An Analytical Extension of the Critical Energy Criterion Used to Predict Bare Explosive Response to Jet Attack

Peugeot, F.; Quidot, M.; Presles, Henri‐Nöel

doi:10.1002/(sici)1521-4087(199806)23:3<117::aid-prep117>3.0.co;2-p

Cited by 4 publications

(3 citation statements)

References 5 publications

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“…By substituting and integrating Equations (15)(16)(17)(18)(19) into Equation ( 14), the dynamic term is obtained as…”

Section: Materials Flow In Cover Platementioning

confidence: 99%

“…Mader conducted a simulation study on the desensitization of CompB impacted by a jet. Peugeot [16] approximated the jet as a round-headed rod and established a theoretical model and critical criterion for the jet impacting bare explosive based on the critical energy criterion. The criterion is suitable for the low and intermediate impact velocity ranges and larger diameter jets.…”

Section: Introductionmentioning

confidence: 99%

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Critical Initiation Threshold of Covered Finite Thickness Explosive under Impact of Shaped Charge Jet

Chen

Jia

Xia

et al. 2021

Propellants Explo Pyrotec

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The compression depth of explosives is obtained on the basis of Lee penetration equation and the upper bound method to analyze the critical initiation threshold of finite thickness explosives. According to the pop curve, a theoretical model that reflects the relationship between critical initiation threshold and explosive thickness is established. Numerical simulation was carried out to simulate the initiation process and initiation threshold of explosives with different cover plate thicknesses. At the same time, we combine with the experimental data, to compare with the theoretical results. The calculations are in good agreement with data. Results show that the height of the bulge on the back of the cover plate and the compression depth of the explosive gradually increase with the thickness of the cover plate. When the cover plate reaches a certain thickness, there is no significant change on the final height of the bulge and the compression depth of the explosive. The decrease in explosive thickness increases the critical initiation threshold value, and the logarithm of the critical initiation threshold of the finite thickness explosive is approximately linearly related to the logarithm of the explosive thickness minus the compression depth. Therefore, this study can provide a reference for the initiation and simple calculation of the critical threshold of finite thickness explosives.

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“…By substituting and integrating Equations (15)(16)(17)(18)(19) into Equation ( 14), the dynamic term is obtained as…”

Section: Materials Flow In Cover Platementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Critical Initiation Threshold of Covered Finite Thickness Explosive under Impact of Shaped Charge Jet

Chen

Jia

Xia

et al. 2021

Propellants Explo Pyrotec

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“…Figures 4 and 5 show such curves for PBX-9404 and CompB. The maximum shock volume time t is calculated in these cases (round-nosed projectiles) with Peugeot's relation (14) . Two curves corresponding to the criteria E c constant and V 2 d constant are also plotted.…”

Section: Applicationsmentioning

confidence: 99%

Threshold Energy: A Dimensional Extension of the Critical Energy for Jet Attack Application

Peugeot¹,

Quidot

1998

Propellants, Explosives, Pyrotechnics

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The critical energy criterion (E c ) developed by Walker and Wasley is widely used to determine the response of explosive submitted tō yer plate impacts. As it has been shown previously to be limited in the pressure range over which it applies, in the number of explosive formulations which appear to obey it and in the range of projectiles covered by it, we have modi®ed twice this criterion. The ®rst mod-i®cation, taking into account a trend toward lower minimum energy with increasing pressure (pressure¯uence) enables it to be applied to explosives previously found to be outside the original criterion and to extend the pressure range. The second modi®cation taking into account a trend toward higher minimum energy with decreasing impact surface area (impact surface dependence) is a bidimensional extension of the critical energy concept. The threshold energy per unit area thus de®ned allows to predict the shock initiation limits of bare explosives (PBX and cast formulations) impacted by shaped charge jets.

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Shin

Lee

2003

Combustion, Explosion, and Shock Waves

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An Analytical Extension of the Critical Energy Criterion Used to Predict Bare Explosive Response to Jet Attack

Cited by 4 publications

References 5 publications

Critical Initiation Threshold of Covered Finite Thickness Explosive under Impact of Shaped Charge Jet

Critical Initiation Threshold of Covered Finite Thickness Explosive under Impact of Shaped Charge Jet

Threshold Energy: A Dimensional Extension of the Critical Energy for Jet Attack Application

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