Explosion morphology and impacting effects of shallow-buried explosives

ZHAO Zhenyu; ZHOU Yilai; REN Jianwei; LU Tianjian

doi:10.11883/bzycj-2021-0376

Volume 42 Issue 4

May 2022

Turn off MathJax

Article Contents

Article Navigation > Explosion And Shock Waves > 2022 > 42(4): 042303

ZHAO Zhenyu, ZHOU Yilai, REN Jianwei, LU Tianjian. Explosion morphology and impacting effects of shallow-buried explosives[J]. Explosion And Shock Waves, 2022, 42(4): 042303. doi: 10.11883/bzycj-2021-0376

Citation:

ZHAO Zhenyu, ZHOU Yilai, REN Jianwei, LU Tianjian. Explosion morphology and impacting effects of shallow-buried explosives[J]. Explosion And Shock Waves, 2022, 42(4): 042303. doi: 10.11883/bzycj-2021-0376

Citation:

PDF( 19062 KB)

Explosion morphology and impacting effects of shallow-buried explosives

doi: 10.11883/bzycj-2021-0376

ZHAO Zhenyu^{1, 2
,},
ZHOU Yilai^{1, 2},
REN Jianwei^{1, 2},
LU Tianjian^{1, 2
,
,}

1.
State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, Jiangsu, China
2.
MIIT Key Laboratory of Multifunctional Lightweight Materials and Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, Jiangsu, China

Received Date: 2021-09-08
Rev Recd Date: 2021-10-02

Available Online: 2022-03-10

Publish Date: 2022-05-09

Abstract

Abstract

In modern warfare, shallow-buried explosives, such as landmines and improvised explosive devices, pose serious threats to civil/military vehicles and passengers. To study the explosion morphology and impacting effects of shallow-buried explosives (TNT), a novel set of test facility was proposed in this study and used to perform shallow-buried sand explosion tests. By changing the type of sand and the buried depth of the explosives, the propagation of shock wave, the ejection trajectory of explosion products and sand, the deformation morphology of target plate, and the spatial distribution of explosion load were systematically investigated. It was demonstrated that shallow-buried sand explosion generated a shock wave in air, with a propagation velocity significantly greater than the ejection velocity of explosion products and sand. Upon detonation, the explosion products and sand were rapidly ejected outwards with continuously increasing volume, and spread around after hitting the target plate. The impulse generated by shallow-buried sand explosion was non-uniformly distributed in space, largest in the central explosion area and gradually decreasing outwards. The buried depth of explosives in sand affected the relative position of explosive products and sand when they were ejected. When the buried depth was relatively small, the explosive products would break through the covered sand layer and directly act on the target plate. When the buried depth was sufficiently large, the explosive products were essentially covered by a sand layer, which acted on the target plate together at a delayed instant. The type of sand used significantly affected the deformation morphology of the target plate. The sand purposely prepared in accordance with the NATO standard AEP-55 not only caused overall bending deformation of the target plate, but also formed a large number of pits on the target plate, thus generating a penetration effect. In contrast, the ordinary river sand only caused overall bending deformation of the target plate, with little penetration effect observed. The results obtained in this study are helpful for designing more effective protective structures against intense blast impacting from shallow-buried explosives.
- shallow-buried explosion,
- new test facility,
- shock wave,
- jet trajectory,
- impulse distribution

FullText(HTML)

References(15)

References

[1]	张钱城, 郝方楠, 李裕春, 等. 爆炸冲击载荷作用下车辆和人员的损伤与防护 [J]. 力学与实践, 2014, 36(5): 527–539. DOI: 10.6052/1000-0879-13-539. ZHANG Q C, HAO F N, LI Y C, et al. Research progress in the injury and protection to vehicle and passengers under explosive shock loading [J]. Mechanics in Engineering, 2014, 36(5): 527–539. DOI: 10.6052/1000-0879-13-539.
[2]	HWANG J, JUNG Y, HOFMANN U, et al. Global mapping and analysis of anti-vehicle mine incidents in 2018: GICHD–SIPRI [R]. Geneva, Switzerland, 2019.
[3]	Landmine monitor 2015 [R]. International campaign to ban landmines—Cluster Munition Coalition, 2015. http://www.the-monitor.org/media/2152583/Landmine-Monitor-2015_finalpdf.pdf.
[4]	赵振宇, 任建伟, 金峰, 等. 浅埋炸药爆炸动力学研究进展 [J]. 应用力学学报, 2022(1): 1–11. DOI: 10.11776/j.issn.1000-4939.2022.01.001. ZHAO Z Y, REN J W, JIN F, et al. Progress in research on explosion dynamics of shallow-buried explosives [J]. Chinese Journal of Applied Mechanics, 2022(1): 1–11. DOI: 10.11776/j.issn.1000-4939.2022.01.001.
[5]	LINFORTH S, TRAN P, RUPASINGHE M, et al. Unsaturated Soil blast: flying plate experiment and numerical investigations [J]. International Journal of Impact Engineering, 2019, 125: 212–228. DOI: 10.1016/j.ijimpeng.2018.08.002.
[6]	DESHPANDE V S, MCMEEKING R M, WADLEY H N G, et al. Constitutive model for predicting dynamic interactions between soil ejecta and structural panels [J]. Journal of the Mechanics and Physics of Solids, 2009, 57(8): 1139–1164. DOI: 10.1016/j.jmps.2009.05.001.
[7]	WESTINE P S, MORRIS B L, COX P A, et al. Development of computer program for floor plate response from land mine explosions [R]. Warren: US Army Tank-Automotive Command, 1985.
[8]	GRUJICIC M, GLOMSKI P, CHEESEMAN B. Dimensional analysis of impulse loading resulting from detonation of shallow-buried charges [J]. Multidiscipline Modeling in Materials and Structures, 2013, 9(3): 367–390. DOI: 10.1108/mmms-01-2013-0002.
[9]	DENEFELD V, HEIDER N, HOLZWARTH A. Measurement of the spatial specific impulse distribution due to buried high explosive charge detonation [J]. Defence Technology, 2017, 13(3): 219–227. DOI: 10.1016/j.dt.2017.03.002.
[10]	RIGBY S E, FAY S D, CLARKE S D, et al. Measuring spatial pressure distribution from explosives buried in dry Leighton Buzzard sand [J]. International Journal of Impact Engineering, 2016, 96: 89–104. DOI: 10.1016/j.ijimpeng.2016.05.004.
[11]	RIGBY S E, FAY S D, TYAS A, et al. Influence of particle size distribution on the blast pressure profile from explosives buried in saturated soils [J]. Shock Waves, 2018, 28(3): 613–626. DOI: 10.1007/s00193-017-0727-7.
[12]	CLARKE S D, FAY S D, WARREN J A, et al. A large scale experimental approach to the measurement of spatially and temporally localised loading from the detonation of shallow-buried explosives [J]. Measurement Science and Technology, 2015, 26(1): 015001. DOI: 10.1088/0957-0233/26/1/015001.
[13]	PICKERING E G, YUEN S C K, NURICK G N, et al. The response of quadrangular plates to buried charges [J]. International Journal of Impact Engineering, 2012, 49: 103–114. DOI: 10.1016/j.ijimpeng.2012.05.007.
[14]	ROGER E, LORET B, CALVEL J P. Detonation of small charges buried in cohesionless soil [M]//SCIAMMARELLA C, CONSIDINE J, GLOECKNER P. Experimental and Applied Mechanics. Cham: Springer, 2016: 107–114. DOI: 10.1007/978-3-319-22449-7_13.
[15]	CLARKE S D, FAY S D, WARREN J A, et al. Predicting the role of geotechnical parameters on the output from shallow buried explosives [J]. International Journal of Impact Engineering, 2017, 102: 117–128. DOI: 10.1016/j.ijimpeng.2016.12.006.