Drilling delamination outcomes on glass and sisal reinforced plastics

• Type: Article in International Scientific Journal
• Date: 2013

Authors

Luís Miguel P. Durão (Author) FEUP; Daniel J. S. Gonçalves (Author) FEUP; João Manuel R. S. Tavares (Author) FEUP; Victor Hugo C. de Albuquerque (Author) FEUP; Túlio H. Panzera (Author) Other; Leandro J. Silva (Author) Other; A.A. Vieira (Author) FEUP; A. M. Baptista (Author) FEUP

Journal

Title: Materials Science Forum

Vol. 730-732

Pages: 301-306

ISSN: 0255-5476

Publisher: Trans Tech Publications Ltd

Indexing

ISI Web of Science

Scopus

INSPEC

COMPENDEX

Scientific classification

FOS: Engineering and technology > Other engineering and technologies

CORDIS: Technological sciences

Other information

Authenticus ID: P-00J-5RS

DOI: 10.4028/www.scientific.net/MSF.730-732.301

Abstract (EN): 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.

Language: English

Type (Professor's evaluation): Scientific