Made available in DSpace on 2014-12-17T14:58:08Z (GMT). No. of bitstreams: 1 NelsonRD_DISSERT.pdf: 6410040 bytes, checksum: b984ed383486a723e2f3e4c87e50d6c7 (MD5) 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.