1. High-Velocity Impact Behavior of Aramid/S2-Glass Interply Hybrid Laminates.
- Author
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da Silva, Amanda Albertin Xavier, Scazzosi, Riccardo, Manes, Andrea, and Amico, Sandro Campos
- Abstract
This work investigates the effect of hybridization and stacking sequence on the ballistic impact response of S2-glass/aramid/epoxy laminates. Different laminates were manufactured by vacuum infusion, one with only aramid fabrics (12 layers, K
12 ), two with only S2-glass fabrics (12 or 18 layers, Gl12 and Gl18 ) and five interply hybrids (Gl3 K9 , [GlK]6 , K6 Gl6 , Gl6 K6 , Gl9 K3 ). Ballistic tests were performed according to EN1522- FB3, with the.357 Magnum FMJ projectile. The ballistic curves were determined to obtain the ballistic limit velocity (VBL ), and in-plane damage area and through-the-thickness damage were analyzed. For the impact at 430 m/s, all laminates were perforated, and the Gl18 exhibited greater specific absorbed energy (26.6 J.m2 /kg), with lower thickness and in-plane damage than the K12 (22.6 J.m2 /kg) with a similar areal density (≈0.77 g/cm2 ). No significant differences in ballistic limits (pairing effect) were observed for the [GlK]6 , Gl6 K6 and K6 Gl6 hybrids, and the Gl3 K9 hybrid exhibited a positive hybrid effect. The areal density of laminates has shown a great influence on the final ballistic response. The results have shown that hybridization of aramid composites with S2-glass may enhance the impact absorption capability of hard composite armors, however, the ballistic limit velocity, which is a crucial parameter to assess ballistic shield performance, reduced. [ABSTRACT FROM AUTHOR]- Published
- 2021
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