Prediction of fatigue crack initiation life in railheads using finite element analysis

El–sayed, H.M.; Lotfy, Mohamed; Zohny, Haytham N.; Riad, H.S.

doi:10.1016/j.asej.2017.06.003

Cited by 41 publications

(29 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Note that the element size of the mesh has a basic role in the deference of the deflection values between the Zimmermann method and FE model. Ma et al [37], El-sayed et al [38], and Boussalia and Bellaouar [39] concluded that by decreasing the element size, the accuracy increased, but the computational time also increased. El-sayed et al [38] and Prakoso [32] verified their numerical models, by using ABAQUS and ANSYS software programs, with the Zimmermann method.…”

Section: Zimmermann Methods Verificationmentioning

confidence: 99%

“…Ma et al [37], El-sayed et al [38], and Boussalia and Bellaouar [39] concluded that by decreasing the element size, the accuracy increased, but the computational time also increased. El-sayed et al [38] and Prakoso [32] verified their numerical models, by using ABAQUS and ANSYS software programs, with the Zimmermann method. It was found that the difference between El-sayed et al [38] and the Zimmermann method was 0.82%, and the difference between Prakoso [32] and the Zimmermann method was about 0.3%.…”

Section: Zimmermann Methods Verificationmentioning

confidence: 99%

See 1 more Smart Citation

Numerical Analysis of Additional Stresses in Railway Track Elements Due to Subgrade Settlement Using FEM Simulation

et al. 2021

View full text Add to dashboard Cite

The prediction of additional stresses in ballasted track due to subgrade deformation is the main objective of the present paper. In this context, a 2D finite element model of ballasted railway track was built using the ANSYS Workbench program. Based on this model, an investigation of stresses and deformation values of track elements was conducted in three cases with different contact types. It was found that the case introducing the status of a new track, which has frictional contacts between sleepers and ballast with bonded contacts between other elements, has lower stresses in most of the track elements. Moreover, this case was applied for studying the effect of the settlement on track elements. It was found that stresses increased with increasing the settlement value. The average percentages of increased stresses are 4.18%, 5.85%, and 7.21% in railhead, tie plate, and sleeper, respectively, due to a 1 mm increase in the settlement. Finally, a second-degree polynomial equation was derived to predict the additional stresses in each element due to track settlement. It is expected that this study would help to decrease the maintenance costs and extend the service life of the track elements by predicting the additional stresses in them.

show abstract

Section: Zimmermann Methods Verificationmentioning

confidence: 99%

Section: Zimmermann Methods Verificationmentioning

confidence: 99%

Numerical Analysis of Additional Stresses in Railway Track Elements Due to Subgrade Settlement Using FEM Simulation

et al. 2021

View full text Add to dashboard Cite

show abstract

“…The theoretical studies are usually based on the analytic Hertzian solution [12], semi-analytic FASTSIM algorithm [13,14] and the finite element (FEM) simulations. The FEM simulation of stresses in the wheel rail interaction system is presented in studies [15][16][17]. An approach for determining a critical size for RCF (Rail Contact Fatigue) initiation from rail surface defects is presented in [18].…”

Section: Figure 1 Representation Of a Rail Head Defect [8]mentioning

confidence: 99%

Extending service life of rails in the case of a rail head defect

Ovchinnikov¹,

Bondarenko²,

Kou³

et al. 2021

JCE

View full text Add to dashboard Cite

Rails are subjected to the processes of wear, corrosion and contact and bending fatigue during their lifecycle. As a result of these processes, various types of damage and defects are formed in rails. The residual life of rails depends on the size, position, and orientation of defects. Maximum permissible crack-size values are calculated in this paper using the finite element method. The crack plane orientation relative to the contact surface plane is analysed. The dependence of the stress intensity factor on the crack area is established. This allows continued use of defective rails and safe operation on low-activity railways.

show abstract

“…e results show that the effect of notch angles on crack propagation increased with notch depth. El-sayed et al [16] introduced a threedimensional explicit FEM combined with the critical plane approach and multiaxial low cyclic fatigue mode to predict crack orientation and fatigue crack extension. Xue [17] employed FEM to analyze the crack growth mechanisms in the process of zirconia ceramics cutting, which was used for optimization design of process parameters.…”

Section: Introductionmentioning

confidence: 99%

Fatigue Life Prediction of the Zirconia Fixture Based on Boundary Element Method

Wang

et al. 2020

Shock and Vibration

View full text Add to dashboard Cite

Zirconia grinding fixtures have been widely used in semiconductor industry to improve the quality and precision of the products. For maximizing the service life and minimizing the risks of accidental damage, it is critical to have a better understanding of the fatigue life of zirconia grinding fixtures. To this end, a boundary element method is developed in this paper to investigate their crack growth and fatigue life. To validate the proposed method, the stress intensity factor of a typical plate structure with initial cracks is considered. On this basis, Paris Law is employed in the boundary element model to further study the crack growth and stress distributions in the zirconia fixture under cyclic loads. Numerical results show that stress concentration occurs at the pillar of the fixture, and crack growth is perpendicular to the loading direction.

show abstract

Prediction of fatigue crack initiation life in railheads using finite element analysis

Cited by 41 publications

References 26 publications

Numerical Analysis of Additional Stresses in Railway Track Elements Due to Subgrade Settlement Using FEM Simulation

Numerical Analysis of Additional Stresses in Railway Track Elements Due to Subgrade Settlement Using FEM Simulation

Extending service life of rails in the case of a rail head defect

Fatigue Life Prediction of the Zirconia Fixture Based on Boundary Element Method

Contact Info

Product

Resources

About