TY JOUR TI IMPACT OF CORRUGATION AND ROUGHNESS OF SURFACE UPON NORMAL CONTACT STIFFNESS OF FLAT JOINT KW corrugation KW roughness KW contact stiffness KW fractal model KW simulation JO Bulletin of Bryansk state technical university AU Tikhomirov, V.P. AU Izmerov, M.A. PY 2019 IS 2019 PB Bryansk State Technical University