Table of Contents
International Journal of Manufacturing Engineering
Volume 2014 (2014), Article ID 598531, 13 pages
Research Article

Characterization and Optimization of Mechanical Properties of ABS Parts Manufactured by the Fused Deposition Modelling Process

School of Mechanical and Electrical Engineering & Technology, Faculty of Applied Science and Technology, Sheridan Institute of Technology and Advanced Learning, Brampton, ON, Canada L6Y 5H9

Received 7 July 2014; Accepted 10 October 2014; Published 10 November 2014

Academic Editor: Luigino Filice

Copyright © 2014 Godfrey C. Onwubolu and Farzad Rayegani. 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.


While fused deposition modelling (FDM) is one of the most used additive manufacturing (AM) techniques today due to its ability to manufacture very complex geometries, the major research issues have been to balance ability to produce aesthetically appealing looking products with functionality. In this study, five important process parameters such as layer thickness, part orientation, raster angle, raster width, and air gap have been considered to study their effects on tensile strength of test specimen, using design of experiment (DOE). Using group method of data handling (GMDH), mathematical models relating the response with the process parameters have been developed. Using differential evolution (DE), optimal process parameters have been found to achieve good strength simultaneously for the response. The optimization of the mathematical model realized results in maximized tensile strength. Consequently, the additive manufacturing part produced is improved by optimizing the process parameters. The predicted models obtained show good correlation with the measured values and can be used to generalize prediction for process conditions outside the current study. Results obtained are very promising and hence the approach presented in this paper has practical applications for design and manufacture of parts using additive manufacturing technologies.