A reactive material double-bumper shield for centimeter sized projectile

Ren, Siyuan; Zhang, Qingming; Wu, Qiang; Long, Renrong; Gong, Lei; Lu, Yangyu

doi:10.1016/j.ijimpeng.2021.104028

Cited by 15 publications

(7 citation statements)

References 24 publications

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“…The mass ratio of PTFE to aluminum in PTFE/Al was 73.5/26.5, and the average particle sizes were 3 μm and 30 μm, respectively. The content and particle size of the components of PTFE/Al used in this study were the same as those in the literature [ 22 , 23 ], so the EOS and strength model parameters of the PTFE/Al material could be selected from the literature; they are shown in Table 1 and Table 2 , respectively [ 22 ].…”

Section: Numerical Simulation Model and Reliability Verificationmentioning

confidence: 99%

“…Currently, numerous research studies have focused on PTFE/Al jet penetration and the penetration of a PTFE/Al fragment and its composite-structure fragment within 1.6 km/s. In the field of hypervelocity collision, there are only a few studies on the use of the PTFE/Al material as a spacecraft bumper [ 22 , 23 , 24 , 25 ], but there is almost no research on fragments. The collision between PTFE/Al prefabricated fragments and a high-speed flying target, with a relative velocity that is more than 2 km/s, is classified as an ultra-high-speed collision [ 26 ].…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Numerical Simulation Model and Reliability Verificationmentioning

confidence: 99%

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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“…According to the references [ 36 , 37 ], it is considered that the PTFE/Al reactive materials can have a violent detonation-like reaction instantly at t ≥ τ , and the behavior can be described through the EOS of the JWL. The corresponding parameters of the reactive material detonation-like effects are listed in Table 7 .…”

Section: Perforation Mechanism Of Reactive Materials Composite Jetmentioning

confidence: 99%

Study on Perforation Behavior of PTFE/Al Reactive Material Composite Jet Impacting Steel Target

Duan

Zheng

2023

Materials

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To study the penetration and cratering effect of reactive material composite jets, a series of experiments are carried out for the shaped charge (SC) with different composite liners damaging steel targets. The inner layer of composite liners is metal and the outer one is a polytetrafluoroethylene/aluminum (PTFE/Al) reactive material. Copper (Cu), titanium (Ti) and Al inner liners are used in this paper. The reactive material liner is composed of 73.5 wt.% PTFE and 26.5 wt.% Al powder through mass-matched ratios. Reactive material composite liners are prepared through machining, cold pressing and a sintering process. The SC mainly consists of a case, a composite liner, high-energy explosive and an initiator. The steel target is steel 45#, with a thickness of 66 mm. A standoff of 1.0 CD (charge diameter) is selected to conduct the penetration experiments. The experimental results show that when the inner layer of the composite liner is composed of Ti and Al, the hole diameters on the steel target formed by the reactive material composite jet are significantly larger than that of the inner Cu liner. By introducing the initiation delay time (τ) and detonation-like reaction model of PTFE/Al reactive materials, an integrated numerical simulation algorithm of the penetration and detonation-like effects of reactive material composite jets is realized. Numerical simulations demonstrate that the initial penetration holes on the steel targets are enlarged under the detonation-like effects of PTFE/Al reactive materials, and the simulated perforation sizes are in good agreement with the experimental results.

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“…, and Ymax is the maximum yield stress. The parameters used for the reactive material are listed in table 2 and table 3 [12,13], which corresponds to a typical PTFE/Al reactive material (73.5% PTFE, 26.5% Al, by mass). The parameters used for the rest materials are listed in table 4 and table 5, which are obtained from the material library in Autodyn.…”

Section: Simulation Modelmentioning

confidence: 99%

Simulation study on damage behaviour of partially filled fuel tank subjected to reactive core projectile impact

Xie

Shi

Liu

2023

J. Phys.: Conf. Ser.

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Based on the structure of traditional small caliber APDS (Armor Piercing Discarding Sabot), a novel reactive core projectile (RCP) is proposed to improve the damage capability against fuel tank. The penetration processes of RCPs impacting partially filled fuel tanks with different penetration angles are investigated by numerical simulation, in which the Powder Burn model is adopted to describe the unique impact-induced delayed deflagration behaviour of reactive material. The simulation results show that, compared with the inert projectile, the RCP not only releases additional chemical energy during penetration process, but also increases the proportion of kinetic energy transferred to the surrounding fuel, resulting in the enhanced damage to fuel tank. Moreover, the damage effect of RCP is significantly influenced by the penetration angle, and a relatively small penetration angle is beneficial to improve the damage effect. The simulation results verify the time sequenced combined damage mechanism of kinetic energy and chemical energy of RCP, which provides a beneficial reference for the design of small caliber APDS.

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A reactive material double-bumper shield for centimeter sized projectile

Cited by 15 publications

References 24 publications

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

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

Study on Perforation Behavior of PTFE/Al Reactive Material Composite Jet Impacting Steel Target

Simulation study on damage behaviour of partially filled fuel tank subjected to reactive core projectile impact

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