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)
Chalmers, Industri- och materialvetenskap, Material- och beräkningsmekanik
Anders Ekberg
Chalmers, Mekanik och maritima vetenskaper, Dynamik
Fredrik Larsson
Chalmers, Industri- och materialvetenskap, Material- och beräkningsmekanik
Finansiering
Chalmers järnvägsmekanik (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