Dynamic compression behavior of rock and simulation of damage effects of hypervelocity kinetic energy bomb

WANG Mingyang; LI Jie; LI Haibo; QIU Yanyu

doi:10.11883/bzycj-2018-0173

Volume 38 Issue 6

Sep. 2018

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WANG Mingyang, LI Jie, LI Haibo, QIU Yanyu. Dynamic compression behavior of rock and simulation of damage effects of hypervelocity kinetic energy bomb[J]. Explosion And Shock Waves, 2018, 38(6): 1200-1217. doi: 10.11883/bzycj-2018-0173

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WANG Mingyang, LI Jie, LI Haibo, QIU Yanyu. Dynamic compression behavior of rock and simulation of damage effects of hypervelocity kinetic energy bomb[J]. Explosion And Shock Waves, 2018, 38(6): 1200-1217. doi: 10.11883/bzycj-2018-0173

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Dynamic compression behavior of rock and simulation of damage effects of hypervelocity kinetic energy bomb

doi: 10.11883/bzycj-2018-0173

WANG Mingyang^{1, 2},
LI Jie^{1, 2
,
,},
LI Haibo³,
QIU Yanyu^{1, 2}

1.
State Key Laboratory of Explosion & Impact and Disaster Prevention & Mitigation, Army Engineering University of PLA, Nanjing 210007, Jiangsu, China
2.
School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China
3.
State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, Hubei, China

Received Date: 2018-05-23
Rev Recd Date: 2018-07-05
Publish Date: 2018-11-25

Abstract

Abstract

The hypervelocity kinetic energy weapon that strikes the ground at the speed from 5 Mach to 15 Mach has some unique characteristics of penetration mechanism and damage effects, which cannot be accurately described by ths existing theories.In this paper, the dynamic compressibility behavior of rock, penetration and explosion effects in the near zone is systematically summarized.It is found that the actual stress in the rock impacted under velocity of 5 Mach to 15 Mach is between fluid state and elasto-plasticity state.A theoretical model of hydro-elastoplastic-frictional penetration model is proposed, which fills the gap of stress state between elastic-plastic state and hydro-dynamic state.For the first time, the impedance formula is obtained, which can describe the stress state of whole interaction process between target and projectile.The minimum kinetic energy threshold of solid penetration, pseudofluid penetration and fluid penetration is defined.The methods for calculating hypervelocity impact effects including penetration depth, crater radius and the safety thickness of protective layer are proposed in the paper.In addition, the accuracy of the theoretical formula is verified by a series of penetration tests with the impact speed from 1 100 m/s to 4 200 m/s.
- hypervelocity kinetic energy weapon,
- internal friction,
- penetration depth,
- impact crater

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References(34)

References

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