不同陶瓷厚度复合靶的抗侵彻行为研究OA北大核心CSTPCD

Light composite armor is one of the key points modern armor protection system.In order to study the anti-penetration performance of ceramic/fiber composite targets with different ceramic thicknesses,ballistic test of 12.7 mm armor-piercing incendiary projectile penetrating aramid/SiC ceramic/ultra high molecular weight polyethylene fiber composite targets under the same working condition was carried out.The core and target plate were recovered after the test.Then,the crushing characteristics and failure modes of the core and ceramics were observed and analyzed.At the same time,the recovered projectile core and target fragments were screened and weighed,and the cumulative mass distribution of projectile core and ceramic fragments was analyzed.Thus,the anti-penetration performance of ceramic/fiber composite target was characterized.The results show that the head of the core is crushed into powder and the body is crushed into irregular fragments.While the remaining core is not broken and the fracture surface shows the characteristic of regular fracture.It is found that there are regular cleavage fracture characteristics in the remaining core by scanning electron microscope,which indicates that the main failure modes are brittle fracture and local plastic deformation under tensile stress caused by multiple fracture failures.The ceramic crushing form includes annular crack,radial crack and ceramic cone with cone angle generated by the two kinds of cracks interweave.The ceramic cone angle increases by about 11.67％for every increase of 1 mm in ceramic thickness.The ceramic crushing area is divided into crushing zone and crack zone.The crushing zone is the circular area on the target.The crushing area increases by about 11.13％for every increase of 1 mm in ceramic thickness.Based on the statistical analysis of projectile core and ceramic fragments,it is found that the cumulative mass distribution law of projectile core and ceramic fragments accords with the Rosin-Rammler power law distribution function model.With the increase of ceramic thickness,the average characteristic size λ decreases,and the fragmentation degree of projectile core and ceramic increases.