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The Scientific World Journal
Volume 2014 (2014), Article ID 485205, 7 pages
Research Article

Surface Roughness Optimization of Polyamide-6/Nanoclay Nanocomposites Using Artificial Neural Network: Genetic Algorithm Approach

1Islamic Azad University of Kashan, Ghotbe Ravandi Boulevard, Kashan 87159 98151, Iran
2Faculty of Mechanical Engineering, University of Niš, Niš, Serbia
3Islamic Azad University, Badroud Branch, Badroud, Iran
4Islamic Azad University, Najafabad Branch, Najafabad, Iran

Received 8 August 2013; Accepted 4 December 2013; Published 21 January 2014

Academic Editors: H. E. Unalan and C. Ye

Copyright © 2014 Mehdi Moghri et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


During the past decade, polymer nanocomposites attracted considerable investment in research and development worldwide. One of the key factors that affect the quality of polymer nanocomposite products in machining is surface roughness. To obtain high quality products and reduce machining costs it is very important to determine the optimal machining conditions so as to achieve enhanced machining performance. The objective of this paper is to develop a predictive model using a combined design of experiments and artificial intelligence approach for optimization of surface roughness in milling of polyamide-6 (PA-6) nanocomposites. A surface roughness predictive model was developed in terms of milling parameters (spindle speed and feed rate) and nanoclay (NC) content using artificial neural network (ANN). As the present study deals with relatively small number of data obtained from full factorial design, application of genetic algorithm (GA) for ANN training is thought to be an appropriate approach for the purpose of developing accurate and robust ANN model. In the optimization phase, a GA is considered in conjunction with the explicit nonlinear function derived from the ANN to determine the optimal milling parameters for minimization of surface roughness for each PA-6 nanocomposite.