<p>Recent years have witnessed an increasing demand for hybrid composites due to their unique and enhanced properties in various structural applications, particularly in the field of ballistic impact, which finds its application in body armour, aerospace and automotive industries. This study concentrates on the response of hybrid composite armour, made up of woven fiber fabricated with ultra-high molecular weight polyethylene (UHMWPE) and Aluminium (Al6063), and subjected to a sub-ordinance range of ballistic impact. The fabrication of the Kevlar-29/UHMWPE/Al6063 hybrid composite laminates was done by the hand layup method, followed by a vacuum-assisted technique. In the experimental part, two staking sequences of hybrid laminate were taken into consideration, with five samples of each sequence impacted at five different velocities. In the first case, Kevlar-29 (K-29) was considered as a front plate and in the second case, K-29 was considered as a back plate. Both sequences were impacted by a hemispherical nose-type projectile, using a pneumatic gun setup, having a maximum pressure of 30 bars. The average energy absorbed is 29.51% in the first case and 28.38% for the second case, depicting good strength and a lightweight of 152&#xa0;g along with 51,070.52&#xa0;mm<sup>2</sup> surface area of the plate. The results reveal that the energy absorption in the first case is 1.13% more than in the second case. It was further observed that the kind of damage involved is delamination, fiber breakage, matrix cracking and fiber splitting. The results of this study contribute to enhancing the protection, designing a lightweight structure, and developing a new material for industrial purposes in the manufacturing of body armour.</p>

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Experimental investigation of Kevlar/UHMWPE based hybrid composite body armour subjected to sub-ordinance ballistic limit

  • Jitendra Rajput,
  • Rajesh Kumar Bhushan,
  • Azhar Jamil

摘要

Recent years have witnessed an increasing demand for hybrid composites due to their unique and enhanced properties in various structural applications, particularly in the field of ballistic impact, which finds its application in body armour, aerospace and automotive industries. This study concentrates on the response of hybrid composite armour, made up of woven fiber fabricated with ultra-high molecular weight polyethylene (UHMWPE) and Aluminium (Al6063), and subjected to a sub-ordinance range of ballistic impact. The fabrication of the Kevlar-29/UHMWPE/Al6063 hybrid composite laminates was done by the hand layup method, followed by a vacuum-assisted technique. In the experimental part, two staking sequences of hybrid laminate were taken into consideration, with five samples of each sequence impacted at five different velocities. In the first case, Kevlar-29 (K-29) was considered as a front plate and in the second case, K-29 was considered as a back plate. Both sequences were impacted by a hemispherical nose-type projectile, using a pneumatic gun setup, having a maximum pressure of 30 bars. The average energy absorbed is 29.51% in the first case and 28.38% for the second case, depicting good strength and a lightweight of 152 g along with 51,070.52 mm2 surface area of the plate. The results reveal that the energy absorption in the first case is 1.13% more than in the second case. It was further observed that the kind of damage involved is delamination, fiber breakage, matrix cracking and fiber splitting. The results of this study contribute to enhancing the protection, designing a lightweight structure, and developing a new material for industrial purposes in the manufacturing of body armour.