Effect of Thrust Load Distribution along Drill Tip Geometry to the Final Drilling Damage on Composite Laminates

摘要

Composite drilling is quite different from metals at the aspect of damages after machining. With the weak out-of-plane material properties amplified with drilling mechanism, the major failure characteristics is resulted as delamination which is mostly by excessive thrust force from drill bit. Previous studies resulted that permanent damages are mostly related to the critical thrust value [1]. However, from the current studies, maximum thrust loads can be controllable by controlling machining conditions as well as using high performance drill bits.