А.М. Krupenin - Post-graduate Student, Department of Resistance of Materials, Moscow Aviation Institute (National Research University) E-mail: zeus-russ@yandex.ru М.I. Martirosov - Ph.D. (Eng.), Associate Professor, Department of Resistance of Materials, Moscow Aviation Institute (National Research University) L.N. Rabinsky - Dr.Sc. (Phys.-Math.), Professor, Dean of the Faculty of Applied Mechanics, Moscow Aviation Institute (National Research University)