TY JOUR TI THEORETICAL STUDY OF THE MECHANISM OF FORMING DEFECTS ON THE ROLLING SURFACE OF WHEEL PAIRS OF THE ROLLING STOCK KW wheel pair KW surface KW brake system KW slid flat KW shelled tread KW weld-on deposit JO Transport engineering AU Kudyarov, I.A. AU Ivanov, P.Y. AU Moskovskih, K.A. AU Dulsky, E.Y. PY 2026 IS 2026 PB Bryansk State Technical University