Furação em compósito de fibras do caule da bananeira e poliuretano derivado do óleo de mamona

Detalhes bibliográficos
Ano de defesa: 2022
Autor(a) principal: Ellenberger, Alessandro
Orientador(a): Não Informado pela instituição
Banca de defesa: Não Informado pela instituição
Tipo de documento: Tese
Tipo de acesso: Acesso aberto
Idioma: por
Instituição de defesa: Universidade Tecnológica Federal do Paraná
Curitiba
Brasil
Programa de Pós-Graduação em Engenharia Mecânica e de Materiais
UTFPR
Programa de Pós-Graduação: Não Informado pela instituição
Departamento: Não Informado pela instituição
País: Não Informado pela instituição
Palavras-chave em Português:
Link de acesso: http://repositorio.utfpr.edu.br/jspui/handle/1/30204
Resumo: Natural fibers composites obtained from agricultural waste processes appear as an alternative to materials from non-renewable sources. The combination of banana fibers and polyurethane derived from castor oil originates a biodegradable composite, from renewable sources and with good physical-mechanical properties. Drilling of composites with natural fibers is challenging due to the non-homogeneous structure of the material and the behavior of the fibers and polymer matrix. This work investigated the drilling process in composites with banana stem fibers and polyurethane derived from castor oil developed from mechanized and manual processes, using different drill models and cutting parameters. The quality of the holes were evaluated, the forces involved in the machining were measured, the conditions of the drills after the process were observed, the types of chips generated and a post-processing was proposed. The results showed that the twist drill with a cutting speed of 19 m/min and a feed of 0.1 mm was the most suitable for drilling in the composite with mechanically process. For the composite with manually cut fibers, the three-point drill using a cutting speed of 38 m/min and a feed of 0.1 mm was the most suitable. The drill model with the movement of entry and exit in the material, the behavior of the banana fibers and feed rate showed to influence the generation of damages in the drilling of these composites.