1. Design and Manufacturing Laboratory, School of Technology, University of Thessaly, Karditsa 43100, Greece
2. Mechanical Engineering Department, Hellenic Mediterranean University, Heraklion 71410, Greece
3. Manufacturing Department, Cranfield University, Cranfield MK10 7GT, UK
4. Mechanical Engineering Educators Department, School of Pedagogical and Technological Education (ASPETE), Athens 15122, Greece