Original scientific paper
https://doi.org/10.17559/TV-20151227221434
The effect of cracks on stress state in crane wheel hard-surface under contact loading
Drakče Tanasković
orcid.org/0000-0002-0297-8796
; Steel mill facility "Železare Smederevo", Radinac, 11300 Smederevo, Serbia
Uroš Tatić
; Innovation Center of Faculty of Mechanical Engineering, Kraljice Marije 16, 11000 Belgrade, Serbia
Branislav Đorđević
; Innovation Center of Faculty of Mechanical Engineering, Kraljice Marije 16, 11000 Belgrade, Serbia
Simon Sedmak
orcid.org/0000-0002-2674-541X
; Innovation Center of Faculty of Mechanical Engineering, Kraljice Marije 16, 11000 Belgrade, Serbia
Aleksandar Sedmak
; Faculty of Mechanical Engineering, Kraljice Marije 16, 11000 Belgrade, Serbia
Abstract
Shown in this paper are the results of microstructure testing of crane wheels, along with the repair welding procedure performed by hard-surfacing. Repair welding involved the application of a welded layer to the crane wheel, due to the damage that was caused by wear. Detailed analyses, based on the mechanical and chemical properties of the materials used for crane wheels, as well as for repair welding, were performed for the contact between the rail and wheel in real exploitation conditions, as well as by using numerical simulations. Numerical simulations were performed by using the finite element method. For the purpose of the analysis, contact stresses between the wheel and rail were calculated according to Hertz theory. Each of the numerical models was used to perform stress analysis with or without a crack in order to determine crack influence on the crane wheel integrity, and to compare the results with the values obtained theoretically. In addition, the symmetry of the contact area between the wheel and rail was taken into account, i.e. both symmetric and asymmetric contact models were made.
Keywords
crack; FEM; hard-surfacing; integrity; microstructure; rail; wear; wheel
Hrčak ID:
181256
URI
Publication date:
10.5.2017.
Visits: 2.171 *