Multi-stage penetration characteristics of thick ultra-high molecular weight polyethylene laminates  

作　　者：Ming-jin Cao Li Chen Rong-zheng Xu Si-jia Liu Qin Fang 

机构地区：[1]Engineering Research Center of Safety and Protection of Explosion&Impact of Ministry of Education,Southeast University,Nanjing,211189,China [2]Institute of Architectural Engineering,Huanghuai University,Zhumadian,463000,China [3]State Key Laboratory of Disaster Prevention&Mitigation of Explosion&Impact,Army Engineering University of PLA,Nanjing,210007,China

出　　处：《Defence Technology（防务技术）》2023年第9期101-110,共10页Defence Technology

基　　金：the financial support from National Natural Science Foundation of China(Grant No.51978166);National Key Research and Development Program of China(Grant No.2019YFC0706105,2021YFC3100703);the Fundamental Research Funds for the Central Universities(Grant No.2242022R10124s)。

摘　　要：To further reveal the failure mechanisms of thick ultra-high molecular weight polyethylene(UHMWPE)laminates,field firing tests were conducted for 10-,20-,and 30-mm thick laminates against 12.7-mm calibre wedge-shaped fragment simulated projectiles at high velocities between 450 and 1200 m/s.The ballistic performance,deformation process,and staged failure characteristics of the laminates with different thicknesses were compared and analysed.The results demonstrate that the ballistic limits of the UHMWPE laminates increase almost linearly with laminate thickness.The 10-mm thick laminate generally experiences two-stage failure characteristics,whereas three-staged failure occurs in the 20-and 30-mm thick laminates and the progressive delamination is evident.The energy limit concept representing the maximum energy absorption efficiency and the idea of reuse of the thick UHMWPE laminates are proposed in this study.The findings of this research will be useful in the design of flexible and effective UHMWPE-based protective equipment.

关 键 词：UHMWPE laminates Ballistic limit Thickness Mechanism Energy limit 

分 类 号：O341[理学—固体力学] TJ04[理学—力学]