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Finite element analysis of the frictional wheel-rail rolling contact using explicit and implicit methods.pdf
Wear 366-367 (2016) 157–166
Contents lists available at ScienceDirect
Wear
journal homepage: /locate/wear
Finite element analysis of the frictional wheel-rail rolling contact using explicit and implicit methods
Moncef Toumi a,b,c,n, Hugues Chollet a, Honoré Yin b
a Department of COSYS/GRETTIA, IFSTTAR, 14-20 Boulevard Newton, Champs sur Marne, France b Laboratoire Navier, UMR8205, école des Ponts, IFSTTAR, CNRS, UPE, Champs-sur-Marne, France c IRT RAILENIUM, Technop?le Transalley, 180 Rue Joseph-Louis Lagrange 59308, Valenciennes, France
article info
Article history: Received 6 October 2015 Received in revised form 1 June 2016 Accepted 8 June 2016 Available online 15 June 2016
Keywords: Rolling contact Rail-wheel tribology Friction Finite element modeling Creep–force curve
abstract
A three-dimensional ?nite element rolling contact model between wheel and rail with increased spin effect is developed in this paper to study the normal and the tangential contact problems, as well as the creep force characteristics in elasticity and in elasto-plasticity. Three ?nite element analyzes using the explicit and the implicit integration scheme are employed and the ?nite element solution is compared to the solution of the CONTACT software in elasticity. The elastic solution with the implicit methods is sensitive to the energy dissipation related to the time increment size. The optimum time increment size is found as a compromise between computational ef?ciency and calculation accuracy. The numerical results show a good agreement between the ?nite element methods and CONTACT for the normal and the tangential contact solution. The initial slopes of the creep force characteristics in the longitudinal and the lateral direction from the implicit solution are slightly lower than the results from CONTACT. When the elasto-plastic material behavior is applied, the maximum contact pressure and the von Mises stresses are reduced for both explicit and implicit methods and the plastic deform
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