Experimental investigation of carbon nanotube addition on delamination induced drilling of glass-epoxy composites

Nowadays, using composite materials has been grown increasingly especially in aerospace and automobile manufacturing. Composite drilling is the main machining process for assembling the composite components. The damages caused by drilling process, such as delamination, fiber breakage, fiber pull out and matrix cracking around the hole can decrease the residual strength of drilled components. In this paper, the effect of drilling parameters such as feed rate, spindle speed and drill diameter on the thrust force, delamination for composite specimens with different percentages of nano fibers are discussed. Taguchi method is used for Designing of Experiment to analysis effect of machining parameters (feed rate, spindle speed, drill diameter) and percentage of nano particles on the thrust force and delamination factor. The results show that by increasing carbon nano tube up to a special percentage (about 5%) delamination and thrust force decrease. Also, by decreasing feed rate and increasing spindle speed, thrust force and delamination factor decrease