Fatigue characteristics of continuous welded rails and the effect of residual stress on fatigue-ratchetting interaction

Name: Fatigue characteristics of continuous welded rails and the effect of residual stress on fatigue-ratchetting interaction
Author: Mansouri, Deniz, Şendur, Polat, Yapıcı, Güney Güven

İsim	Fatigue characteristics of continuous welded rails and the effect of residual stress on fatigue-ratchetting interaction
Yazar	Mansouri, Deniz, Şendur, Polat, Yapıcı, Güney Güven
Basım Tarihi:	2020-03-16
Basım Yeri	- Taylor & Francis
Konu	Fatigue, Ratchetting, Continuous welded rails, Hardening, Plastic strain
Tür	Süreli Yayın
Dil	İngilizce
Dijital	Evet
Yazma	Hayır
Kütüphane:	Özyeğin Üniversitesi
Demirbaş Numarası	1537-6494
Kayıt Numarası	9708b591-5c89-40b7-b964-f6a66c70211b
Lokasyon	Mechanical Engineering
Tarih	2020-03-16
Örnek Metin	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

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Fatigue characteristics of continuous welded rails and the effect of residual stress on fatigue-ratchetting interaction

Yazar Mansouri, Deniz, Şendur, Polat, Yapıcı, Güney Güven

Basım Tarihi 2020-03-16

Basım Yeri - Taylor & Francis

Konu Fatigue, Ratchetting, Continuous welded rails, Hardening, Plastic strain

Tür Süreli Yayın

Dil İngilizce

Dijital Evet

Yazma Hayır

Kütüphane Özyeğin Üniversitesi

Demirbaş Numarası 1537-6494

Kayıt Numarası 9708b591-5c89-40b7-b964-f6a66c70211b

Lokasyon Mechanical Engineering

Tarih 2020-03-16

Örnek Metin 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