Análise do fluxo de resina durante a fabricação de compósitos GFRP via RTM contendo insertos impermeáveis embebidos

Autores

DOI:

https://doi.org/10.33448/rsd-v10i6.15362

Palavras-chave:

Materiais compósitos; RTM; Inserts embebidos.

Resumo

O objetivo deste trabalho é analisar o fluxo de resina durante a fabricação de compósitos GFRP (Glass Fiber Reinforced Polymer) via RTM (Resin Transfer Molding) contendo insertos impermeáveis embebidos. Os compósitos foram processados com inserts impermeáveis de polietileno de alta densidade embebidos via RTM. O sistema de processamento foi montado de forma que a análise digital da imagem do fluxo durante e após o processamento pudesse ser realizada. Amostras para ensaios de flexão em três pontos foram cortadas das placas e suas superfícies fraturadas foram analisadas por fratografia ótica. Os resultados indicam que a presença dos inserts bloquearam o fluxo transversal de resina dificultando o molhamento completo das fibras, o que levou a uma espessura da placa não uniforme. Regiões ricas em resina próximas as laterais dos inserts foram observadas. A análise do modo de falha dos compósitos através do ensaio de flexão em três pontos mostrou delaminação das fibras por tensão de cisalhamento tipo II, descolagem entre a interface fibra/matriz e o insert, e fratura do compósito com propagação da trinca através da região rica em resina.

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Publicado

22/05/2021

Como Citar

ARANHA, R.; CARVALHO, L. H. de; AMORIM JUNIOR, W. F. de. Análise do fluxo de resina durante a fabricação de compósitos GFRP via RTM contendo insertos impermeáveis embebidos. Research, Society and Development, [S. l.], v. 10, n. 6, p. e10410615362, 2021. DOI: 10.33448/rsd-v10i6.15362. Disponível em: https://rsdjournal.org/index.php/rsd/article/view/15362. Acesso em: 30 jun. 2024.

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Engenharias