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Drilling tool geometry evaluation for reinforced composite laminates
Luís Miguel P. Durão; Daniel Joaquim Silva Gonçalves; João Manuel Ribeiro da Silva Tavares; Victor Hugo C. de AlbuquerqueIn 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 algorit...
Avaliação de ferramentas para a furação de laminados
L. M. P. Durão; Daniel Joaquim Silva Gonçalves; Victor Hugo Costa de Albuquerque; João Manuel Ribeiro da Silva TavaresA utilização crescente de materiais compósitos nos mais variados domínios coloca novos desafios no projecto de ferramentas de corte dedicadas a este tipo de materiais, ao invés da tradicional adaptação das ferramentas desenvolvidas para materiais metálicos. Neste artigo apresenta-se um estudo comparativo de geometrias de broca com o objectivo de reduzir o dano associado. Para tal, são analisadas as forças desen...
Evaluation of Tools and Cutting Conditions on Carbon Fibre Reinforced Laminates
Daniel Joaquim Silva Gonçalves; João Manuel Ribeiro Silva Tavares; Victor Hugo Costa Albuquerque; António Torres MarquesThe distinctive characteristics of carbon fibre reinforced plastics, like low weight or high specific strength, had broadened their use to new fields. Due to the need of assembly to structures, machining operations like drilling are frequent. In result of composites inhomogeneity, this operation can lead to different damages that reduce mechanical strength of the parts in the connection area. From these damages...
Drilling process of composite laminates : a tool based analysis
L. M. P. Durão; Daniel Joaquim Silva Gonçalves; João Manuel Ribeiro da Silva Tavares; Victor Hugo Costa de de Albuquerque; António Torres MarquesThe distinctive characteristics of carbon fibre reinforced plastics, like low weight or high specific strength, had broadened their use to new fields. In order to join different components by using bolts, rivets or screws, one of the machining operations needed in composite structures is drilling. Usually, it is accepted that drilling can be carried out using conventional tools and machinery with adaptations. H...
Tool Geometry Evaluation for Carbon Reinforced Composite Laminates
Daniel Joaquim Silva Gonçalves; João Manuel Ribeiro da Silva Tavares; António Torres Marques; Victor Hugo Costa de Albuquerque; Luís Miguel P. DurãoThe subject of this work is the study of drilling conditions and tool geometry in order to minimize delamination damage. Delamination is evaluated by enhanced radiography and damage criteria applied to compare different tools and cutting parameters.
Tool geometry evaluation for carbon reinforced composite laminates
L.M.P. Durão; Daniel Joaquim Silva Gonçalves; João Manuel Ribeiro da Silva Tavares; Victor Hugo Costa de Albuquerque; António Torres MarquesThe use of composite laminates in complex structures has increased significantly. However, there are still some issues when considering their use, mainly related with machining, leading to some difficulties and lack of acceptance. In this work, a methodology to evaluate drill geometry and feed rate based on thrust force and delamination extension is presented.
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