1. ESTiG, Polytechnic Institute of Bragança, C. Sta Apolónia, 5301-857 Bragança, Portugal
2. CEFT, DEMec, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
3. MEtRiCS, Mechanical Engineering Department, University of Minho, Campus de Azurém, 4800-058 Guimarães, Portugal