TY JOUR TI Friction of mtl-metal surfaces KW fractal KW friction ratio KW fractal dimension KW contact load JO Science intensive technologies in mechanical engineering AU Tikhomirov, V.P. AU Izmerov, M.A. AU Kuznetsov, S.V. AU Gornostaeva, A.G. PY 2022 IS 2022 PB Bryansk State Technical University