Fracture and fatigue crack growth analyses on a weld-repaired railway rail

Jun, Hyun-Kyu; Seo, Jung Won; Jeon, Il-Sik; Lee, Sang-Hwan; Chang, Yoon‐Suk

doi:10.1016/j.engfailanal.2015.11.014

Cited by 58 publications

(32 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Eight‐node linear elements (DC3D8 for heat transfer analysis and C3D8R for thermal stress analysis) in ABAQUS element library were used. Details of the heat transfer analysis process can be obtained from a previously published paper …”

Section: Finite Element Modellingmentioning

confidence: 99%

“…In a previous research, the authors predicted fatigue life of welded rails under rolling contact fatigue in which the residual stress was determined from only simulation and defined as tensile. Also, causes of failure as well as fatigue crack growth were examined based on microstructural and chemical assessment, hardness test and residual stress measurement for used rails, and compressive residual stress was observed …”

Section: Introductionmentioning

confidence: 99%

“…also utilized ABAQUS with user subroutines: UEXPAN , DFLUX , HETVAL and the third‐party software application DANTE to model the thermal process. The authors previously presented the fracture analysis results of damaged rail weld repair and the effect of residual stress on the fatigue life due to crack propagation by using ABAQUS and in‐house crack propagation simulation code . In this study, both experimental and numerical approaches were used to obtain accurate residual stress distributions in a repair‐welded rail head.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Investigation of residual stresses in a repair‐welded rail head considering solid‐state phase transformation

Jun

Jeon

et al. 2016

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

Repair welding for recovery from local damage of a rail head surface is known to cause high residual stress and can accelerate fatigue in the rail. This study examines repair‐welded rails by applying experimental and numerical approaches. In the former approach, two newly manufactured rail specimens and four repair‐welded rail specimens with two different weld depths were prepared, and their residual stresses were measured with a sectioning method. In the latter approach, a finite element repair welding simulation model was developed that adopted a prescribed temperature method with a moving block as an input heat source, and the thermal strain caused by the volume change due to solid‐state phase transformation was considered. Overall, the residual stresses correlated well between the experimental and numerical approaches. The measured high compressive residual stress of −290 MPa seems to be beneficial to prevent a crack initiation in the rail surface.

show abstract

Section: Finite Element Modellingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Investigation of residual stresses in a repair‐welded rail head considering solid‐state phase transformation

Jun

Jeon

et al. 2016

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

show abstract

“…In recent years, fatigue failures of welded structures such as bucket wheels, railway rails and lifting platforms have been noticeably arising [21,22,23]. Basically, tensile residual stresses are known to have detrimental effects on decreasing fatigue life of welded structures [24,25].…”

Section: Introductionmentioning

confidence: 99%

Fatigue Crack Growth Behavior of the MIG Welded Joint of 06Cr19Ni10 Stainless Steel

et al. 2018

View full text Add to dashboard Cite

In this paper, the fatigue crack growth behavior of the base metal (BM), the weld metal (WM) and the heat-affected zone (HAZ) in the metal-inert gas (MIG) welded joints of the 06Cr19Ni10 stainless steel are analyzed and studied. Results of the fatigue crack propagation tests show that a new fatigue crack initiates at the crack tip of a pre-existing crack, then propagates perpendicular to the direction of cyclic fatigue loads. This observation indicates that the original mixed-mode crack transforms into the mode I crack. The WM specimen has the largest fatigue crack growth rate, followed by the HAZ specimen and the BM specimen. To illustrate the differences in fatigue crack growth behavior of the three different types of specimens, metallographic structure, fracture morphology and residual stresses of the BM, HAZ and WM are investigated and discussed. The metallographic observations indicate that the mean grain size of the HAZ is relatively larger than that of the BM. The fractographic analysis shows that the WM has the largest fatigue striation width, followed by the HAZ and the BM. It is also found that the depth of dimple in the WM is relatively shallower than the one in the HAZ and BM, implying the poor plasticity behavior of the material. Analysis results of the residual stress analysis demonstrate a high level of tensile residual stress appearance in the WM and HAZ.

show abstract

“…Numerous studies has been done in the past to investigate the effect of inclusions in rails [5]- [10]. If inclusions remain in the rail, they may establish a favoured region of stress concentration.…”

Section: Introductionmentioning

confidence: 99%

The effect of white etching layer patches on a larger rail defect

Sanusi

Fletcher

2017

MATEC Web Conf.

View full text Add to dashboard Cite

Abstract. Manufacturing defects such as porosity that formed in the rail could result in catastrophic failure if it remain in service. In this study, a crack that initiated from a large void was modelled using boundary element model to investigate the effect of white etching layer patches on larger defects in rail. The configuration studied represents a large defect in the rail that was observed from a rail removed from service. These investigation has provided a better understanding of how a crack initiated from a larger defect grows under the effect of white etching layer. The results highlight that a continuous white etching layer region will dominates the growth of the crack compared to a patches white etching layer region for a smaller crack size while patches of white etching layer will accelerates the crack growth for a larger crack size. The crack growth predicted in this study for a small crack size is at least 6 times higher than the wear rate mentioned in the literature and will increase further if the expansion of a transformed layer is considered making it impossible to be removed by natural wear.

show abstract

Fracture and fatigue crack growth analyses on a weld-repaired railway rail

Cited by 58 publications

References 15 publications

Investigation of residual stresses in a repair‐welded rail head considering solid‐state phase transformation

Investigation of residual stresses in a repair‐welded rail head considering solid‐state phase transformation

Fatigue Crack Growth Behavior of the MIG Welded Joint of 06Cr19Ni10 Stainless Steel

The effect of white etching layer patches on a larger rail defect

Contact Info

Product

Resources

About