ID017Experimental Study on the Failure Behaviors of Polyethylene Reinforced Cross-ply Laminates Impa

• 作 者: Guangyan Huang Wei Zhu Guangyan Liu Shunshan Feng
• 机 构: StateKeyLaboratoryofExplosionScienceandTechnology,BeijingInstituteofTechnology,Beijing100081,ChinaSc
• 出 处: 第五届爆炸、冲击波和高应变率现象国际研讨会(International Workshop on Explosion, S
• 发表日期: 2016年9期

　　Ultra-high molecular weight polyethylene(UHMWPE)fiber reinforced polymer matrix composites have been widely employed into anti-ballistic armor systems because of their high ratio of longitudinal strength to density [1].Failure mechanisms of the composites impacted by a sphere projectile have been studied,including indirect tension and membrane stretching [2].In this study,Dyneema? UHMWPE fiber reinforced cross-ply laminates(HB26)with four kinds of thickness ranging from 2 to 8 mm were impacted by a 12 mm diameter,90° conical-head projectile.The ballistic limits for these laminates decreased in order: 8 mm,2 mm,6 mm,and 4 mm.The unconventionally high ballistic limit for 2 mm laminates was attributed to much more serious plastic bulging because of membrane stretching,compared with the thicker laminates.However,the absorbed energy for the laminates impacted at projectile velocities higher than the ballistic limits basically increased with the panel thickness.Ply lateral displacement and perforations with round-star shape were observed.These failure characteristics were consistent with the low penetration resistance of the laminates impacted by the conical-head projectile compared with that impacted by other blunter-head projectiles.The laminates showed higher penetration resistance impacted obliquely compared with the normally impact results at similar initial velocities,which provided an alternative way to design high-performance composite armors with UHMWPE laminates.