1. Federal University of Rio Grande do Norte, Natal, Brazil & Federal Rural University of the Semi-Arid Region, Mossoró, Brazil Faculty of Engineering, University of Porto, Porto, Portugal
2. Faculty of Engineering, University of Porto, Porto, Portugal
3. Federal University of Rio Grande do Norte, Natal, Brazil
4. Faculty of Mechanical Engineering, Department of Mechanics, Material Science and Engineering, Wrocław University of Science and Technology, Smoluchowskiego 25, 50-370 Wrocław, Poland