NUMERICAL PREDICTION OF ROLLING CONTACT FATIGUE CRACK GROWTH IN A RAILHEAD
Paper in proceeding, 2022
The influence of crack face friction on predicted crack paths in a 2D rail model is investigated numerically. A surface-breaking inclined rolling contact fatigue crack is propagated under a moving contact load, combined thermal and contact load, and combined (rail) bending and contact. Coulomb crack face friction is included. The growth direction is predicted using an accumulated vector crack tip displacement criterion. Frictional cracks are found to grow deeper into the rail under pure contact load and combined bending and contact while friction has a moderate influence under combined thermal and contact loads. Furthermore, friction reduces crack growth rates.
Crack growth direction
Vector crack tip displacement
Finite element modeling
Crack propagation
Crack face friction
Rolling contact fatigue
Author
Mohammad Salahi Nezhad
Chalmers, Industrial and Materials Science, Material and Computational Mechanics
Fredrik Larsson
Chalmers, Industrial and Materials Science, Material and Computational Mechanics
Elena Kabo
Chalmers, Mechanics and Maritime Sciences (M2), Dynamics
Anders Ekberg
Chalmers, Mechanics and Maritime Sciences (M2), Dynamics
CM 2022 - 12th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems, Conference Proceedings
428-435
9780646865881 (ISBN)
12th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems, CM 2022
Melbourne, Australia,
Melbourne, Australia,
Subject Categories
Tribology
Applied Mechanics
Manufacturing, Surface and Joining Technology