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Ballistic Performance of Guaruman Fiber Composites in Multilayered Armor System and as Single Target

Multilayered armor systems (MAS) with a front ceramic layer backed by a relatively unknown Amazonian guaruman fiber-reinforced (Ischnosiphon koem) epoxy composites, as second layer, were for the first time ballistic tested against the threat of 7.62 mm rifle ammunition. The amount of 30 vol% guaruma...

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Autores principales: Reis, Raphael Henrique Morais, Nunes, Larissa Fernandes, da Luz, Fernanda Santos, Candido, Verônica Scarpini, da Silva, Alisson Clay Rios, Monteiro, Sergio Neves
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8068205/
https://www.ncbi.nlm.nih.gov/pubmed/33917764
http://dx.doi.org/10.3390/polym13081203
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author Reis, Raphael Henrique Morais
Nunes, Larissa Fernandes
da Luz, Fernanda Santos
Candido, Verônica Scarpini
da Silva, Alisson Clay Rios
Monteiro, Sergio Neves
author_facet Reis, Raphael Henrique Morais
Nunes, Larissa Fernandes
da Luz, Fernanda Santos
Candido, Verônica Scarpini
da Silva, Alisson Clay Rios
Monteiro, Sergio Neves
author_sort Reis, Raphael Henrique Morais
collection PubMed
description Multilayered armor systems (MAS) with a front ceramic layer backed by a relatively unknown Amazonian guaruman fiber-reinforced (Ischnosiphon koem) epoxy composites, as second layer, were for the first time ballistic tested against the threat of 7.62 mm rifle ammunition. The amount of 30 vol% guaruman fibers was investigated in three distinct configurations: (i) continuous aligned, (ii) 0–90° cross-laid, and (iii) short-cut randomly dispersed. Additionally, single-target ballistic tests were also carried out in the best MAS-performed composite with cross-laid guaruman fibers against .22 caliber ammunition. The results disclosed that all composites as MAS second layer attended the US NIJ standard with corresponding penetration depth of (i) 32.9, (ii) 27.5, and (iii) 29.6 mm smaller than the lethal limit of 44 mm in a clay witness simulating a personal body. However, the continuous aligned guaruman fiber composite lost structural integrity by delamination after the 7.62 projectile impact. By contrast, the composite with cross-laid guaruman fibers kept its integrity for subsequent shootings as recommended by the standard. The single-target tests indicated a relatively higher limit velocity for .22 caliber projectile perforation, 255 m/s, and absorbed energy of 106 J for the cross-laid guaruman fibers, which are superior to corresponding results for other less known natural fiber epoxy composites.
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spelling pubmed-80682052021-04-25 Ballistic Performance of Guaruman Fiber Composites in Multilayered Armor System and as Single Target Reis, Raphael Henrique Morais Nunes, Larissa Fernandes da Luz, Fernanda Santos Candido, Verônica Scarpini da Silva, Alisson Clay Rios Monteiro, Sergio Neves Polymers (Basel) Article Multilayered armor systems (MAS) with a front ceramic layer backed by a relatively unknown Amazonian guaruman fiber-reinforced (Ischnosiphon koem) epoxy composites, as second layer, were for the first time ballistic tested against the threat of 7.62 mm rifle ammunition. The amount of 30 vol% guaruman fibers was investigated in three distinct configurations: (i) continuous aligned, (ii) 0–90° cross-laid, and (iii) short-cut randomly dispersed. Additionally, single-target ballistic tests were also carried out in the best MAS-performed composite with cross-laid guaruman fibers against .22 caliber ammunition. The results disclosed that all composites as MAS second layer attended the US NIJ standard with corresponding penetration depth of (i) 32.9, (ii) 27.5, and (iii) 29.6 mm smaller than the lethal limit of 44 mm in a clay witness simulating a personal body. However, the continuous aligned guaruman fiber composite lost structural integrity by delamination after the 7.62 projectile impact. By contrast, the composite with cross-laid guaruman fibers kept its integrity for subsequent shootings as recommended by the standard. The single-target tests indicated a relatively higher limit velocity for .22 caliber projectile perforation, 255 m/s, and absorbed energy of 106 J for the cross-laid guaruman fibers, which are superior to corresponding results for other less known natural fiber epoxy composites. MDPI 2021-04-08 /pmc/articles/PMC8068205/ /pubmed/33917764 http://dx.doi.org/10.3390/polym13081203 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Reis, Raphael Henrique Morais
Nunes, Larissa Fernandes
da Luz, Fernanda Santos
Candido, Verônica Scarpini
da Silva, Alisson Clay Rios
Monteiro, Sergio Neves
Ballistic Performance of Guaruman Fiber Composites in Multilayered Armor System and as Single Target
title Ballistic Performance of Guaruman Fiber Composites in Multilayered Armor System and as Single Target
title_full Ballistic Performance of Guaruman Fiber Composites in Multilayered Armor System and as Single Target
title_fullStr Ballistic Performance of Guaruman Fiber Composites in Multilayered Armor System and as Single Target
title_full_unstemmed Ballistic Performance of Guaruman Fiber Composites in Multilayered Armor System and as Single Target
title_short Ballistic Performance of Guaruman Fiber Composites in Multilayered Armor System and as Single Target
title_sort ballistic performance of guaruman fiber composites in multilayered armor system and as single target
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8068205/
https://www.ncbi.nlm.nih.gov/pubmed/33917764
http://dx.doi.org/10.3390/polym13081203
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