Experimental techniques of SHPB for calcareous sand and its dynamic behaviors

LYU Yaru; WANG Mingyang; WEI Jiuqi; LIAO Bin

doi:10.11883/bzycj-2017-0179

Volume 38 Issue 6

Sep. 2018

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LYU Yaru, WANG Mingyang, WEI Jiuqi, LIAO Bin. Experimental techniques of SHPB for calcareous sand and its dynamic behaviors[J]. Explosion And Shock Waves, 2018, 38(6): 1262-1270. doi: 10.11883/bzycj-2017-0179

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LYU Yaru, WANG Mingyang, WEI Jiuqi, LIAO Bin. Experimental techniques of SHPB for calcareous sand and its dynamic behaviors[J]. Explosion And Shock Waves, 2018, 38(6): 1262-1270. doi: 10.11883/bzycj-2017-0179

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Experimental techniques of SHPB for calcareous sand and its dynamic behaviors

doi: 10.11883/bzycj-2017-0179

LYU Yaru^{1, 2, 3},
WANG Mingyang^{3
,
,},
WEI Jiuqi³,
LIAO Bin³

1.
College of Mechanics and Materials, Hohai University, Nanjing 210098, Jiangsu, China
2.
Department of Civil and Environmental Engineering, Hong Kong University of Science and Technology, Hong Kong 999077, China
3.
State Key Laboratory of Disaster Prevention & Mitigation of Explosion & Impact, Army Engineering University of PLA, Nanjing 210007, Jiangsu, China

Received Date: 2017-05-22
Rev Recd Date: 2017-06-15
Publish Date: 2018-11-25

Abstract

Abstract

This paper conducted 11 split Hopkinson pressure bar (SHPB) tests on the calcareous sand sampled from a calcareous reef in China and silica sand sampled from Fujian Provence of China. The relative density is 90%. The strain-rate history, strain history, and stress-strain curves were obtained for sand specimens with three thicknesses including 10 mm, 30 mm and 50 mm. It is found that test error can be reduced by standard procedure in sand preparation. The stress equilibrium and constant strain rate can be achieved by changing the thickness of specimen, the length of striker and the pulse shaper. With an identical relative density and loading condition, the volumetric modulus and shear modulus of calcareous sand is approximately 10% of the silica sand; and the strength of the calcareous sand is approximately 30% of the silica sand. Therefore, the results of existing silica sand can not be directly applied to calcareous sand because of their large discrepancies.
- calcareous sand,
- split Hopkinson pressure bar,
- impact behavior,
- stress-train curve

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References(23)

References

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