Influence of malposition on the performance of elastic rail clip: Toe load, stress, and friction

Hasap, Anat; Noraphaiphipaksa, Nitikorn; Kanchanomai, Chaosuan

doi:10.1016/j.istruc.2020.10.073

Cited by 6 publications

(7 citation statements)

References 10 publications

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“…The strain and stress of rail clips under static loading have been studied by Ferreño et al 11 and Hasap et al 12 who only used FEA. Although they employed the test results obtained from conventional measurement tools, involving the use of strain gauges to validate the FEA, the actual location, and magnitude of the maximum strain and stress of the rail clips could not be accurately detected because of the complex geometry of measuring tools and curved surfaces of rail clips.…”

Section: Resultsmentioning

confidence: 99%

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Failure analysis and fatigue life prediction of high-speed rail clips based on DIC technique

Liu

Jiang

et al. 2021

Advances in Mechanical Engineering

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With the development of rail transportation, the fatigue failure of rail clips has become an issue, which affects the operational safety of trains. In this study, reasons for the fatigue failure of rail clips were investigated to improve their service life. A digital image correlation (DIC) technique was conducted to obtain strain fields, vibration modes, and natural frequencies of a rail clip. The strain and displacement of a rail clip under dynamic cyclic loading were also obtained. A fastener system refinement model was developed to analyze the static, dynamic, and modal responses of the clip. The experimental tests and modal simulation results were mutually verified. The fatigue life was analyzed based on the verified FE model. The results revealed that the maximum strain and minimum fatigue life occur at the heel of the clip, in good agreement with the actual fracture position. As the amplitude and frequency of dynamic cyclic load increased, the fatigue life of the clip decreased sharply. Moreover, the normal wheel–rail force accompanied by high-frequency rail corrugations accelerated crack initiation and reduced the fatigue life. The findings of this study provide guidance for improving the service life of rail clips.

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Section: Resultsmentioning

confidence: 99%

“…However, the load applied in their study was too simple. Hasap et al 12 evaluated the influences of clip’s malposition on the toe load, stress, and friction. The toe load of e-clips increased with the increase in malposition, and the stress was slightly affected by malposition.…”

Section: Introductionmentioning

confidence: 99%

Failure analysis and fatigue life prediction of high-speed rail clips based on DIC technique

Liu

Jiang

et al. 2021

Advances in Mechanical Engineering

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“…The impact of train-induced vibration in adjacent buildings is affected by many factors, not only from the track [ 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 ] but also from the geological condition [ 20 , 21 , 22 , 23 ] and the structure itself [ 27 , 31 , 32 ]. Therefore, the ground vibration measurement results are not enough to assess the expected vibration acceleration level in the theater.…”

Section: Measurements and Analysis In The Theater Construction Sitementioning

confidence: 99%

“…Besides the variation of track structures, the track condition is also an important influencing factor that cannot be ignored. The impact factors include but are not limited to the change of wheel and rail profiles due to wear and maintenance [ 16 ], the temperature force in the rail [ 17 ], different types of track irregularities [ 18 ] and installation quality of fastening clips [ 19 ], etc. Regarding the propagation path of the vibration, which is mainly the surrounding rock and soil of the railway foundation, the physical properties [ 20 , 21 ] as well as distribution of soil and rock layers [ 20 , 22 ] are considered as influential factors that may contribute to the attenuation of vibration.…”

Section: Introductionmentioning

confidence: 99%

Analogical Assessment of Train-Induced Vibration and Radiated Noise in a Proposed Theater

Liu

Xiao

Jiang

et al. 2023

Sensors

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This study presents the analogical assessment of the train-induced vibration and radiated noise in a proposed theater. The theater is to be constructed in a region with crowded metro lines, and the assessment is implemented in an analogical building with comparable structural type and metro condition. Prior to the assessment, the comparability of the analogical building with the theater is validated using the train-induced ground vibration. With the same horizontal distance from the metro line, the train-induced vibration level in the analogical building is 9 dB higher than that in the construction site of the theater. Such results indicate that the lack of soil layers may lead to a dramatic increase in train-induced vibration in the building. In the staircase of the analogical building, the train-induced radiated noise reached 55 dB (A), which is 10 dB (A) higher than the daytime allowable level. As the most important indicator, the noise rating number in the cinema of the analogical building is NR-43, which put forward an enormous challenge on the construction of the theater with a denoise demand of 23 dB. The analogical method applied in this study provides an effective and practical way for the assessment of train-induced vibration and radiated noise in proposed vibration-sensitive buildings. The assessment results that provide necessary reference and support for the anti-vibration design will help guarantee the stage effect of the theater.

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“…Due to the elasticity of the fastening system, rail tilting is possible only to a limited extent. In this process, the contact point of the clip and rail foot is lowered or raised and depending on the vertical displacement of the contact point, the fastening force, deformations, and stresses of the individual parts of the clip change [43]. This change in the fastening force, stresses, and deformations depends on the magnitude and position of the axle load on the rail head and the gauge side of the rail on which the clip is located (the inner or outer gauge side) [43,44].…”

Section: Resistance Of the Fastening System To Rail Tiltingmentioning

confidence: 99%

Development of a new and modification of existing elastic clips for rails fastening

Lakušić¹

2022

JCE

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One of the problems of railway fastening systems (fastening system) that occurs due to the development of railways is the damage of the elastic clips, which leads to the loss of structural integrity between the rail and the base. Therefore, there is a need to develop new clips or improve existing ones. The paper describes the contribution and role of each component of the fastening system in different loading cases. As a tool whose parameters can affect the efficiency of the fastening system, special attention is given to the clips. Finally, an example is briefly described for creating numerical models that can be used to perform parametric analyses in order to develop new clips or improve existing ones.

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Influence of malposition on the performance of elastic rail clip: Toe load, stress, and friction

Cited by 6 publications

References 10 publications

Failure analysis and fatigue life prediction of high-speed rail clips based on DIC technique

Failure analysis and fatigue life prediction of high-speed rail clips based on DIC technique

Analogical Assessment of Train-Induced Vibration and Radiated Noise in a Proposed Theater

Development of a new and modification of existing elastic clips for rails fastening

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