Leiva Palomera Daniel Francisco, Fernández Abreu María Elena, Valín Rivera José Luis, Valin Fernández Meylí, Ferreira de Amorim Júnior Wanderley, Valenzuela Diaz Francisco Rolando, Alcaino Molina Diego Alejandro, Mendez Jofre Pablo Esteban, Ketterer Cristobal Ignacio Galleguillos
Escuela de Ingeniería Mecánica, Pontificia Universidad Católica de Valparaíso, Valparaíso 2340025, Chile.
Department of Mechanical Engineering (DIM), Faculty of Engineering (FI), University of Concepción, Concepción 4030000, Chile.
Polymers (Basel). 2025 Jan 29;17(3):372. doi: 10.3390/polym17030372.
In this study, the ballistic effectiveness of Kevlar 29 composites was analyzed by combining 400 and 460 GSM grammages with a polyurethane matrix. Plates measuring 300 mm × 250 mm were fabricated using hand lamination and compression techniques, with reinforcement designs consisting of 10, 14, and 18 layers of Kevlar 29 fabric oriented at a 90° angle. Ballistic tests were conducted following the parameters of the NIJ 0108.01 standard, applying five impacts with 9 mm FMJ and 22 (5.5 mm) caliber bullets. Both the composites and pure Kevlar were evaluated. Post-damage visual analysis was conducted on the front and back faces, as well as the interior of the composite, to identify delamination and fractures. The results show that .22 caliber bullets were captured at various stacking levels depending on the configuration, whereas 9 mm bullets penetrated all the plates. Localized fractures and delamination associated with the impacts were observed, highlighting the importance of stacking design and grammage in the material's energy dissipation capacity.
在本研究中，通过将400克/平方米和460克/平方米的克重与聚氨酯基体相结合，分析了凯夫拉尔29复合材料的防弹效能。使用手工层压和压缩技术制作了尺寸为300毫米×250毫米的板材，其增强设计由10层、14层和18层呈90°角排列的凯夫拉尔29织物组成。按照美国国家司法研究所（NIJ）0108.01标准的参数进行弹道测试，使用9毫米全金属被甲弹（FMJ）和.22（5.5毫米）口径子弹施加五次撞击。对复合材料和纯凯夫拉尔材料均进行了评估。对复合材料的正面、背面以及内部进行了损伤后视觉分析，以识别分层和裂缝。结果表明，根据结构配置，.22口径子弹在不同的堆叠层数下被拦截，而9毫米子弹穿透了所有板材。观察到与撞击相关的局部裂缝和分层，突出了堆叠设计和克重在材料能量耗散能力中的重要性。
