TY JOUR TI Computer simulation technique for drilling process of titanium alloy and composite material complex packages using digital twins KW complex package KW titanium alloy KW composite material KW drilling KW ultrasound KW simulation KW digital twin KW surface quality JO Science intensive technologies in mechanical engineering AU Kiselyov, E.S. AU Ilyushkin, M.V. PY 2023 IS 2023 PB Bryansk State Technical University