Modelling of cyclic plasticity and phase transformations during repeated local heating events in rail and wheel steels
Paper in proceedings, 2018

Short term local friction heating in railway operation might occur when a railway wheelset skids along the rail. The consequent temperature elevation is significant and in the pearlitic rail and wheel steels results in phase transformations. The temperature dependent differences in thermal expansion, density and mechanical properties of the phases result in residual stresses which can cause thermal damage in rail and wheel steels.

This study is an improvement of Finite Element (FE) modelling incorporating phase transformation kinetics law describing transformation and evolution of volume fraction of phases. The FE modelling has included coupled thermal and mechanical analysis to compute residual stresses near the wheel-rail contact.

FE analysis

Phase transformation

Isotropic and kinematic hardening

Thermal damage

Pearlitic steel

Residual stress

Author

Ali Esmaeili

Chalmers Railway Mechanics (CHARMEC)

Chalmers, Industrial and Materials Science, Material and Computational Mechanics

Johan Ahlström

Chalmers, Industrial and Materials Science, Engineering Materials

Chalmers Railway Mechanics (CHARMEC)

Magnus Ekh

Chalmers Railway Mechanics (CHARMEC)

Chalmers, Industrial and Materials Science, Material and Computational Mechanics

Proceedings - 11th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems

245-252

11th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems (CM2018)
Delft, Netherlands,

Research into enhanced tracks, switches and structures (In2Track)

European Commission (Horizon 2020), 2016-12-01 -- 2020-12-31.

Areas of Advance

Transport

Materials Science

Subject Categories

Applied Mechanics

Other Materials Engineering

Metallurgy and Metallic Materials

More information

Latest update

1/18/2019