Crack initiation in anisotropic wheel/rail material
Forskningsprojekt, 2021 – 2026

Rolling Contact Fatigue (RCF) crack initiation is often connected to the accumulation of plastic deformation in the surface layer of rails and wheels. The behavior and strength of this highly deformed and anisotropic layer are thus key properties of rail and wheel materials. An experimental technique to analyse and measure these properties has been developed and exploited in the CHARMEC project MU34. Here an axial-torsion testing machine is used to subject the material to loading conditions similar to RCF loading. Starting out from these experiments and numerical models developed in MU34, the current project aims to exploit and further develop fatigue crack initiation criteria for the anisotropic material. Additional experimental studies will be conducted in co-operation with the project MU35. Another important aim is to improve the modelling of the anisotropic material with respect to long-term cyclic and multiaxial loading. Throughout the project, the finite element method will be used to simulate rolling contact conditions and it will be investigated how field measurements can be used to improve and validate the modelling.

Deltagare

Nasrin Talebi (kontakt)

Chalmers, Industri- och materialvetenskap, Material- och beräkningsmekanik

Johan Ahlström

Chalmers, Industri- och materialvetenskap, Konstruktionsmaterial

Magnus Ekh

Chalmers, Industri- och materialvetenskap, Material- och beräkningsmekanik

Fredrik Larsson

Chalmers, Industri- och materialvetenskap, Material- och beräkningsmekanik

Knut Andreas Meyer

Chalmers, Industri- och materialvetenskap, Material- och beräkningsmekanik

Samarbetspartners

Trafikverket

Borlänge, Sweden

voestalpine Schienen GmbH

Leoben, Austria

Finansiering

Chalmers järnvägsmekanik (CHARMEC)

Projekt-id: MU41
Finansierar Chalmers deltagande under 2021–2026

Europeiska kommissionen (EU)

Projekt-id: EC/H2020/730848
Finansierar Chalmers deltagande under 2021–2023

Relaterade styrkeområden och infrastruktur

Transport

Styrkeområden

C3SE (Chalmers Centre for Computational Science and Engineering)

Infrastruktur

Materialvetenskap

Styrkeområden

Publikationer

Mer information

Senast uppdaterat

2023-12-19