A volume stress correction method for SHPB passiveconfined pressure of granular materials

WEI Jiuqi; ZHANG Chunxiao; CAO Shaohua; WANG Shihe; LI Lei

doi:10.11883/bzycj-2019-0411

Volume 40 Issue 12

Dec. 2020

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WEI Jiuqi, ZHANG Chunxiao, CAO Shaohua, WANG Shihe, LI Lei. A volume stress correction method for SHPB passiveconfined pressure of granular materials[J]. Explosion And Shock Waves, 2020, 40(12): 124201. doi: 10.11883/bzycj-2019-0411

Citation:

WEI Jiuqi, ZHANG Chunxiao, CAO Shaohua, WANG Shihe, LI Lei. A volume stress correction method for SHPB passiveconfined pressure of granular materials[J]. Explosion And Shock Waves, 2020, 40(12): 124201. doi: 10.11883/bzycj-2019-0411

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A volume stress correction method for SHPB passiveconfined pressure of granular materials

doi: 10.11883/bzycj-2019-0411

WEI Jiuqi^{1, 2
,},
ZHANG Chunxiao^{1, 2
,
,},
CAO Shaohua^{1, 2},
WANG Shihe^{1, 2},
LI Lei^{1, 2}

1.
Institute of Engineering Protection, IDE, AMS, PLA, Luoyang 471023, Henan, china
2.
Henan Key Laboratory of Special Protective Materials, Luoyang 471023, Henan, China

Received Date: 2019-10-24
Rev Recd Date: 2020-01-19
Publish Date: 2020-12-05

Abstract

Abstract

Aiming to overcome the disadvantages and demerits in the stress calculation in the passive confinement pressure SHPB tests of granular materials, a numerical modified approach is proposed in the present paper. The modified approach is also verified by finite element numerical simulation and experimental results. The results show that when the length of specimen is much shorter than the length of thick-walled hollow cylinder, the edge effects will lead to a non-uniform distribution of deformation along the length of hollow cylinder. Therefore, the configuration of thick-walled cannot be simplified as a plain stress problem when calculating the stress and deformation state of granular material. Due to the fact that the thick-walled hollow cylinder is elastic, the real radial stress in the hollow cylinder is proportional to the theoretical predictions. The proportionality coefficient has a quadratic function relation with the length of specimen.
- granular materials,
- SHPB test,
- volume stress,
- conversion coefficient

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References(20)

References

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