Study on transition from dwell/interface defeat to penetration of long-rod projectile impacting silicon carbide

Tan, Mengting; Zhang, Xianfeng; Goh, Wooi-Boon; Luo, Boyang; Bao, Kuo

doi:10.1007/s10704-019-00379-5

Cited by 9 publications

(2 citation statements)

References 21 publications

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“…They founded that ceramic with a cover plate had better ballistic performance. Ning et al [11] confirmed that after, adding a cover plate, the starting position of the ceramic target damage changed from the front surface to the back surface [12]. Therefore, the cover plate could reduce the peak value of impact loading on the ceramic target and the damage caused by the direct impact of the projectile.…”

Section: Introductionmentioning

confidence: 97%

Effect of Cover Plate on the Ballistic Performance of Ceramic Armor

Sun

Cao

et al. 2020

Materials

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The interface defeat and dwell can effectively improve the ballistic performance of ceramic armors under high velocity impact of long rod projectiles. Confinement conditions along both axial and radial directions of ceramic armors can affect these behaviors. With the aim of giving an insight into the effect of cover plate thickness and connection mode of cover plates with confining tubes on these behaviors, numerical simulations were performed in which the confined silicon carbide (SiC) targets with cover plates were impacted by tungsten rods. The pressure on the surfaces of SiC targets with fixed cover plates are compared to that with free cover plates, showing that the plates fixed with the confining tubes can produce higher pressure by way of wedging. With the increase in cover plate thickness, the dwell duration of the tungsten rods on the ceramic interface gradually grows. In addition, the upper and lower limits of transition impact velocities for the SiC targets with cover plates in different connection modes (i.e., free or fixed) were obtained and analyzed. The results show that the increase rate of the transition velocity region for the cover plate with the fixed-mode is relatively stable and lower than with the free-mode. On this basis, the fixed cover plate contributes higher ballistic performances to the SiC target than the free cover plate. It is also noteworthy that the size of transition velocity region does not enlarge linearly with the increase in cover plate thickness due to the slow growth of the upper limit. Accordingly, thickness thresholds exist, which are 5 mm and 6 mm for the fixed and free cover plates, respectively. Considering the ballistic performance and economy, the cover plate with the thickness ranging from 3 mm to 5 mm, i.e., 1.5~2.5 times of the tungsten rod diameter, is ideal for the structural dimensions in this paper.

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Section: Introductionmentioning

confidence: 97%

Effect of Cover Plate on the Ballistic Performance of Ceramic Armor

Sun

Cao

et al. 2020

Materials

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“…Nevertheless, the material properties analyzed in static conditions may not be directly translatable to the dynamic demands of ballistic performance [ 8 , 9 , 10 ]. In addition to their material properties, the ballistic performance of these materials can be significantly improved by establishing a reasonable structure [ 11 , 12 , 13 , 14 , 15 ]. For example, the ballistic limit can be increased by adjusting the thickness ratio and the restraint form of the ceramic block.…”

Section: Introductionmentioning

confidence: 99%

Ballistic Performance of Polyurea-Reinforced Ceramic/Metal Armor Subjected to Projectile Impact

et al. 2022

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Although polyurea has attracted extensive attention in impact mitigation due to its protective characteristics during intensive loading, the ballistic performance of polyurea-reinforced ceramic/metal armor remains unclear. In the present study, polyurea-reinforced ceramic/metal armor with different structures was designed, including three types of coating positions of the polyurea. The ballistic tests were conducted with a ballistic gun; the samples were subjected to a tungsten projectile formed into a cylinder 8 mm in diameter and 30 mm in length, and the deformation process of the tested targets was recorded with a high-speed camera. The ballistic performance of the polyurea-reinforced ceramic/metal armor was evaluated according to mass efficiency. The damaged targets were investigated in order to determine the failure patterns and the mechanisms of interaction between the projectile and the target. A scanning electron microscope (SEM) was used to observe the microstructure of polyurea and to understand its failure mechanisms. The results showed that the mass efficiency of the polyurea-coated armor was 89% higher than that of ceramic/metal armor, which implies that polyurea-coated ceramic armor achieved higher ballistic performance with lighter mass quality than that of ceramic/metal armor. The improvement of ballistic performance was due to the energy absorbed by polyurea during glass transition. These results are promising regarding further applications of polyurea-reinforced ceramic/metal armor.

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