Stab-resistant property of the fabrics woven with the aramid/cotton core-spun yarns |
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Authors: | Duong Tu Tien Jong S Kim and You Huh |
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Institution: | (1) International Center for Automotive Research CU-ICAR, Department of Mechanical Engineering, Clemson University, Clemson, SC 29634, USA;(2) Army Research Laboratory – Survivability Materials Branch, Aberdeen Proving Ground, Aberdeen, MD 21005-5069, USA |
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Abstract: | Aramid fibers are mainly used for industrial applications and human body protection against ballistic threats. But they are
used mostly in forms of composites. And fabrics woven with a high yarn count offer a moderate protection performance against
the knife stabbing due to the low shear strength. This research is focused on investigating the effect of the aramid core-spun
yarns on the stab resistance of the woven fabrics. With the aramid core-spun yarns with core to sheath weight ratio of 1 to
2.5 the armor specimens having different fabric densities were prepared and the knife edge impact test was conducted. On the
impact energy of the knife at the level 1 according to the NIJ standard, the drop tower test results demonstrated that fabric
density of the armor specimens affected the stab resistance significantly. The penetration depth of the impactor through the
armor specimens was associated with the thickness and mass of the armor sample in different ways. Being the stab resistance
introduced by considering the penetration depth of the impactor via thickness and weight per surface area, the effects of
the fabric conditions on the anti-stabbing property could be systematically analyzed and turned out that there was an optimal
level of the fabric density, showing the most effective stab resistance. |
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