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

Författare

Ali Esmaeili

CHARMEC

Chalmers, Industri- och materialvetenskap, Material- och beräkningsmekanik

Johan Ahlström

Chalmers, Industri- och materialvetenskap, Konstruktionsmaterial

CHARMEC

Magnus Ekh

CHARMEC

Chalmers, Industri- och materialvetenskap, Material- och beräkningsmekanik

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,

In2Track

Europeiska kommissionen (Horisont 2020), 2016-12-01 -- 2020-12-31.

Styrkeområden

Transport

Materialvetenskap

Ämneskategorier

Teknisk mekanik

Annan materialteknik

Metallurgi och metalliska material

Mer information

Senast uppdaterat

2019-01-18