Optimization of Machinability of Polyester/Modified Jute Fabric Composite Using Grey Relational Analysis (GRA)

Due to their specific properties, natural fiber based composites are being widely used. Those bio-composites are less density materials that require less energy during machining and production. Due to hydrophilic nature of fiber, the bonding between matrix and fiber is weak. To enhance this quality, various chemical treatments are used. Mercerization process has been reported widely by many as a process that improves the mechanical properties of composite significantly. The aim of this work is to present a comparison of machinability of jute fiber reinforced composite prepared by using untreated and alkali treated fiber. Drilling was carried out in a Vertical Machining Centre using HSS twist drill. The quality of hole is compared based on the delamination factor obtained by digital image processing technique, on both sides. Factorial design based experiments were conducted at different levels of speed and feed rate. Analysis of variance has been used to study the influence of chemical treatment on delamination. GRA is employed to find the optimum drilling condition. (C) 2013 The Authors. Published by Elsevier Ltd.