Delamination analysis of carbon fibre reinforced laminates: evaluation of a special step drill

• Type: Article in International Scientific Journal
• Date: 2009

Authors

António T. Marques (Author) FEUP; Luís M. Durão (Author) FEUP; António G. Magalhães (Author) FEUP; João Francisco Silva (Author) FEUP; João Manuel R. S. Tavares (Author) FEUP

Journal

Title: Composites Science and Technology

Vol. 69 No. 14

Pages: 2376-2382

ISSN: 0266-3538

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 71 Citations

ISI Web of Science

Scopus - 119 Citations

INSPEC

COMPENDEX

Scientific classification

FOS: Engineering and technology > Mechanical engineering

CORDIS: Technological sciences > Engineering > Materials engineering ; Technological sciences > Technology > Computer technology > Image processing

Other information

Authenticus ID: P-003-EHM

DOI: 10.1016/j.compscitech.2009.01.025

Abstract (EN): Drilling of carbon fibre/epoxy laminates is usually carried out using standard drills. However, it is necessary to adapt the processes and/or tooling as the risk of delamination, or other damages, is high. These problems can affect mechanical properties of produced parts, therefore, lower reliability. Production of higher quality holes is a challenge to everyone related with composites industry. In this paper, four different drills - three commercial and a special step (prototype) - are compared in terms of thrust force during drilling and delamination. In order to evaluate damage, enhanced radiography is applied. The resulting images were then computational processed using a previously developed image processing and analysis platform. Results show that the prototype drill had encouraging results in terms of maximum thrust force and delamination reduction. Furthermore, it is possible to state that a correct choice of drill geometry, cutting speed or feed rate can help delamination reduction.

Language: English

Type (Professor's evaluation): Scientific