Study on Anti-penetration Characteristics of Gunshot-impacted Polyurea Steel Plate Composite Layer
XIAO Yingjie1, SHI Shaoqing1,*, LIU Yingfeng2, CHEN Shou3, LIAO Yu1
1 Department of Military Facility, Army Logistics Academy of PLA, Chongqing 401331, China 2 Chongqing Foregin Construction(Group) Co., Ltd., Chongqing 401121, China 3 96911 Troops,Beijing 100011,China
Abstract: By carrying out small arms rifle test and numerical simulation of projectile penetration under different working conditions, the local damage of polyurea steel plate composite layer and ordinary steel plate under impact of two different shapes of projectile, pointed projectile and rounded projectile, at 800 m/s velocity was comparatively studied. By analyzing damage mechanism and penetration depth,the influence of polyurea coating material on the penetration resistance of steel plate specimen under high speed impact was investigated.The results show that for 0.4 mm thick ordinary steel plate and 3.4 mm thick polyurea steel composite layer, when the projectile body penetrates at a speed of 800 m/s, the penetration depth of the polyurea coated specimen with a thickness of 3 mm decreases by 16.4% compared with that of the ordinary steel plate specimen when resisting the penetration of pointed projectile, and 13.2% when resisting the penetration of round projectile. The damage area caused by round projectile is larger and the damage area caused by pointed projectile is smaller.Based on the ‘ductile crater enlargement' damage hypothesis model of the pointed projectile penetrating steel plate, five damage process hypotheses of projectile penetrating polyurea coated steel back plate were proposed, and the five damage process hypotheses were verified by bullet test.
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2022, Vol. 36 
