Quantification of sub-surface railhead material damage due to composite endpost materials of insulated rail joints for cyclic wheel loadings

Mandal, Nirmal Kumar; Lewis, Roger; Wen, Zefeng

doi:10.1016/j.engfailanal.2020.104562

Cited by 6 publications

(2 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In order to study the prominent characteristics of various insulating interlayer materials on the track vibration, commonly used insulating materials were selected, like plastic (materials actually applied on site), nylon and fiberglass. 29,30 Therefore, the present section mainly focusses on the influence of these three materials on the rail vibration. The elastic modulus of PTFE(plastic), nylon, fiberglass were 400 MPa, 1590 MPa, and 45,000 MPa, the Poisson’s Ratio of the three materials were 0.46, 0.39, and 0.19.…”

Section: Results Analysismentioning

confidence: 99%

Field testing and performance optimization of a weld reinforcement device in heavy haul railways

Liu

Xiao

Shi

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part F:

View full text Add to dashboard Cite

The Bowed plates weld device (BPWD) is a new type of rail weld reinforcement device, which has been widely applied in heavy haul railway lines in China. It changes the service state and vibration characteristics of a weld. In order to explore the BPWD vibration influence on the track, static, and dynamic on-site tests were carried out on a heavy haul line. The vibration influence and spectrum characteristics of the track between BPWD and unplated weld (UW) was compared. At the same time, a 3D coupling model of heavy haul train-rail weld was established and optimization of service performance of the BPWD was carried out. The results showed that the average acceleration of rail, sleeper and ballast at the BPWDwere 52.7%, 43.5%, and 50.2% lower than that of UW. In comparison with UW, peak value of the periodic frequency spectrum and dominant frequency distribution in the BPWD track structure could be effectively reduced from rails to ballast. Length of 0.8 m for plate was found to be optimum in order to reduce the rail stress effectively. The material of the insulating interlayer should preferably be nylon.

show abstract

Section: Results Analysismentioning

confidence: 99%

Field testing and performance optimization of a weld reinforcement device in heavy haul railways

Liu

Xiao

Shi

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part F:

View full text Add to dashboard Cite

show abstract

“…Sandström and Ekberg implemented an FE model for IRJs wheel-rail and wheel-endpost contact considering traction forces and compared the simulated contact stresses with Hertz predictions [4]. Mandal carried out systematic studies on ratcheting failure of IRJs subject to cyclic wheel loadings, with detailed contact stress distribution visualised through sub-modelling and FE simulations [5][6][7][8]. Numerical simulations have also been adopted by Yang et al to study the influence of wheel rail impact at IRJs [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Insulated rail joint (IRJ) contact characterisation-an ultrasonic reflectometry approach for a cross-material interface

Zhou

Luo

Lewis

2023

Smart Mater. Struct.

Self Cite

View full text Add to dashboard Cite

Vehicle-track interaction at insulated rail joints (IRJs) plays a significant role in the wear evolvement and damage of the IRJ components. It is, however, challenging to characterise the contact conditions within the region non-destructively and accurately using experimental tools, especially when the IRJ contact involves both wheel-rail and wheel-endpost contact pairs. This study presents an ultrasonic technique to monitor and characterise static IRJ contacts in a non-invasive manner. The proposed ultrasonic reflectometry technique can realise high-resolution visualisation of contact patch and contact pressure distribution for both wheel-rail contact and wheel-endpost contact, by striking a beam of focused ultrasonic signals at the contact interface. Different data post-processing strategies are applied for the two types of contacts and a deconvolution algorithm is applied to rectify the measurements near the railendpost boundary. The ultrasonic measurements are verified through FE simulations and the results show good agreement with each other in terms of both contact area and contact pressure level. It is expected that the proposed ultrasonic approach can be a reliable tool to assist in revealing the contact behaviour of IRJs more profoundly.

show abstract

Field test and numerical analysis of Insulated rail joints in heavy-haul railway

Xiao

Liu

Yan

et al. 2021

Construction and Building Materials

View full text Add to dashboard Cite

Quantification of sub-surface railhead material damage due to composite endpost materials of insulated rail joints for cyclic wheel loadings

Cited by 6 publications

References 21 publications

Field testing and performance optimization of a weld reinforcement device in heavy haul railways

Field testing and performance optimization of a weld reinforcement device in heavy haul railways

Insulated rail joint (IRJ) contact characterisation-an ultrasonic reflectometry approach for a cross-material interface

Field test and numerical analysis of Insulated rail joints in heavy-haul railway

Contact Info

Product

Resources

About