rate in granite impacting tests by SHPB[J]. Explosion And Shock Waves, 2014, 34(3): 328-333. doi: 10.11883/1001-1455(2014)03-0328-06

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Bar diameter effect of minimum loading strain rate in granite impacting tests by SHPB

doi: 10.11883/1001-1455(2014)03-0328-06

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

Received Date: 2012-11-15
Rev Recd Date: 2013-01-07
Publish Date: 2014-05-25

Abstract

Abstract

The relationship between elastic bar diameter of split Hopkinson pressure bar(SHPB) systems and the minimum strain rate causing rock failure under once impact with half-sine stress wave loads, is analyzed based on the Steverding-Lehnigk fracture criterion of brittle materials.The tests were carried out at different strain rates from high to low on the SHPB systems with different elastic bar diameters of 22, 36, 50 and 75 mm.Granite was used in these tests, and its size varies with the elastic bar diameter.The variation law of the lowest strain rate with the elastic bar diameter was discussed.The theoretical and experimental results show that the lowest strain rate of rock decreases with the increase of the elastic bar diameter in power relation.However, the bar diameter has already exceeded 100 mm when the strain rate decreases to the order of 10 ⁰ s^-1, and the effect of decreasing strain rate by increasing bar diameter turns to be less evident.
- solid mechanics,
- bar diameter effect,
- SHPB test,
- strain rate

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References(16)

References

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