Fatigue crack initiation life prediction of railroad

Tehrani, Parisa Hosseini; Saket, M

doi:10.1088/1742-6596/181/1/012038

Cited by 7 publications

(4 citation statements)

References 17 publications

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“…Hossein Tehrani and Saket [44] studied the fatigue crack initiation life of railroad wheels but effects of thermal and mechanical loads of braking were ignored and rolling of wheel was not modeled.…”

Section: Discussionmentioning

confidence: 99%

Review on the Fatigue Behavior of the Wheels of Railway Vehicles in Contact With Rail

Toth

Macuta

2020

MTD

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Rail transport is essential to the EU's strategy for a more sustainable transport sector, economic and social cohesion and connecting Europeans at and between each Member State. EU trend is to support the railway sector as a clean, main mode of transport at European level. The European rail system carries around 1.6 billion tones of freight and 9 billion passengers each year. The railway sector has a substantial contribution to the EU economy, directly employing over 1 million people. With the technological evolution of railway vehicles, it is important to focus on safety issues. Wheels are one of the most critical components of railway vehicles, as their failure can lead to derailment. Therefore, an exact project on the control of the problem of wheel fatigue and knowledge of the effective parameters on their life, can improve the life of the whole structure. Due to the fact that the nature of the loads applied to the wheels is repeated, fatigue is very common mechanism of damage that can occur in several ways, such as: nucleation and growth of fatigue cracks, spalling, shelling, and so forth. The main sources of these phenomena are the rolling contact loads, the thermal loads between the wheel-rail and the wheel-brake block, created in the braking phase, the presence of structural defects in the wheel material; it follows that they cannot be omitted in a rigorous design. Increasing of speed aggravates these factors and exacerbates the problem of thermal fatigue of the wheels. In this paper we present a series of studies that focused on the wear of the wheels of railway vehicles in contact with the steering track (rail) to fatigue.

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Section: Discussionmentioning

confidence: 99%

Review on the Fatigue Behavior of the Wheels of Railway Vehicles in Contact With Rail

Toth

Macuta

2020

MTD

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“…This process removes plastically deformed material on the railhead, which causes step marking known as slip bands. Accumulation of slip bands on the rail causes small cracks; thus, the rail reprofiling and grinding process reduce the possibility of crack initiation (Tehrani and Saket, 2009;Sangid, 2013). Nevertheless, for deeply developed cracks, the rail reprofiling and grinding processes are expensive and timeconsuming, and as a result the railhead becomes thin, thus, the methods become inadequate.…”

Section: Rolling Contact Fatigue Implications and Maintenance Strategiesmentioning

confidence: 99%

“…Similarly, the study conducted by (Tehrani and Saket, 2009) follow the elastic-plastic FE method. Their study objective was to predict the fatigue life initiation due to high-cycle load.…”

Section: Previous Studies On Wheel-rail Interactionsmentioning

confidence: 99%

Crack influence and fatigue life assessment in rail profiles: a numerical study

Urassa,

Habte,

Mohammedseid

2023

Front. Built Environ.

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Rail transportation is a pivotal mode of land transport for its efficiency in transporting passengers and freight across short or long distances; hence, the reliability and safety of rail systems are of key importance. Rolling contact fatigue (RCF), characterized by the cyclic loading of wheel-rail contacts, presents a significant challenge in the rail industry. This study presents a comprehensive numerical investigation on the influence of different crack orientations on the contact stress of the rail profile and subsequently the fatigue life. Using finite element analysis (FEA) with Abaqus and FE-safe software, the study examined different crack orientations’ impact on stress distribution and fatigue life of rail profiles. Employing the extended finite element method (XFEM), this study modeled cracks in rail profiles with different orientations: parallel, perpendicular, and oblique to the rail axis. finite element analysis was used to obtain stress distribution results, highlighting the impact of crack presence, and orientation on maximum contact stresses. Subsequently, fatigue analysis was performed using FE-safe software, wherein the FEA results were imported to estimate fatigue life and damage evolution. The study revealed that the presence of a crack significantly influences contact stress, fatigue life, and damage accumulation. The results further demonstrated that crack orientation has an impact on the severity of those effects. Oblique cracks exhibited higher impact compared to lateral and longitudinal cracks. The study provides valuable insights into rolling contact fatigue-related failures, aiding in better understanding and mitigation of such issues, thereby contributing to improved rail maintenance practices and system safety.

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“…Dünyada demiryolu sistemlerindeki son gelişmeler, işletmedeki verimliliğin yanısıra güvenlik ve güvenilirliğin arttığı, ilk maliyetlerin ve işletme maliyetlerinin azaldığı yenilikçi tasarımların gerekliliğini ve önemini ortaya koymaktadır. Diğer altsistemlerin yanısıra tekerlek ray etkileşimi, temas yüzeyinin küçük bir alanda meydana gelmesi, güvenliği, konforu ve sağlamlığı etkileyen temel etkenlerden birisidir [1]. Artan hız, aks yükleri ve işletme frekanslarına bağlı olarak özellikle tekerlek ve ray temas yüzeylerinde hasarlar daha sıklıkla meydana gelmektedir.…”

Section: Introductionunclassified

Wheel Rail Interaction and a Finite Element Analysis on Fatigue Failure Resistance of Pearlitic and Bainitic Steels

Sarikavak

2021

Demiryolu Mühendisliği

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Öz: Bu çalışmada ülkemizde ve dünyada demiryolu hatlarında işletme şartlarında çoğunlukla kullanımda olan perlitik mikroyapıdaki çelikler ve perlitik çeliklere alternatif olarak sunulan, gelişmiş mekanik özelliklere sahip olan beynitik mikroyapıdaki çelikler ele alınmıştır. Geniş bir literatür özetiyle konvansiyonel ray sınıfları ve gelişmiş ray sınıfları, kimyasal kompozisyonları ve temel mekanik özellikleri dikkate alınarak değerlendirilmiştir. Ayrıca dünyada farklı bölge ve ülkelerde geliştirilen beynitik ray çelikleri incelenmiştir. Daha sonra tekerlek ray etkileşimi, sürtünme şartları ve temas yüzeyleri dikkate alınarak, geliştirilen sonlu elemanlar modelinde rayın yorulma hasar direnci analiz edilmiştir. Sonuç olarak analiz edilen beynitik mikroyapıdaki çeliğin yorulma hasar direncinin perlitik mikroyapıya göre üstün olduğu ve 386,69 MPa yük altında on milyon çevrime dayanabildiği anlaşılmıştır.

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Fatigue crack initiation life prediction of railroad

Cited by 7 publications

References 17 publications

Review on the Fatigue Behavior of the Wheels of Railway Vehicles in Contact With Rail

Review on the Fatigue Behavior of the Wheels of Railway Vehicles in Contact With Rail

Crack influence and fatigue life assessment in rail profiles: a numerical study

Wheel Rail Interaction and a Finite Element Analysis on Fatigue Failure Resistance of Pearlitic and Bainitic Steels

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