Avaliação de materiais utilizados em compósitos com estrutura sanduíche para aplicação em pranchas de surfe
Evaluation of materials used in sandwich composites for application on surfboards
Matheus Vinícius Gregory Zimmermann, Gabriel Augusto Tereza Silva
Resumo
A evolução das tecnologias aplicadas em pranchas de surfe apresentou um crescimento acelerado nos últimos anos. Não apenas o design das pranchas mudou, mas também os materiais utilizados na produção das pranchas apresentaram uma grande evolução. Neste trabalho foi realizado um estudo investigativo e comparativo entre diferentes tipos de materiais utilizados para produção de compósitos e de estruturas sanduíche utilizados em pranchas de surfe. Foram avaliadas 2 matrizes poliméricas termorrígidas (poliéster insaturado e epóxi), 4 tipos de fibras na forma de mantas bidirecionais (vidro, carbono, poliaramida e algodão) e 3 tipos de núcleos na forma de espumas (poliuretano, poliestireno expandido e cortiça). O processamento dos compósitos foi realizado em escala laboratorial, mas seguindo os mesmos procedimentos utilizados na produção de uma prancha, ou seja, laminação manual. Para produção da estrutura sanduíche, os compósitos (epóxi) foram laminados sobre a superfície da espuma, utilizando duas camadas de tecidos. Os principais resultados indicam uma melhor eficiência do núcleo de poliuretano. Já nos compósitos laminados, entre as formulações avaliadas, a amostra epóxi com carbono apresentou propriedades mecânicas superiores.
Palavras-chave
Abstract
The evolution of technologies applied to surfboards has shown an accelerated growth in recent years. Not only has the design of the boards changed, but the materials used in the surfboards production have also evolved greatly. In this sense, in this work an investigative and comparative study was carried out between different types of materials used for the production of composites with sandwich structures used in surfboards. It was evaluated two thermoset polymeric matrices (unsaturated polyester and epoxy), 4 types of fibers in the form of blankets (glass, carbon, polyaramid and cotton) and 3 types of cores in the form of foams (polyurethane, expanded polystyrene and cork). The composite processing was carried out on a laboratory scale, but following the same procedures used in the surfboard production, that is, manual lamination by hand lay up. For the production of the sandwich structure, the composites (epoxy) were laminated on the foam surface, using two layers of glass fabrics and different cores. The main results indicate a better efficiency of the polyurethane core. In laminated composites, among the evaluated formulations, epoxy with carbon sample showed superior mechanical properties.
Keywords
Referências
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Submetido em:
16/06/2021
Aceito em:
30/08/2021
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