1. Department of Machine Manufacturing Technology “Gheorghe Asachi” Technical University of Iasi Blvd. Mangeron, No. 59A Iasi 700050 Romania
2. Faculty of Engineering “Vasile Alecsandri” University of Bacau Calea Maraserti 157 Bacau 600115 Romania
3. Department of Structural Engineering “Gheorghe Asachi” Technical University of Iasi Blvd. Mangeron, No. 1 Iasi 70050 Romania
4. Academy of Romanian Scientists Str. Ilfov, Nr. 3, Sector 5 Bucharest Romania