Zheng Jianhua, Zhong Lin, Chen Hongxia, Huang Xiaomei, Cao Haijian
School of Textile and Clothing, Nantong University, Nantong 226007, China.
School of Textile Science and Engineering, Jiangnan University, Wuxi 214126, China.
Materials (Basel). 2022 Aug 2;15(15):5321. doi: 10.3390/ma15155321.
Three-dimensional (3D) woven composites have attracted much attention in the lightweight research of protective armor due to their high specific strength and good impact resistance. However, there are still many gaps in terms of the performance and influencing factors of three-dimensional deep-angle-interlock (3DDAI) Kevlar/EP armor materials. Therefore, in order to prepare 3DDAI Kevlar/EP armor materials with excellent ballistic resistance and mechanical properties, this paper studies the bending performance of 3DDAI Kevlar/EP armor materials and the influence of the number of stacking layers, resin content, laying method, and weft density. Finally, we compare it with the traditional two-dimensional (2D) plain laminated Kevlar/EP armor material. The results showed that when the 3DDAI Kevlar/EP armor material was subjected to bending load, the upper and bottom layers of the material had a great influence on the initial stiffness and fracture strength of the material, respectively; when the material's warp and weft density are quite different, the utilization rate of the yarn and the strength of the material are negatively affected; the fracture energy of the 3DDAI Kevlar/EP armor material prepared by the orthogonal laying method was about 20% higher than that of the 3DDAI Kevlar/EP armor material with the unidirectional layering method; and the bending performance of the 3DDAI Kevlar/EP armor material in the weft direction was better than that of the 2D plain laminated Kevlar/EP armor material, with the 3DDAI Kevlar/EP armor material having better delamination resistance. The research results will lay the foundation for structural optimization and engineering applications of such materials.
三维（3D）编织复合材料因其高比强度和良好的抗冲击性，在防护装甲轻量化研究中备受关注。然而，三维深角互锁（3DDAI）芳纶/环氧树脂装甲材料在性能和影响因素方面仍存在诸多空白。因此，为制备具有优异抗弹性能和力学性能的3DDAI芳纶/环氧树脂装甲材料，本文研究了3DDAI芳纶/环氧树脂装甲材料的弯曲性能以及堆叠层数、树脂含量、铺设方式和纬纱密度的影响。最后，将其与传统二维（2D）平纹层压芳纶/环氧树脂装甲材料进行比较。结果表明，当3DDAI芳纶/环氧树脂装甲材料承受弯曲载荷时，材料的上层和底层分别对材料的初始刚度和断裂强度有很大影响；当材料的经纬纱密度差异较大时，纱线利用率和材料强度会受到负面影响；正交铺设法制备的3DDAI芳纶/环氧树脂装甲材料的断裂能比单向分层法制备的3DDAI芳纶/环氧树脂装甲材料高约20%；3DDAI芳纶/环氧树脂装甲材料在纬向的弯曲性能优于2D平纹层压芳纶/环氧树脂装甲材料，且3DDAI芳纶/环氧树脂装甲材料具有更好的抗分层性能。研究结果将为此类材料的结构优化和工程应用奠定基础。
