Abstract
The ballistic performance of plain woven jute fabric-reinforced polyester matrix composites was investigated as the second layer in a multilayered armor system (MAS). Volume fractions of jute fabric, up to 30 vol %, were mixed with orthophthalic polyester to fabricate laminate composites. Ballistic tests were conducted using high velocity 7.62 mm ammunition. The depth of penetration caused by the bullet in a block of clay witness, simulating a human body, was used to evaluate the MAS ballistic performance according to the international standard. The fractured materials after tests were analyzed by scanning electron microscopy (SEM). The results indicated that jute fabric composites present a performance similar to that of the much stronger Kevlar™, which is an aramid fabric laminate, as MAS second layer with the same thickness. The mechanism of this similar ballistic behavior as well as the comparative advantages of the jute fabric composites over the Kevlar™ are discussed.
Highlights
Ballistic protection of personnel, equipment and vehicles is nowadays of upmost importance due to armed urban conflicts and regional wars involving ever increasing fire power
For protection against VIP ammunition, the multilayered armor system (MAS) with a hard and brittle front material, like a ceramic, is an effective solution [2,3,4,5]. Aramid fabric laminates such as KevlarTM and TwaronTM, Teijin, Arnhem, The Netherlands [2,3,4,5,6], as well as ultra-high molecular weight polyethylene (UHMWPE), such as DyneemaTM and SpectraTM, Honeywell, Colonial Heights, VA, USA [7,8], are commercial materials used as MAS second layer
In all ballistic tests using jute fabric composites as MAS second layer, the impact energy failed to perforate the aluminum alloy third layer
Summary
Equipment and vehicles is nowadays of upmost importance due to armed urban conflicts and regional wars involving ever increasing fire power. Aramid fabric laminates such as KevlarTM and TwaronTM, Teijin, Arnhem, The Netherlands [2,3,4,5,6], as well as ultra-high molecular weight polyethylene (UHMWPE), such as DyneemaTM and SpectraTM, Honeywell, Colonial Heights, VA, USA [7,8], are commercial materials used as MAS second layer Another MAS third layer, normally a ductile metallic sheet, may be added to reduce even further the energy carried by the bullet impact shock wave [9]. Both the composite integrity and shock wave impedances using as second layer either KevlarTM or polyester composites reinforced with 10, 20 and 30 vol %are of woven jute fabric was studied Both the composite integrity and shock wave impedances are plainevaluated
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