engleski

The effect of cutting tool geometry on thrust force and delamination when drilling carbon fibre reinforced composite materials

Among the several machining processes, drilling is one of the most frequently used for the hole production for screws, rivets and bolts. Drilling of composite materials causes several damage modes, such as: delamination, fiber-pull out, edge chipping, spalling, uncut fibers, surface roughness and dimensional errors, and others. Delamination is a major problem associated with drilling fiber reinforced composite materials. It causes poor assembly tolerance, reduces structural integrity of material and the potential for long term performance deterioration. The thrust force has been cited as main cause of delamination. In this paper the objective was to establish correlation between cutting tool geometry, cutting velocity and feed rate with delamination during drilling carbon fibre reinforced composite materials. Drilling test were carried out on carbon epoxy composites using different twist drills.

drilling; carbon fibre reinfoeced composite materials; delamination

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