Dynamic responses of sand wall under planar shock loading

WANG Hongliang; TIAN Zhou; PU Xifeng; YAO Chengbao; SHOU liefeng

doi:10.11883/bzycj-2018-0179

Volume 39 Issue 7

Jul. 2019

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WANG Hongliang, TIAN Zhou, PU Xifeng, YAO Chengbao, SHOU liefeng. Dynamic responses of sand wall under planar shock loading[J]. Explosion And Shock Waves, 2019, 39(7): 072201. doi: 10.11883/bzycj-2018-0179

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Dynamic responses of sand wall under planar shock loading

doi: 10.11883/bzycj-2018-0179

1.
Northwest Institute of Nuclear Technology, Xi’an 710024, Shaanxi, China
2.
State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China
3.
School of Mathematical Sciences, Peking University, Beijing 100871, China

Received Date: 2018-05-25
Rev Recd Date: 2018-07-23

Available Online: 2019-06-25

Publish Date: 2019-07-01

Abstract

Abstract

In order to study the dynamic response behavior of a sand wall in the process of the shock-sand wall interaction, experiments are carried out in a horizontal shock tube. A high-speed schlieren imaging system is used to capture the instantaneous structures of shock wave and moving process of the sand wall in the flow field. The incident shock Mach number ranges from 1.827 to 2.413, and the incident shock strength ranges from 0.378 MPa to 0.724 MPa. Three different kinds of sand walls are constructed using well-size-distributed iron sand, bauxite sand and quartz sand, the corresponding porosities of these sand walls are 56.6%, 69.3% and 56.6%, respectively. High-speed schlieren photographs show that regular reflection occurs when the incident shock wave impacts the sand wall. Moreover, the sand wall does not move significantly until the hundreds of microseconds after the onset of the interaction, indicating that the dynamic response behavior of the sand wall is similar to that of a rigid body. Basing on the shock wave theory, the Hugoniot relations for sand walls made from three different materials are established. The bulk elastic moduli of iron-, bauxite- and quartz-sand walls are 0.913, 0.478, and 0.225 GPa, respectively. The constant λ in the Hugoniot relations is on the order of 100. It is concluded that the relatively low shock impacting majorly leads to the volume deformation of the sand wall, and the heat effect of the sand wall caused by shock loading may be unimportant.
- planar shock wave,
- sand wall,
- dynamic response,
- high-speed schlieren

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References

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