António J. M. Ferreira is Professor of mechanical engineering at the University of Porto, Portugal. He is mainly engaged in the research of composite materials and has high attainments in the field of composite mechanical engineering.

¿Lucas F. M. da Silva is Full Professor in the Department of Mechanical Engineering at the Faculty of Engineering of the University of Porto (FEUP). He leads the Advanced Joining Processes Unit (AJPU) of the Institute of Science and Innovation in Mechanical Engineering and Industrial Engineering (INEGI).