The rail, as the most important component of the track superstructure, has to meet the following requirements : – High wear resistance; – High resistance to deformation caused by compression; – High fatigue strength; – High yield strength, toughness/tensile strength and hardness; – High resistance to brittle fracture; – Good weldability; – High degree of steel purity and good texture; – Profile evenness and dimensions accuracy by inspection and acceptance; – Low residual stresses after manufacturing and straightening.
Despite this, the standard EN 13674 defines the maximum longitudinal residual stress in the rail foot 250 MPa for all steel grades. This value is ca. 300% of the value in the Smith diagram (max. 80 MPa)!
What value of residual stress should be taken in the calculations of railway superstructure?
Thank you in advance for your reply!
Hi dear Zdenka
Please see:
https://www.researchgate.net/publication/323254577_Rolling_contact_fatigue_analysis_of_rails_under_the_influence_of_residual_stresses_induced_by_manufacturing?_sg=Ey8JXqqxQldoLVE-rQy8mr___gY0wnOIgFUt3_-UNYqGqnFD7xTcPmtJAPOBY3KsEwm9yIyPtpWyl9jxqDUJdaDssxnK45DPhOCdBSNv.2iW7fRH75YulWUZh2mnmurdCjpY3S33lnouMGao38sWs38fZq2s7boghGSemrUgRNcYlSoibI331yvEbzqv55Q
Regards,
Reza
- Badges
- Science topic
- Similar topics
- Entomology
- Resistance