Effect of workpiece stiffness on thrust force and delamination in drilling thin composite laminates
作者： Bin Luo , Yuan Li , Kaifu Zhang , Hui Cheng , Shunuan Liu
关键词: Structural engineering 、 Critical value 、 Drill 、 Specific energy 、 Composite laminates 、 Materials science 、 Deflection (engineering) 、 Drilling 、 Stiffness 、 Thrust 、 Composite material
摘要: During drilling thin composite laminates, workpiece stiffness affects process through bending and release movement. A new mechanical model for thrust force prediction was developed to quantitatively describe influence of stiffness. Its effect on delamination also investigated. Derivative deflection caused by calculated obtain dynamic feed rate. Then, predicted as a function drill geometry, specific energy Experiments woven CFRP plates had been performed with different rate unsupported length. Results showed that the presented could fit measurement nicely except exit stage, in which local deformation crack uncut material brought forward drop point. Delamination damage observed at low even though did not exceed critical value. Analysis results indicated more suitable parameter delam...
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