Fatigue fracture analysis of brake disc bolts under continuous braking condition

Zhou, Suxia; Guo, Zihao; Bai, Xiaoyu

doi:10.1016/j.engfailanal.2020.104588

Cited by 19 publications

(4 citation statements)

References 18 publications

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“…Hsueh conducted a study that discussed the application of a thermoelectric cooling module in vehicle braking systems. The study aims to prevent high temperatures that rise due to braking force for a long time [61][62][63][64] . The modules implemented include a disc brake system and a drum brake system.…”

Section: Fig 4: Schematic Of Thermoelectric Cooling System On Battery...mentioning

confidence: 99%

Mini Review of Thermoelectric and their Potential Applications as Coolant in Electric Vehicles to Improve System Efficiency

Harsito¹,

Putra²,

Purba³

et al. 2023

Evergreen

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Thermoelectric is a phenomenon of the temperature difference conversion into electrical energy or vice versa. The phenomenon has been developed into a module so that it can be used as a power generator or as a cooling/heating device. The use of thermoelectric can be further expanded as a system for generating small electrical energy and as a component for compact cooling and heating. If a unidirectional voltage is applied to the thermoelectric module, a temperature difference occurs between the two sides of the module. The cold side can be used as a cooler and the hot side can be used as a heater. Thermoelectric refrigeration technology has been applied in various applications such as beverage coolers and electronic coolers. However, the application of this technology in the vehicle still needs attention because it has good potential. Reviews relating to the application of thermoelectric cooling in vehicles are still not widely discussed, especially in terms of vehicles such as the performance of electric motors and braking. So, in this study, the use of thermoelectric as coolants in large components such as cooling in electric vehicles and braking components are discussed. Basic knowledge of the history, characteristics, performance of thermoelectric are also covered. Studies that had been carried out in several reported topics prove the potential and reliability of thermoelectric.

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Section: Fig 4: Schematic Of Thermoelectric Cooling System On Battery...mentioning

confidence: 99%

Mini Review of Thermoelectric and their Potential Applications as Coolant in Electric Vehicles to Improve System Efficiency

Harsito¹,

Putra²,

Purba³

et al. 2023

Evergreen

View full text Add to dashboard Cite

show abstract

“…Samples near the fracture of high-pressure outer cylinder bolts were taken for metallographic and microstructure inspection [9][10] . The whole cross-section of the bolt, after being corroded by a corrosive agent, appeared as polygonal particle patches with different colors and brightness under different angles of light.…”

Section: Microstructure Detection and Analysismentioning

confidence: 99%

The fracture reason of high-pressure outer cylinder bolt

Lyu,

Wang

2023

J. Phys.: Conf. Ser.

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The power plant experienced a cylinder bolt fracture accident during the power generation process of the unit. This study conducted fracture research and analysis on fractured bolts through a series of macroscopic and microscopic detection methods. The analysis results indicated that the cause of the bolt fracture accident of the high-pressure outer cylinder of the 5th steam turbine this time was the improper heat treatment process during the bolt material processing stage, which resulted in coarse grain size and severe insufficient impact toughness of the bolt material. Finally, the crack occurred at the position with the largest load and gradually expanded in a brittle manner until the overall fracture failure.

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“…Fortunately, the cracking and bolt fracture failures of brake discs have been widely investigated using fatigue theory based on the finite element method (FEM) and theoretical analyses. [19][20][21][22] These studies have shown that the cracking of brake discs is mainly caused by severe vibration, especially when it is excited by the worn wheels during operations. However, the brake disc has been analysed in previous studies without considering the vehicle vibration environment induced by track irregularities and/or wheel flats.…”

Section: Introductionmentioning

confidence: 99%

Dynamic response analysis of the brake disc of a high-speed train with wheel flats

Wang

Gebreyohanes

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part F:

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To study the vibration characteristics and stress state of brake discs during vehicle operations, a spatial trailer car-track coupled dynamics model was developed with the consideration of flexible brake disc. In the model, the components of a trailer car are considered as rigid bodies. Flexible models of the brake disc and wheelset were established using the finite element method. The trailer car-track coupled dynamics model is validated using experimental test results. The effects of wheelset flexible deformation on the dynamic properties of brake discs were investigated with the excitations of track irregularity and wheel flats. Furthermore, the brake disc was systematically evaluated and discussed under the condition of wheel flats in the coupled dynamics system. The results indicate that compared to rigid wheelsets with wheel flats, flexible wheelsets can cause the brake disc to vibrate more severely with higher stress. The severe vibration and high stress state of the brake disc could cause it to crack in the region near the bolts. The established dynamics model can be further developed and employed to assess the dynamics of the brake systems of high-speed trains.

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Fatigue fracture analysis of brake disc bolts under continuous braking condition

Cited by 19 publications

References 18 publications

Mini Review of Thermoelectric and their Potential Applications as Coolant in Electric Vehicles to Improve System Efficiency

Mini Review of Thermoelectric and their Potential Applications as Coolant in Electric Vehicles to Improve System Efficiency

The fracture reason of high-pressure outer cylinder bolt

Dynamic response analysis of the brake disc of a high-speed train with wheel flats

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