1. Kaunas University of Technology, Faculty of Mechanical Engineering and Design, Kaunas, Lithuania, EU, regita.bendikiene@ktu.lt; antanas.ciuplys@ktu.lt; ramunas.cesnavicius@ktu.lt; vytautas.grigas@ktu.lt; audrius.jutas@ktu.lt
2. Belarusian State University, Faculty of Mechanics and Mathematics, Department of Theoretical and Applied Mechanics, Nezavisimosti ave 4, 220030 Minsk, Belarus, bogal@tut.by; marmyshdenis@mail.ru; oleg.nasan@gmail.com; shemetla@yandex.ru; sherbakovss@mail.ru