Wheel wear performance assessment and model validation using Harold full scale test rig

The railway industry has focused on the improvement of maintenance through use novel technologies. Recently, utilisation repair welding to restore worn area wheels been investigated, as it can bring significant savings in wheelset maintenance. Under an Innovate UK AURORA project, a wheel that previously operated London Underground (LUL) was restored using this process. To test its performance and compare with new standard steel grade wheel, HAROLD full scale rig used which LUL vehicle bogie equipped both R9 under representative lateral yaw displacements computed from dynamics simulations. wear measurements carried out at end cycles showed although suffered initial higher wear, levels reduced became similar wheel. Furthermore, full-scale testing provided opportunity validate model predictions were conducted simulations utilised inputs. It found while flange higher, tread estimations smaller than