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Previous issue date: 2011-06-20 === This research work is based, in search of reinforcement s vegetable alternative to
polymer composites. The idealization of making a hybrid composite reinforced with vegetable
fibers licuri with synthetic fibers is a pioneer in this area. Thus was conceived a hybrid
composite laminate consisting of 05 (five) layers being 03 (three) webs of synthetic fibers of
glass and E-02 (two) unidirectional fabrics of vegetable fibers licuri. In the configuration of
the laminate layers have alternating distribution. The composite laminate was manufactured in
Tecniplas Commerce & Industry LTD, in the form of a card through the manufacturing
process of hand lay up. Licuri fibers used in making the foil were the City of Mare Island in
the state of Bahia. After cooking and the idealization of the hybrid composite laminate, the
objective of this research work has focused on evaluating the performance of the mechanical
properties (ultimate strength, stiffness and elongation at break) through uniaxial tensile tests
and three point bending. Comparative studies of the mechanical properties and as well as
among other types of laminated hybrid composites studied previously, were performed.
Promising results were found with respect to the mechanical properties of strength and
stiffness to the hybridization process idealized here. To complement the entire study were
analyzed in terms of macroscopic and microscopic characteristics of the fracture for all tests. === O presente trabalho de investiga??o baseia-se na busca de refor?os vegetais
alternativos aos comp?sitos polim?ricos. A idealiza??o de confeccionar um comp?sito h?brido
com refor?o de fibras vegetais de licuri com as fibras sint?ticas ? pioneira nessa ?rea. Para
tanto foi idealizado um laminado comp?sito hibrido constitu?do de 05 (cinco) camadas sendo
03 (tr?s) de mantas de fibras sint?ticas de vidro-E e 02 (duas) de tecidos unidirecionais de
fibras vegetais de licuri. Na configura??o do laminado as camadas possuem distribui??o
alternada. O laminado comp?sito foi fabricado, industrialmente, na forma de uma placa,
atrav?s do processo de fabrica??o de lamina??o manual (hand lay up). As fibras de licuri
utilizadas para a confec??o do laminado foram da cidade de Ilha de Mar? no estado da Bahia.
Ap?s a idealiza??o e confec??o do laminado comp?sito h?brido, o objetivo desse trabalho de
investiga??o se concentrou em avaliar o desempenho das propriedades mec?nicas (resist?ncia
?ltima, rigidez e deforma??o na ruptura), atrav?s dos ensaios de tra??o uniaxial e flex?o de
tr?s pontos. Estudos comparativos entre as propriedades mec?nicas obtidas, bem como entre
outros tipos de laminados comp?sitos h?bridos j? estudados, foram realizados. Resultados
promissores foram encontrados com rela??o ?s propriedades mec?nicas de resist?ncia e
rigidez para esse processo de hibridiza??o aqui idealizado. Para complementa??o de todo o
estudo foram realizadas an?lises macrosc?picas e microsc?picas das caracter?sticas da fratura
para todos os ensaios.
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