An experimental study was conducted to investigate the potential application of polyurea in a ceramic armour against long rod projectiles. The Dragonshield-BC polyurea was used in this study. The baseline armour module configurauon consisted of a 5 mm thick steel cover plate, 20 mm thick SiC tile and 10 mm thick steel backing plate. The layer of polyurea was added either between the cover plate and ceramic or behind the backing plate. The armour modules were subjected to normal impact by tungsten alloy long rod projectiles at a nominal impact velocity of 1.25 km/s. A witness block made of AISI 4340 steel was placed behind the armour module to capture the residual projectile. Armour module performance was assessed using mass efficiency. This study revealed that polyurea enhanced cover plate could improve ceramic armour performance depending on configurauon. The four configurations were: (1) 2 mm thick polyurea bonded to cover plate, (2) 4 mm thick polyurea bonded to cover plate, (3) 2 mm polyurea interlayer without bonding with cover plate and, (4) 2 mm polyurea bonded to 2 mm thick cover plate. Of the four configurations tested, only one showed at least 45% improvement in mass efficiency while the rest had little or no effect._
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机译：进行了实验研究，以研究陶瓷盔甲对长杆射弹的潜在应用。在本研究中使用了Dragonshield-Bc Polyurea。基线装甲模块配置由5毫米厚的钢板，20毫米厚的SiC瓷砖和10毫米厚钢板板组成。将聚脲层加入盖板和陶瓷或背板后面。通过钨合金长杆射弹，在标称冲击速度为1.25 km / s的标称冲击速度对铠装模块进行正常冲击。由AISI 4340钢制成的证人块放在铠装模块后面，以捕获残留的射弹。使用质量效率评估装甲模块性能。本研究表明，根据配置，聚脲增强盖板可以改善陶瓷装甲性能。四种配置是：（1）2mm厚的聚脲键合到盖板，（2）4mm厚的聚脲粘合到盖板，（3）2mM聚脲夹层，无需粘合，（4）2mM聚脲键合到2毫米厚的盖板。在测试的四种配置中，只有一个在其余的质量效率上提高至少45％，而其余几乎没有任何影响。
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