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Previous issue date: 2017-07-31 / A utiliza??o da energia e?lica em larga escala j? evidenciou seus benef?cios com
grandes projetos ao redor do mundo. Devido ao baixo n?vel tecnol?gico dos processos
produtivos dos componentes de uma torre de produ??o deste tipo de energia, ocorre
a gera??o de enormes quantidades de res?duos que podem causar impacto negativo
ao meio ambiente. Um dos principais componentes para a concep??o dos geradores
e?licos s?o as p?s, que s?o produzidas atrav?s da lamina??o de grandes moldes que
cont?m, entre outros componentes, a fibra de vidro na forma de n?otecidos, da qual
10 a 15% de retalhos ? eliminado no momento do corte durante sua fabrica??o. Uma
forma de se contornar o problema do descarte dos res?duos provenientes da produ??o
das p?s e?licas ? a reutiliza??o destes no desenvolvimento de comp?sitos. Os
materiais comp?sitos, impulsionados pela ind?stria aeroespacial e militar,
desenvolveram-se de forma bastante significativa nos ?ltimos anos, proliferando em
diversas ?reas, devido as suas propriedades ?nicas, tais como: a elevada resist?ncia
mec?nica, baixa densidade, excelente resist?ncia t?rmica e ? corros?o dentre outras.
A fibra de Juta por apresentar um baixo custo, ser facilmente encontrada na regi?o e
apresentar bons resultados de resist?ncia, foi utilizada em densidades diferentes para
verificar sua influ?ncia, nas propriedades mec?nicas do comp?sito hibrido. O presente
trabalho teve como objetivo desenvolver materiais comp?sitos h?bridos (fibra natural
+ fibra de vidro) resinados com poli?ster avaliando o comportamento dos comp?sitos
refor?ados com res?duos (retalhos) de manta de fibra de vidro oriundos da ind?stria
e?lica. Foram realizadas an?lises do percentual de refor?o, resist?ncia ? tra??o e
flex?o, absor??o de ?gua e resist?ncia ? intemp?ries para verificar o desempenho dos
comp?sitos desenvolvidos. Os resultados obtidos com os materiais comp?sitos
refor?ados com tr?s camadas de vidro, quando submetidos a ensaios de tra??o,
apresentaram valores 10 vezes superiores ao material sem refor?o. Nos ensaios de
flex?o, quando comparados os mesmos as for?as utilizadas foram entre 117 N, para materiais sem refor?o, e 691 N para comp?sitos refor?ados com tr?s camadas de vidro, abrindo novas oportunidades para o desenvolvimento de materiais produzidos com substratos que s?o normalmente descartados para o meio ambiente. / The use of wind energy on a large scale has already shown its benefits with major
projects around the world. Due to the low technological level of the productive
processes of the wind towers components, the generation of enormous amounts of
waste occurs, which can cause negative impact to the environment. One of the main
components for the design of wind generators are the blades. They are produced by
laminating of large molds that contain, among other components, glass fiber in the form
of nonwoven, of which 10% to 15% of flaps are eliminated at the time of cutting during
manufacture. One way of avoiding the problem of discarding waste from the production
of wind turbines is to reuse them in the development of composites. Composite
materials, driven by the aerospace and military industries, have developed quite
significantly in recent years, proliferating in several areas due to their unique
properties, such as; High mechanical strength, low density, excellent thermal and
corrosion resistance among others. The Jute fiber presented a low cost, easily found
in the region and presented good resistance results, was used in different densities to
verify its influence on the mechanical properties of the hybrid composite. The present
work aims to develop hybrid composite materials (natural fiber + glass fiber) with
polyester resins , evaluating the influence of the use of fiberglass residues from the
wind industry. Density, count yarns, twist tests were used to characterize the
reinforcement materials, as well as fiber content, tensile strength, flexural strength,
water absorption and weathering analyzes for the performance of the composites
developed. The results obtained with the reinforced composites with three layers of
glass, when subjected to tensile tests, presented values 10 times higher than the
material without reinforcement. In the flexural tests, when compared, the forces used
were between 117 N for non-reinforced materials and 691 N for reinforced composites
with three layers of glass, opening new opportunities for the development of materials
produced with substrates that are normally discarded for the environment.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/24839 |
| Date | 31 July 2017 |
| Creators | Lucena, Joseclebio da Fonseca |
| Contributors | 18222161415, Oliveira, Fernando Ribeiro, 03986506675, Ramos, Rogerson Rodrigues Freire, 05206311456, Andrade, S?nia Maria Bel?sio de, 93807830430, Ladchumananandasivam, Rasiah |
| Publisher | PROGRAMA DE P?S-GRADUA??O EM ENGENHARIA MEC?NICA, UFRN, Brasil |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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