Akademik Veri Yönetim Sistemi
THIN-WALLED STRUCTURES, cilt.180, 2022 (SCI-Expanded)
Shear thickening fluid (STF) treated textiles have been widely used in anti-impact structures in recent years. STF treatment provides an enhanced energy absorbing capacity for textiles due to increased yarn interactions within the structures. Adjacent yarns around the impact point contribute to energy distribution to far-fields. STF treated textiles show great efficiency in terms of protection even being hit at single point. From this viewpoint, these structures are expected to exhibit higher efficiencies under multi-point impacts because of their energy dissipation capabilities by the contribution of far-fields. On this basis, STF treated aramid fabrics were adapted to a secondary protective structure, namely spall liner for the first time in this study. Spall liner restrains emission of spalling pieces inside an armored vehicle and being subjected to multi-point impacts when armor is perforated by an impacting threat. In this work, STF rheology was investigated in rheological measurements. Yarn pull-out tests were carried out to investigate the effect of STF treatment on yarn interactions. To increase the yarn coupling in textiles, various amounts of silicon carbide (SiC) particles were also included in the STF treatments. A metal plate, which was impacted by a projectile in ballistic testing, was used in front of the spall liners to produce spalling pieces. The performance of the spall liners was evaluated by measuring the angle of spall emissions at the back face of the spall liners. According to the results, STF treatments enhanced yarn interactions within the spall liners. Carbide additives led to a further increase in this mechanism. For this reason, angle of spall emission was reduced from 16.9? to 10.5? by treating neat textiles with STF. This metric was restricted to 8.8? in the carbide included spall liners. By designing a 90 mm gap between the spall liner and metal plate, emission angle was lowered to 5.7?.