European Journal of Scientific Research ISSN 1450-216X Vol.41 No.1 (2010), pp.84-98 © EuroJournals Publishing, Inc. 2010 http://www.eurojournals.com/ejsr.htm Surface Roughness Analysis in Machining of GFRP Composites by Carbide Tool (K20) Syed Altaf Hussain Department of Mechanical Engineering, R.G.M College of Engineering & Technology Nandyal-518501, A.P., India E-mail: s_a_hussain1@Rediffmail.com Tel: +91 9989003426 V. Pandurangadu Departments of Mechanical Engineering, J.N.T.Univrsity, Anantapur-515002, A.P., India E-mail: pandu_rangadu2001@yahoo.com Tel: +919440686695 K. Palanikumar Department of Mechanical Engineering, Sri Sai Ram Institute of Technology Chennai-44, T.N, India E-mail: kumarlatha@gmail.com Tel:+91 9677053338 Abstract Nowadays, glass fiber reinforced plastics (GFRP) play a vital role in many engineering applications as an alternative to various heavy exotic materials. In GFRP composites, the matrix of polymer (resin) is reinforced with glass fibers. However, the users of FRP are facing difficulties to machine it, because if fiber delamination, fiber pullout, short tool life, matrix debonding, burning and formation of powder like chips. The surface quality and dimensional precision greatly affect the parts during their useful life, especially in cases where the components come in contact with other elements or materials. The present work deals with the study and development of a surface roughness prediction Experiments were conducted through the established Taguchi’s Design of Experiments (DOE) on an all geared lathe using carbide (K20) tool. The cutting parameters considered were cutting speed, feed, depth of cut, and work piece (fiber orientation). A second order mathematical model in terms of cutting parameters was developed using RSM. The results indicate that the developed model is suitable for prediction of surface roughness in machining of GFRP composites. The effect of different parameters on surface roughness are analyzed and presented in this study. Keywords: GFRP composites, Modeling, Response Surface methodology, Surface roughness, Carbide tool (K20). model for the machining of GFRP tubes using Response Surface Methodology (RSM).