Damage Mechanism of PTFE/Al Reactive Charge Liner Structural Parameters on a Steel Target

Xuepeng, Zhang; Wang, Zhijun; Yin, Jianping; Yi, Juneho; Wang, Haifu

doi:10.3390/ma14133701

Cited by 6 publications

(4 citation statements)

References 22 publications

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“…With the decrease of α, the proportion of reactive material in the composite jet head gradually increases. When α is 1/2, the composite jet head is almost entirely composed of outer reactive material, which will result in a lower penetration depth of target plate [19].…”

Section: Effect Of Height Ratio α Of Double-layered Liner On Reactive...mentioning

confidence: 99%

Numerical simulation of reactive composite jet penetrating concrete target

Liang He,

Yin,

Ya Yi

2023

J. Phys.: Conf. Ser.

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In order to allow more reactive material to enter the penetration hole when the initiation delay time of reactive material arrives, a double-layered liner structure with inner and outer liners of unequal height is designed. The outer liner is polytetrafluoroethylene/aluminum (PTFE/AL) reactive material, and the inner liner is metal material. The AUTODYN software were used to study the effects of height ratio α of the inner and outer liners and inner liner material on the reactive composite jet forming and penetrating C35 concrete target. The results show that when α varies, the composite liner forms a reactive composite jet composed of different materials at the head. When α is 4/5, the composite jet can both cause a large penetration depth on the target plate and allow more reactive material to enter the penetration hole. When the material of inner liner is titanium, almost all the reactive material follows the metal precursor penetrator into the penetration hole, which can significantly exert the combined damage effect of penetration and demolition.

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Section: Effect Of Height Ratio α Of Double-layered Liner On Reactive...mentioning

confidence: 99%

Numerical simulation of reactive composite jet penetrating concrete target

Liang He,

Yin,

Ya Yi

2023

J. Phys.: Conf. Ser.

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“…This reaming effect is mainly caused by the deflagration reaction of the PTFE/Al jet. This reveals that the PTFE/Al jet possesses a significant explosive damage effect [ 18 , 19 ]. When the PTFE/Zr long-rod penetrator strikes a thin target at hypervelocity, a reactive debris cloud forms behind it.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation Study on Impact Initiation on Shielded Charge Using Hypervelocity Composite-Structure Reactive Fragments

Lu,

Tan,

et al. 2024

Polymers

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In order to study the impact initiation process and mechanism of hypervelocity PTFE/Al composite structure reactive fragments on a shielded charge, first, an existing PTFE/Al reactive fragment hypervelocity collision experiment was numerically simulated using the SPH algorithm in ANSYS/AUTODYN 17.0 software. Then, the Lee–Tarver model was verified to describe the detonation reaction behavior and explosion damage effect of reactive materials. A numerical simulation analysis of the impact of two kinds of ultra-high-speed PTFE/Al composite-structure reactive fragments on a shielded charge was carried out using the SPH algorithm. These were steel-coated PTFE/Al and steel-semi-coated PTFE/Al fragments, and they were compared with the impact of steel fragments. The results indicate that the threshold velocities of the impact initiation of the two composite-structure reactive fragments on the shielded charge were both 2.6 km/s, while the threshold velocity of the steel fragment was 2.7 km/s. Under the threshold velocity condition, the two composite-structure reactive fragments increase the time and intensity of the compressed shock wave pulse in the explosive due to the impact energy release effect of the reactive materials, causing the shielded charge to detonate under the continuous long-term pulse loads. However, the mechanism of the steel fragment on the shielded charge belongs to the shock–detonation transition. The research results can provide scientific references for the design of hypervelocity reactive fragments and the study of their damage mechanism.

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“…Currently, little is known about how strikes, particularly those involving reactive fragment impacts, affect such equidistant steel plate constructions. Contrary to other inert materials, reactive fragments are structural materials that show properties that facilitate ignition during impact [13][14][15]. It will be interesting to observe what kind of perforation the three layers of uniformly spaced steel plate will undergo when reactive fragments impact them [16,17].…”

Section: Introductionmentioning

confidence: 99%

Perforation Characteristics of Three-Layer Steel Plates Subjected to Impact with Different Shapes and Velocities of Reactive Fragments

Sun,

Ma,

Cai

2023

Applied Sciences

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In this paper, the AUTODYN/Smoothed Particle Hydrodynamics (SPH) method was used to study the impact of reactive fragments on three-layer equidistant steel plates. The perforation characteristics of equidistant three-layer steel plates were investigated along with the parameters of combustion energy release from reactive fragments under varied impact velocities and shape conditions. The modification of the steel plates’ perforation diameter was investigated using the dimensional analysis approach. The shock wave pressure and chemical reaction characteristics were examined using the shock wave theory. The results show that within the examined impact velocity range, the perforation diameter initially increased and then decreased as the impact velocity of the reactive fragment rose. In addition, the perforation diameter was approximately 1.5–3 times the diameter of the reactive fragment. As the impact speed increased, the active reaction generated by the reactive fragments became more sufficient. The energy released contributed to the impact’s pressure rise; in addition, the temperature of the steel plate was raised in part by the reactive fragment impact, making the steel plate more prone to melting. The results of this investigation provide important support for a detailed understanding of the rules governing the failure of steel plates under the impact of reactive fragments as well as the combustion of reactive fragments under impact.

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Damage Mechanism of PTFE/Al Reactive Charge Liner Structural Parameters on a Steel Target

Cited by 6 publications

References 22 publications

Numerical simulation of reactive composite jet penetrating concrete target

Numerical simulation of reactive composite jet penetrating concrete target

Numerical Simulation Study on Impact Initiation on Shielded Charge Using Hypervelocity Composite-Structure Reactive Fragments

Perforation Characteristics of Three-Layer Steel Plates Subjected to Impact with Different Shapes and Velocities of Reactive Fragments

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