Simulering av spricktillväxt i räl under rullkontaktutmattning
Forskningsprojekt , 2014 – 2019

Rolling contact fatigue (RCF) cracks form on the surface of the rails due to compressive and frictional stresses induced on the rail at the wheel/rail contact patch. After a stage of low-angled growth, the cracks may propagate a) upwards, causing spalling of the rail material, b) downwards, causing complete local failure of the rail, c) along the initial low-angled plane of growth. The project aims in the development of criteria for capturing the direction and rate of crack propagation  in a general non-linear growth setting. The developed criteria along with already existing criteria from the literature are evaluated against known crack paths and rates from mixed-mode crack growth experiments. Criteria that perform best will be used in the development of a numerical tool for simulation of RCF crack evolution.   

Deltagare

Dimosthenis Floros (kontakt)

Doktorand vid Chalmers, Industri- och materialvetenskap, Material- och beräkningsmekanik

Anders Ekberg

Biträdande professor vid Chalmers, Mekanik och maritima vetenskaper, Dynamik

Fredrik Larsson

Professor vid Chalmers, Industri- och materialvetenskap, Material- och beräkningsmekanik

Finansiering

CHARMEC

Finansierar Chalmers deltagande under 2014–2019

Trafikverket

Finansierar Chalmers deltagande under 2014–2015

Relaterade styrkeområden och infrastruktur

Transport

Styrkeområden

C3SE (Chalmers Centre for Computational Science and Engineering)

Infrastruktur

Mer information

Senast uppdaterat

2018-02-17