1. INEGI-Institute of Science and Innovation in Mechanical and Industrial Engineering; University of Porto; Rua Dr. Roberto Frias 400 4200-465 Porto Portugal
2. BAM Federal Institute for Materials Research and Testing; Unter den Eichen 87 D-12205 Berlin Germany
3. LEPABE, Faculdade de Engenharia; Universidade do Porto; Rua Dr. Roberto Frias 4200-465 Porto Portugal