Drilling tool geometry evaluation for reinforced composite laminates

• Autor(a) principal: Durão, Luís M.
• Data de Publicação: 2010
• Outros Autores: Gonçalves, Daniel J. S., Tavares, João Manuel R. S., Albuquerque, Victor Hugo C. de, Vieira, A. Aguiar, Marques, A. T.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://hdl.handle.net/10400.22/4222
• topic: Drill geometry; Thrust force; Roughness measurement; Damage; Enhanced radiography; Image processing and analysis

In this work, a comparative study on different drill point geometries and feed rate for composite laminates drilling is presented. For this goal, thrust force monitoring during drilling, hole wall roughness measurement and delamination extension assessment after drilling is accomplished. Delamination is evaluated using enhanced radiography combined with a dedicated computational platform that integrates algorithms of image processing and analysis. An experimental procedure was planned and consequences were evaluated. Results show that a cautious combination of the factors involved, like drill tip geometry or feed rate, can promote the reduction of delamination damage.