Title: Delamination in carbon/epoxy plates drilling: tool and feed rate effect

Authors: Luís Miguel Pereira Durão; Daniel Gonçalves; João Manuel R.S. Tavares; Victor Hugo C. De Albuquerque; António Manuel Rincon De Aguiar Vieira; António Paulo Monteiro Baptista

Addresses: ISEP/CIDEM – School of Engineering, Polytechnic of Porto, R. Dr. António Bernardino de Almeida, 431 – 4200-072 Porto, Portugal ' ISEP/CIDEM – School of Engineering, Polytechnic of Porto, R. Dr. António Bernardino de Almeida, 431 – 4200-072 Porto, Portugal ' Instituto de Engenharia Mecânica e Gestão Industrial, Departamento de Engenharia Mecânica, Faculdade de Engenharia, Universidade do Porto, Rua Dr. 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, CE, Brazil ' Instituto de Engenharia Mecânica e Gestão Industrial, Departamento de Engenharia Mecânica, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, s/n-4200-465 Porto, Portugal ' Instituto de Engenharia Mecânica e Gestão Industrial, Departamento de Engenharia Mecânica, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, s/n-4200-465 Porto, Portugal

Abstract: The attractive characteristics of carbon fibre reinforced plastics had their widespread use. In order to join different components, drilling is often necessary. It is known that a drilling process that reduces the drill thrust force can decrease the risk of delamination. In this work, three combinations of the drilling process are compared: tool diameter, tool geometry and feed rate. The parameters studied were: thrust force, delamination extension and mechanical strength of the drilled region-bearing test. This work demonstrates that a proper combination of the drilling variables can contribute to reduce the delamination damage and, consequently, enhance mechanical resistance of the joint.

Keywords: composite materials; drilling; tool geometry; tool diameter; feed rate; thrust force; delamination extension; radiography; mechanical testing; carbon epoxy plates; composites; carbon fibre reinforced plastics; CFRP.

DOI: 10.1504/IJMPT.2014.064935

International Journal of Materials and Product Technology, 2014 Vol.49 No.4, pp.267 - 284

Accepted: 10 Mar 2014
Published online: 30 Sep 2014 *

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