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Materials 2014, 7(5), 3802-3819; doi:10.3390/ma7053802

Drilling Damage in Composite Material

ISEP/CIDEM, School of Engineering-Polytechnic of Porto, Rua Doutor António Bernardino de Almeida, 431, Porto 4200-072, Portugal
Instituto de Engenharia Mecânica e Gestão Industrial (INEGI), Departamento de Engenharia Mecânica (DEMec), Faculdade de Engenharia, Universidade do Porto (FEUP), Rua Doutor Roberto Frias, s/n, 4200-465 Porto, Portugal
Programa de Pós-Graduação em Informática Aplicada (PPGIA), Universidade de Fortaleza (UNIFOR), Av. Washington Soares, 1321, Sala J30, CEP 60.811-905, Edson Queiroz, Fortaleza, Brazil
Author to whom correspondence should be addressed.
Received: 27 February 2014 / Revised: 29 April 2014 / Accepted: 8 May 2014 / Published: 14 May 2014
(This article belongs to the Special Issue Carbon Fibers)
View Full-Text   |   Download PDF [603 KB, uploaded 14 May 2014]   |  


The characteristics of carbon fibre reinforced laminates have widened their use from aerospace to domestic appliances, and new possibilities for their usage emerge almost daily. In many of the possible applications, the laminates need to be drilled for assembly purposes. It is known that a drilling process that reduces the drill thrust force can decrease the risk of delamination. In this work, damage assessment methods based on data extracted from radiographic images are compared and correlated with mechanical test results—bearing test and delamination onset test—and analytical models. The results demonstrate the importance of an adequate selection of drilling tools and machining parameters to extend the life cycle of these laminates as a consequence of enhanced reliability. View Full-Text
Keywords: fiber reinforced composites; carbon fibers; drilling; thrust force; delamination; radiography; computational image processing and analysis; bearing test fiber reinforced composites; carbon fibers; drilling; thrust force; delamination; radiography; computational image processing and analysis; bearing test

This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Durão, L.M.P.; Tavares, J.M.R.; de Albuquerque, V.H.C.; Marques, J.F.S.; Andrade, O.N. Drilling Damage in Composite Material. Materials 2014, 7, 3802-3819.

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