Correspondence to: <email@example.com>
Recommended for acceptance by João Manuel R. S. Tavares and Renato Natal Jorge
ELCVIA ISSN: 1577-5097
Published by Computer Vision Center / Universitat Autonoma de Barcelona, Barcelona, Spain
Electronic Letters on Computer Vision and Image Analysis 7(2): 11-21, 2008
Analyzing objects in images for estimating the delamination
influence on load carrying capacity of composite laminates
Luís Miguel Durão*, António G. Magalhães*, João Manuel R. S. Tavares+, A. Torres Marques+
*Centro de Investigação e Desenvolvimento de Engenharia Mecânica, Instituto Superior de Engenharia do Porto /
Departamento de Engenharia Mecânica, R. Dr. António Bernardino de Almeida, 431 – PORTO, Portugal
+Instituto de Engenharia Mecânica e Gestão Industrial, Faculdade de Engenharia da Universidade do Porto /
Departamento de Engenharia Mecânica e Gestão Industrial, Rua Dr. Roberto Frias, s/n – PORTO, Portugal
Received 10th November 2007; Revised 5th May 2008; Accepted 11th June 2008
The use of fiber reinforced plastics has increased in the last decades due to their unique properties.
Advantages of their use are related with low weight, high strength and stiffness. Drilling of composite plates can
be carried out in conventional machinery with some adaptations. However, the presence of typical defects like
delamination can affect mechanical properties of produced parts. In this paper delamination influence in bearing
stress of drilled hybrid carbon+glass/epoxy quasi-isotropic plates is studied by using image processing and
analysis techniques. Results from bearing test show that damage minimization is an important mean to improve
mechanical properties of the joint area of the plate. The appropriateness of the image processing and analysis
techniques used in the measurement of the damaged area is demonstrated.
Key Words: Drilling, Delamination, Laminates, Radiography, Ultrasonic Scanning, Image Analysis, Image
Segmentation, Regions Analysis.