Railway Axle and Wheel Assembly Press-Fitting Force Characteristics and Holding Torque Capacity

Nwe, Theingi; Pimsarn, Monsak

doi:10.3390/app11198862

Cited by 6 publications

(4 citation statements)

References 10 publications

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“…The outboard wheelsets used have great design freedom with a large space envelope to distribute the moment through the axle that needs more attention in the design of interference. The design philosophy is based on Lame's solution for the thick-walled cylinders taking a state of plane stress both in the axle and in the wheel [27]. The calculation of pressure for the design can depend on the inner and outer diameter of the wheel and axle, and the interference size, which can change the value the most.…”

Section: Theoretical Analysis Of Press-fitted Jointsmentioning

confidence: 99%

Effect of Interference Size on Contact Pressure Distribution of Railway Wheel Axle Press Fitting

Irena,

Lemu,

Kedir

2023

Designs

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Mechanical couplings in engineering usually use interference fits to connect the shaft and hub. A railway wheel axle is a press fit that is connected by interference and can be subjected to bending stress. In loaded press fits, a high concentration of contact stresses can be generated in the area of the axle-fillet beam, which in most cases leads to the failure of the axle due to fatigue and fretting fatigues. Therefore, it is crucial to determine the ability of the press-fitted joints to provide sufficient frictional resistance that can withstand the loads and torques by evaluating the safety factor, especially when the mechanical or structural system is loaded. In this paper, the contact pressure and stress distribution along the radius of the wheel axle are studied using the analytical calculation of Lame’s equation, and the numerical method used is by ANSYS software. It was found that interference fits have a great influence on the connection strength of interference fits, which are directly related to the contact pressure. Increasing the interference increases the contact pressure, which allows higher torque and load capacity to be transmitted. The finite element analysis showed good agreement for the highest interference value of 230 µm with a relative error of 1.4%, while this error increased to the maximum relative error of 14.33% for a minimum interference of 100 µm.

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Section: Theoretical Analysis Of Press-fitted Jointsmentioning

confidence: 99%

Effect of Interference Size on Contact Pressure Distribution of Railway Wheel Axle Press Fitting

Irena,

Lemu,

Kedir

2023

Designs

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“…j , W (j) j , and s (j) j by equations ( 7), ( 9), ( 16), ( 18), (21), and (22); 6. Store calculation data: W(i, j)=W (j) 1 or W (j) j , s(j, :, i)= s (j) 1 or s (j) j ; 7.…”

Section: Automatic Generation Of Assembly Matrixmentioning

confidence: 99%

“…Therefore, the quality assessment method based on the press-fit curve has received extensive attention, and it has been applied to the quality assessment of armature assemblies 20 and railway axle-wheel. 4,6,21 However, the press-fit curves in the above studies are all obtained based on TCT, ignoring the resistant force generated by the non-contact regions. To improve the analysis accuracy, Wang et al 22,23 introduced the resistant force into the TCT and achieved accurate prediction of the press-fit curve and contact stress distribution of the armature assembly.…”

Section: Introductionmentioning

confidence: 99%

Press-fit analysis of multilayer interference fit

Wang

Zhang

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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Multilayer interference fits are widely used in the machinery industry, and their performance is closely related to assembly quality. Press-fit is the primary assembly method. The pre-deformation of the previous assembly step can significantly affect the stress distribution (stress concentration) and pressing force in subsequent assembly steps. Therefore, the wear degree of the contact interface and the assembly quality of the components are affected by the assembly sequence. The multilayer thick-walled cylinder theory (MTCT) cannot realize the accurate analysis of stress distribution and pressing force during assembly. Therefore, this paper optimizes the MTCT considering the resistant force generated by the non-contact regions and proposes an assembly matrix generation algorithm and an assembly sequence optimization algorithm. Compared with the simulation analysis, the optimized theoretical model can be used for the analysis of the stress distribution and pressing force of multilayer interference components. The analysis accuracy is significantly improved compared with MTCT. The optimal assembly sequence determined by the proposed algorithm is consistent with simulation results.

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“…Hirakawa and Kubota [13] explored a fatigue design method comparing Japanese and European design philosophies and examined fretting fatigue damage of press-fitted parts. Other studies [14][15][16][17] emphasized the importance of accounting for the press-fitting effect in railway axle design and demonstrated how research findings have been applied to improve axle manufacturing. A systematic review by Günay et al [1] investigated various braking systems used in railway vehicles, as well as design and material selection.…”

Section: Introductionmentioning

confidence: 99%

Multiaxial Fatigue-Life Prediction of Railway Axles with Consideration of Braking Effects

Nwe¹,

Pimsarn²

2023

MMEP

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Ensuring safety in the design of railway infrastructure and rolling stock is a critical aspect of railway operations. Railway axles are subjected to fluctuating bending and torsion loads, which often lead to the development of plastic stresses in the vicinity of fillets and notches, even though they are designed to withstand nominal elastic loads. This study aims to provide an accurate fatigue-life prediction for a motor bogie axle, taking into account the braking effects in conjunction with press fitting and the influence of masses in motion on the axle. Initially, the stress and deflection of the axle under combined loadings are calculated in accordance with the EN 13104 standard. Subsequently, a comparative simulation analysis is conducted using ABAQUS commercial software, with particular emphasis on specific loading conditions. A strainbased approach is employed to estimate fatigue life under multiaxial loading and variable amplitude overloading scenarios, utilizing fe-safe commercial fatigue analysis software. The results reveal a strong correlation between the theoretical and finite element analyses. The braking effects are found to reduce fatigue life by 50% compared to the influences of press fitting combined with masses in motion. This research highlights the significance of considering braking effects in fatigue-life predictions of railway axles to ensure safe and robust design.

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Railway Axle and Wheel Assembly Press-Fitting Force Characteristics and Holding Torque Capacity

Cited by 6 publications

References 10 publications

Effect of Interference Size on Contact Pressure Distribution of Railway Wheel Axle Press Fitting

Effect of Interference Size on Contact Pressure Distribution of Railway Wheel Axle Press Fitting

Press-fit analysis of multilayer interference fit

Multiaxial Fatigue-Life Prediction of Railway Axles with Consideration of Braking Effects

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