Whenever trains run in small radius curves wheel and rail wear phenomena are almost inevitable. The paper deals with a 119 m radius curve of a heavy metro infrastructure and its related wheel/rail contact issues. Due to unproper construction parameters (gauge and cant) and poor friction management, in addition to wheel flange wear on the outer wheel and rail corrugation on the low rail, an unusual tread wear of the inner wheel was found. The worn shape of the wheels also generated high impact forces over crossings. The paper describes the proposed countermeasures in terms of gauge modification and friction management improvements.
Management of wheel-rail damage in a tight metro curve / G. Megna, A. Bracciali. - ELETTRONICO. - (2025), pp. 0-0. ( 13th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems (CM2025) Tokyo, Japan 22/09/2025).
Management of wheel-rail damage in a tight metro curve
G. Megna
Writing – Original Draft Preparation
;A. BraccialiWriting – Review & Editing
2025
Abstract
Whenever trains run in small radius curves wheel and rail wear phenomena are almost inevitable. The paper deals with a 119 m radius curve of a heavy metro infrastructure and its related wheel/rail contact issues. Due to unproper construction parameters (gauge and cant) and poor friction management, in addition to wheel flange wear on the outer wheel and rail corrugation on the low rail, an unusual tread wear of the inner wheel was found. The worn shape of the wheels also generated high impact forces over crossings. The paper describes the proposed countermeasures in terms of gauge modification and friction management improvements.
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