Table of Contents
Advances in Optical Technologies
Volume 2012, Article ID 720813, 7 pages
http://dx.doi.org/10.1155/2012/720813
Research Article

Monitoring Composites under Bending Tests with Infrared Thermography

1Department of Aerospace Engineering (DIAS), University of Naples Federico II, Via Claudio 21, 80125 Naples, Italy
2Department of Aerospace Engineering (DIAS), University of Naples Federico II, Piazzale Tecchio 80, 80125 Naples, Italy
3CNR-SPIN, Piazzale Tecchio 80, 80125 Naples, Italy

Received 2 August 2012; Accepted 2 October 2012

Academic Editor: Antoni Rogalski

Copyright © 2012 Carosena Meola et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The attention of the present paper is focused on the use of an infrared imaging device to monitor the thermal response of composite materials under cyclic bending. Three types of composites are considered including an epoxy matrix reinforced with either carbon fibres (CFRP) or glass fibres (GFRP) and a hybrid composite involving glass fibres and aluminium layers (FRML). The specimen surface, under bending, displays temperature variations pursuing the load variations with cooling down under tension and warming up under compression; such temperature variations are in agreement with the bending moment. It has been observed that the amplitude of temperature variations over the specimen surface depends on the material characteristics. In particular, the presence of a defect inside the material affects the temperature distribution with deviation from the usual bending moment trend.