NUMERICAL PREDICTION OF ROLLING CONTACT FATIGUE CRACK GROWTH IN A RAILHEAD
Paper i 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
Författare
Mohammad Salahi Nezhad
Chalmers, Industri- och materialvetenskap, Material- och beräkningsmekanik
Fredrik Larsson
Chalmers, Industri- och materialvetenskap, Material- och beräkningsmekanik
Elena Kabo
Chalmers, Mekanik och maritima vetenskaper, Dynamik
Anders Ekberg
Chalmers, Mekanik och maritima vetenskaper, Dynamik
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,
Ämneskategorier
Tribologi
Teknisk mekanik
Bearbetnings-, yt- och fogningsteknik