Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.22/4119
Título: Drilling delamination outcomes on glass and sisal reinforced plastics
Autor: Durão, Luís M.
Gonçalves, Daniel J. S.
Tavares, João Manuel R. S.
Albuquerque, Victor Hugo C. de
Panzera, Túlio Hallak
Silva, Leandro J.
Vieira, A. Aguiar
Baptista, A. P. M.
Palavras-chave: Glass fibre
Sisal Fibre
Drilling
Delamination
Image analysis
Data: 2013
Editora: Trans Tech Publications
Relatório da Série N.º: Materials Science Forum; Vol. 730-732
Resumo: Nowadays, fibre reinforced plastics are used in a wide variety of applications. Apart from the most known reinforcement fibres, like glass or carbon, natural fibres can be seen as an economical alternative. However, some mistrust is yet limiting the use of such materials, being one of the main reasons the inconsistency normally found in their mechanical properties. It should be noticed that these materials are more used for their low density than for their high stiffness. In this work, two different types of reinforced plates were compared: glass reinforced epoxy plate and sisal reinforced epoxy plate. For material characterization purposes, tensile and flexural tests were carried out. Main properties of both materials, like elastic modulus, tensile strength or flexural modulus, are presented and compared with reference values. Afterwards, plates were drilled under two different feed rates: low and high, with two diverse tools: twist and brad type drill, while cutting speed was kept constant. Thrust forces during drilling were monitored. Then, delamination area around the hole was assessed by using digital images that were processed using a computational platform previously developed. Finally, drilled plates were mechanically tested for bearing and open-hole resistance. Results were compared and correlated with the measured delamination. Conclusions contribute to the understanding of natural fibres reinforced plastics as a substitute to glass fibres reinforced plastics, helping on cost reductions without compromising reliability, as well as the consequence of delamination on mechanical resistance of this type of composites.
Peer review: yes
URI: http://hdl.handle.net/10400.22/4119
ISSN: 0255-5476
Versão do Editor: http://www.scientific.net/MSF.730-732.301
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