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Información de la revista
Vol. 28. Núm. 2.
Páginas 147-154 (julio - diciembre 2016)
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Vol. 28. Núm. 2.
Páginas 147-154 (julio - diciembre 2016)
Acceso a texto completo
Strategies on implementing a potential self-healing functionality in a composite structure
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X. Tsilimigkraa, A. Baltopoulosa, S. Tsantzalisa, A. Kotrotsosa, N. Siakavellasb, V. Kostopoulosa,
Autor para correspondencia
kostopoulos@mech.upatras.gr

Corresponding author.
, S. Flórezc
a Applied Mechanics Laboratory, Department of Mechanical Engineering & Aeronautics, University of Patras, Patras University Campus, GR 265 00 Patras, Greece
b Nuclear Technology Laboratory, Department of Mechanical Engineering & Aeronautics, University of Patras, Patras University Campus, GR 265 00 Patras, Greece
c Industry and Transport Unit, Tecnalia, Parque Tecnológico de San Sebastián, Paseo Mikeletegi,2, E-20009 San Sebastian, Spain
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Abstract

Deteriorations generated in service can cause catastrophic failure at the specific properties of the polymer composite materials. In view of this, scientists have drawn inspirations by natural biological systems and their unique ability to heal an external wound, to develop a similar repair system within a material. Carbon and glass fiber reinforced polymers were manufactured following the wet lay up or the prepreg process. Microcapsules at contents, 5% or 10% by weight, vascular networks from wax and steel wires and finally reversible polymers were implemented within a composite as a potential self-healing system. Inspection techniques, including Ultrasonic C-Scan and Infrared Thermography, were applied, where possible. Optical microscopy revealed the disruption of the composite structural integrity, regarding the observed ply waviness and the resin reach zones around the vascular structures. Three point bending experiments determined the knock down factor, expressed as a decrease on flexural strength and modulus values, for each case, compared to the reference material. The reduction ranged from 12%-64% depending mainly not only to the selected manufacturing method but also to the different implemented healing system.

Keywords:
Composites
self-healing functionality
implementation strategies
knock down factor
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Copyright © 2016. Portuguese Society of Materials (SPM)
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