Journal of Materials Research and Technology Journal of Materials Research and Technology
J Mater Res Technol 2017;6:323-8 DOI: 10.1016/j.jmrt.2017.08.003
Original Article
Performance of natural curaua fiber-reinforced polyester composites under 7.62mm bullet impact as a stand-alone ballistic armor
Fábio de Oliveira Bragaa,b,, , Lucas Tedesco Bolzana, Édio Pereira Lima Jr.a, Sergio Neves Monteiroa
a Military Institute of Engineering (IME), Department of Materials Science, Rio de Janeiro, RJ, Brazil
b National Industrial Training Service of the State of Rio de Janeiro (SENAI-RJ), SENAI Rio Faculty, Rio de Janeiro, RJ, Brazil
Received 29 May 2017, Accepted 15 August 2017

A multilayered armor system (MAS) is intended to personal protection against high kinetic energy ammunition. MAS layers are composed of materials such as a front ceramic and a back composite that must show both high impact resistance and low weight, usually conflicting characteristics. Synthetic fiber fabrics, such as Kevlar™ and Dyneema™, are the favorite materials to back the front ceramic, due to their high strength, high modulus and relatively low weight. Recently, composites reinforced with natural fibers have been considered as MAS second layer owing to their good performance associated with other advantages as being cheaper and environmentally friendly. Among the natural fibers, those extracted from the leaves of the Ananas erectifolius plant, known as curaua, stand out due to its exceptional high strength and high modulus. Thus, the objective of the present work is to evaluate the performance of curaua fiber-reinforced polyester composites subjected to ballistic impact of high energy 7.62mm ammunition. Composites reinforced with 0, 10, 20 and 30vol.% of curaua fibers were produced and stand-alone tested as armor target to evaluate the absorbed energy. Analysis of variance (Anova) and Tukey's honest significant difference test (HSD) made it possible to compare the results to Kevlar™ laminates. Among the tested materials, the 30vol.% fiber composites were found to be the best alternative to Kevlar™.

Composite, Natural fiber, Curaua fiber, Ballistic test
J Mater Res Technol 2017;6:323-8 DOI: 10.1016/j.jmrt.2017.08.003