超高分子量聚乙烯织物/聚脲柔性复合材料的抗破片侵彻机制  

Projectile penetration mechanism of ultra-high molecular weight polyethylene fabric/polyurea flexible composites

作　　者：刘东炎 郑成燕 王晓旭[1] 钱坤[1] 张典堂[1] LIU Dongyan;ZHENG Chengyan;WANG Xiaoxu;QIAN Kun;ZHANG Diantang(Key Laboratory of Eco-Textiles(Jiangnan University),Ministry of Education,Wuxi,Jiangsu 214122,China)

机构地区：[1]生态纺织教育部重点实验室(江南大学),江苏无锡214122

出　　处：《纺织学报》2023年第3期79-87,共9页Journal of Textile Research

基　　金：国家自然科学基金项目(11702115,12072131)。

摘　　要：为研究平纹机织叠层和三维角联锁增强聚脲柔性复合材料的抗侵彻性能,以15 mm角联锁整体织物及叠层平纹织物(单层厚度0.39 mm,40层)为研究对象,通过表面喷涂聚脲制备2种不同织物结构的超高分子量聚乙烯(UHMWPE)织物/聚脲柔性复合材料;采用1.1 g柱状楔形破碎片,开展了弹道侵彻实验,并获取了弹道极限速度和比吸能;在此基础上,借助超景深显微镜及计算机断层扫描仪,观察侵彻后UHMWPE织物/聚脲柔性复合材料的表面及内部损伤形貌,分析抗破片侵彻机制。研究结果表明:UHMWPE织物/聚脲柔性复合材料抗破片侵彻性能具有明显的织物结构效应;相较于同厚度的叠层平纹织物增强聚脲柔性复合材料,角联锁织物增强聚脲柔性复合材料的弹道极限速度提升了4.9%;对于未被穿透的UHMWPE织物/聚脲柔性复合材料,其被侵彻过程主要包括聚脲对破片的包裹、剪切冲塞和纤维拉伸断裂破坏;叠层平纹织物的主要失效模式为剪切冲塞、分层失效,角联锁织物主要为纤维拉伸变形、拉伸断裂破坏。Objective Fragmented pieces resulted from explosion on doors,windows and walls are hidden dangers threatening people′s life and safety.At present,the explosion-proof equipment is used for high-efficiency,high-speed and large-area protection.Ultra-high molecular weight polyethylene(UHMWPE)fabric/polyurea flexible composites received much attention recently owing to their low density,high performance,flexibility,corrosion resistance,outstanding intrusion resistance and portability.Therefore,it is important to understand the damage mechanism of UHMWPE fabric/polyurea flexible composites under the high-speed impact of broken fragments for engineering applications.Method 15 mm angle-interlocked monolithic fabrics and laminated plain fabrics(single layer thickness of 0.39 mm,40 layers)were used in this research.Flexible composites were manufactured by surface spraying with polyurea,named 2D-C and 3D-C,respectively.A 1.1 g wedge-headed cylindrical projectile was adopted to impact on the two types of UHMWPE fabric/polyurea flexible composites to obtain the ballistic limiting velocity V 50,the specific energy absorption(SEA)and the backface deformation.Based on this,surface and internal damage morphology studies were carried out to reveal the intrusion damage mechanism.Results In case of equal thickness,3D-C panel demonstrates greater V 50 and SEA values and a wider overall area of deformation on the backface with greater depth of backface signature.This is related to the fact that the binding warp yarns in the angle-interlock fabrics can transmit stress waves in the thick direction.In addition,the damage to the polyurea surface is minor for both types of composites.At the same time,computed tomo-graphy(CT)scans were carried out in the warp,weft,and thick directions of the local areas of the non-penetrating bullet holes of the two types of composites to study the penetration process and damage patterns in the non-penetrating state.In the thickness direction,the annular stripes near the 3D-C bullet holes is relatively de

关 键 词：角联锁织物 柔性复合材料 破片侵彻 弹道极限速度 Micro-CT技术 超高分子量聚乙烯 

分 类 号：TB332[一般工业技术—材料科学与工程] TS101[轻工技术与工程—纺织工程]