Effect of Thrust Force and Torque Analysis on Chemically Treated Kevlar Reinforced Composites during Drilling Process

Composites applications are widely used in many areas. Due to the enhancement of various properties. Now a days kevlar composite has widely used because of various properties like tensile , compression, shear. Drilling is the majority important machining process in making assembly of components within a negligible tolerance. Drilling in kevlar composites is difficult due its extradionary mechanical properties like high toughness and hardness. Thrust force and torque are the major influences for delamination during various machining of reinforcement polymer composites. Various paramaters are considered to reduce defects like delamination and fiber crushing. It is found from various literature reviews surface modification has enhancing the intermolecular bonding strength between fiber reinforced layers. Our paper deals with affect of process parameters on thrust force with respect to torque during drilling of Kevlar composites with and without chemically treated fibers. The composite lamina is prepared for the investigation of 60/40 kevlar-polyester resin on weight basis. The chemicals are used to treat the fibers such as Dichloromethane, methanol and distilled water with specified intervals of time. Twist and core drill bits are used to make holes. Results suggested that twist drill with chemically treated fiber having minimum thrust force. Our aim to identify the minimum delamination of composites.