Author
Mansouri, Deniz, Şendur, Polat, Yapıcı, Güney Güven
Publication Date
2020-03-16
Publication Place
-
Taylor & Francis
Subject
Fatigue, Ratchetting, Continuous welded rails, Hardening, Plastic strain
Type
Periodical
Language
English
Digital
Yes
Manuscript
No
Library
Özyeğin University
Library Asset ID
1537-6494
Record ID
9708b591-5c89-40b7-b964-f6a66c70211b
Library Location
Mechanical Engineering
Date
2020-03-16
Sample Text
The importance of ratchetting-fatigue interaction is garnering interest due to complex failure mechanism of rail welds under cyclic loading. The objective of this paper is to investigate the fatigue characteristics of continuous welded rails (CWRs) and the effect of residual stress on fatigue-ratchetting interaction. For this purpose, UIC60 rails have been modeled using a three-dimensional finite element model, including a combination of nonlinear kinematic and isotropic hardening. In addition, the interaction between cyclic loading and the effect of residual stress on fatigue is taken into consideration. Finite element model is validated against representative experimental findings. Smith-Watson-Topper (SWT) method is utilized in order to estimate the fatigue life of rail welds under static and cyclic loading. Lower fatigue life is predicted with increasing load due to the contact between rails and wheels. Simulation results also show that failure in the form of ratchetting occurs during the 10,236th cycle, while failure corresponds to the 15,290th cycle and the 145,161st cycle based on the SWT and Coffin-Manson fatigue models, respectively. These findings suggest that investigations on ratchetting and fatigue should be carried out simultaneously to estimate the failure of the CWRs.
DOI
10.1080/15376494.2018.1480820
Cilt
27
