Stress concentration of transition groove induced by a press-fitted part in railway axles

Yamamoto, Masataka; Ishiduka, Hiromichi

doi:10.1016/j.ijfatigue.2016.12.025

Cited by 23 publications

(6 citation statements)

References 11 publications

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“…The crack from the transition altered the local stress field (see Figure 7) despite of no press fits and external loading. Such local stress relaxation or stress concentration indicates the probable crack propagation subjected to real load spectrum and geometrical constraints from press-fitted wheel and gear [13,24]. Furthermore, a pronounced influence of surface hardened layer happens on the crack front located in the axle surface.…”

Section: Element Setsmentioning

confidence: 99%

“…It is therefore concluded that the aspect ratio is to be 0.4~0.7 usually for axles without surface residual stress [10]. However for those Shinkansen hollow axles or European deep rolled high-speed axles, compressive stress near the axle surface provides an increasing fatigue cracking resistance [1,4,13,14]. Such feature leads to retardation of crack growth locally at the axle surface and opposite acceleration at the radial direction.…”

Section: The Wheelsets Geometrymentioning

confidence: 99%

“…Together with complex rotating bending loads, the geometrical transition becomes a critical position for an axle with large diameter ratio. To assure the perfect attachment of the wheel set (see Figure 8), three types of optimal selections including the master-slave contact pair, the radial interference v and the friction coefficient μ are necessary for a precise assessment of the SIF solutions [13,24]. The master surfaces were suggested as inner surfaces of the gear and wheel due to the larger stiffness, while the slave surfaces were the outer surface of the axle.…”

Section: Contact Analysis Settingmentioning

confidence: 99%

“…Improving the fatigue crack resistance of the involved material can fundamentally help to lengthen the total service lifetime. To increase the fatigue strength of press-fitted regions, induction hardening has been successfully developed by high-level compressive stress at the surface of Shinkansen axles [1,13]. Because of a huge advantage of surface hardening [14,15], it is thus strongly expected that European and Chinese axles adopt the induction hardening to achieve the higher durability and reliability in near future.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

On the residual life assessment of high-speed railway axles due to induction hardening

Liu

et al. 2018

International Journal of Rail Transportation

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Surface hardening treatment can significantly increase the hardness of axle surface and introduce negative residual stress field into the axle. This work proposed an integrated stress rebuilding strategy of unit pressure and proportional integral approach to conduct the residual life prediction of an induction hardened axles and a load spectrum. A large crack aspect ratio a/c = 0.9 at the transition was used to predict the residual lifetime. It is well found that the hardened layer can provide a considerable fatigue resistance. Moreover, the critical stress region transfers to the inside of the axle or beneath the hardening layer rather than the free surface. Due to compressive residual stress, the evolved crack shape of hardened axles is completely different from original axles, showing a large aspect ratio. Totally, surface strengthened axles can acquire a prospective extended residual life. ARTICLE HISTORY

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Section: Element Setsmentioning

confidence: 99%

Section: The Wheelsets Geometrymentioning

confidence: 99%

Section: Contact Analysis Settingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

On the residual life assessment of high-speed railway axles due to induction hardening

Liu

et al. 2018

International Journal of Rail Transportation

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“…In this paper, a three-dimensional finite element model of critical refraction longitudinal wave for detecting rail temperature force was built with the finite element software ANSYS, as shown in Figure 4. The parameter settings of the 3D finite element model [33][34][35] are shown in Table 3. When the ambient temperature entered the steel rail through heat transfer, the non-uniformly distributed temperature field and thermal stress state were generated.…”

Section: Finite Element Modelmentioning

confidence: 99%

A method for long-term on-line monitoring of temperature stress of continuously welded rail

Sun

Zhu

et al. 2021

Advances in Mechanical Engineering

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Continuously welded rail (CWR) has been widely applied in modern railway structures, and its performance is directly related to the safety of railway transportation. After the removal of the rail joints, the CWR cannot expand and contract freely. The longitudinal temperature stress within the CWR turns out to be the core structural parameter in the maintenance and repair of the track. In this study, an ultrasonic theoretical model of the rail temperature force was established, and the mechanism of the critical refracted longitudinal wave to detect the rail temperature stress was analyzed. A numerical simulation calculation was conducted with the three-dimensional finite element model, and the longitudinal wave incidence angle, frequency, and transducer spacing were calculated. The impact of critical factors on the accuracy of refracted longitudinal wave detection temperature stress was investigated. The ultrasonic acoustic propagation under the corresponding stress value of the rail was calibrated to eliminate the influence of residual stress and ensure the accuracy of ultrasonic detection of temperature stress. Finally, an online rail temperature stress monitoring system was built, and a long-term operation was carried out in the Changzhou section of the Shanghai-Nanjing high-speed rail. The monitoring data of the line in 2019 was obtained, and the temperature stress change of the line was recorded. The data showed that the ultrasonic sound obtained by real-time monitoring could accurately reflect the temperature and force changes of the rail. This proposed method is expected to provide a solution for online and remote acquisition of the temperature stress of the CWR. The accumulated long-term monitoring data is of great significance to the prevention plan for rail expansion and rail breakage.

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Multiaxial stress mapping and fatigue failure prediction of aircraft hydraulic pipes

Mehmood

Hameed

Safdar

et al. 2021

Engineering Failure Analysis

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Stress concentration of transition groove induced by a press-fitted part in railway axles

Cited by 23 publications

References 11 publications

On the residual life assessment of high-speed railway axles due to induction hardening

On the residual life assessment of high-speed railway axles due to induction hardening

A method for long-term on-line monitoring of temperature stress of continuously welded rail

Multiaxial stress mapping and fatigue failure prediction of aircraft hydraulic pipes

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