CPL - Chalmers Publication Library
| Utbildning | Forskning | Styrkeområden | Om Chalmers | In English In English Ej inloggad.

Crack initiation caused by repeated local heating events – Modelling of possible mechanisms

Johan Ahlström (Institutionen för material- och tillverkningsteknik, Materialteknologi)
Proceedings of the 10th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems (CM2015). (2015)
[Konferensbidrag, refereegranskat]

Thermally initiated damage mechanisms by short-term local surface heating of a rail or wheel have been examined. A Finite Element (FE) model incorporating phase transformation from near pearlitic steel to austenite, and then to martensite was built to examine developing strength and residual stress fields. The FE model also incorporates thermal contraction on tempering of the martensite by following heat pulses. The material is modeled as isotropic, but with properties varying with phase, temperature and tempering state. Different thermal sequences that could cause crack initiation are examined.

Nyckelord: Finite element model, fatigue crack initiation, squat, stud, RCF crack cluster, thermal damage, phase transformation, martensite, residual stress



Den här publikationen ingår i följande styrkeområden:

Läs mer om Chalmers styrkeområden  

Denna post skapades 2016-01-28. Senast ändrad 2016-10-10.
CPL Pubid: 231469

 

Läs direkt!


Länk till annan sajt (kan kräva inloggning)