Transient Thermo-Stress Field of Brake Shoe During Mine Hoist Emergency Braking

Zhu, Zhen; Ma, Wensheng; Peng, Yuxing; Chen, Guo A.; Liu, Bin B.

doi:10.1139/tcsme-2013-0098

Cited by 10 publications

(17 citation statements)

References 14 publications

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“…At 1 mm depth, the temperature value is around 65 C, and at 2 mm, the temperature is lower for almost 20 C than temperature that appeared on the contact surface, what Zhu et al [5] proved in their research. Where this is logical, if the frictional heat generated (heat flux) [27] for the third case is calculated, the following results are obtained: the braking disc heat flux is 91521.41 W/m 2 , and the braking pad heat flux is 11165.71 W/m 2 .…”

Section: Resultsmentioning

confidence: 69%

“…However, researches that have been studied the transfer of heat through the braking pads indicated that the temperature value decreases with increasing distance from the contact surface with the disc [5].…”

Section: --------------mentioning

confidence: 99%

“…The minimum recommended thickness of the brake pad by the manufacturers is 2 mm [6]. Based on a study that achieved by Zhu et al [5], the surface temperatures may exceeds 50 C at a distance of 2 mm from the contact zone.…”

Section: --------------mentioning

confidence: 99%

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Pressure influence on heating of ventilating disc brakes for passenger cars

et al. 2020

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The braking system is one of the most important elements in vehicle systems from the aspect of vehicle safety, besides the steering system and the internal combustion engine. During the braking process, the disc and pads absorb a large amount of kinetic energy that converted to heat. Owing to this frictional heating, it is necessary to compute the temperature distribution that will be appeared during the braking process, which is the main goal of this research paper. There are many factors that can be influenced to the distribution of frictional heat generated. One of the significant factors is the applied pressure by the brake pad on the braking disc. The results proved that when increased the applied pressure then the frictional heat generated increased too. It was developed a new finite element model based on observed data from real vehicle. It was used ANSYS/WORKBENCH 14.5 software to perform the numerical analysis, module Transient Structural. Parts that are the most disposed to the thermal stress are braking pads. Also, it was found time period from 0 to 0.1 second is the most critical period during the whole braking period, because in this period, temperature rises rapidly, the maximum temperature occurred at 1.338 seconds, and after that it falls.

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Section: Resultsmentioning

confidence: 69%

Section: --------------mentioning

confidence: 99%

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Pressure influence on heating of ventilating disc brakes for passenger cars

et al. 2020

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“…Four sides of brake shoe can be treated as plate. Convection heat transfer coefficient of vertical plate and horizontal plate 16 can be expressed as…”

Section: Random Response Modeling Of the Brake Shoementioning

confidence: 99%

The probabilistic modeling and reliability analysis of brake shoes for hoist disc brake with correlated failure modes

Ren

Chen

et al. 2014

Advances in Mechanical Engineering

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In view of the lack of reliability research with correlated failure modes of the hoist disk shoes, the stochastic finite element method was used to analyze the reliability of multi-failure mode under emergency braking condition of disk shoe for deep well hoist. First, the finite element model of friction pair of brake disk and brake shoe was established based on the theory of heat conduction, the stress of brake shoe was simulated, and the influence of different initial braking speeds on friction pair temperature and thermal stress is analyzed. Second, the Latin hypercube sampling method was used to perform the design of experiment and the data of the random experiment are obtained. The Kriging model was used to establish the functional relationship between the random variables and the stress and temperature of the brake shoe. Then, based on the method of saddlepoint approximation, the reliability evaluation was carried out considering stress and temperature failure. Finally, the system reliability evaluation of brake shoe considering the correlation of the two failure modes is carried out based on Frank copula.

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“…Kumar et al 7 investigated the effects of various metallic fillers in friction materials on hot-spot appearance during braking. Zhu et al 8 and Gao and Lin 9 established the three-dimensional transient thermal field model of the brake under constant brake torque during emergency braking. Zhu et al 10 explored frictional catastrophe mechanisms of brake shoe during repetitious emergency braking.…”

Section: Introductionmentioning

confidence: 99%

Dynamic brake characteristics of disc brake during emergency braking of the kilometer deep coal mine hoist

Wang

Zhang

2014

Advances in Mechanical Engineering

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Dynamic brake characteristics of disc brake during emergency braking of the kilometer deep coal mine hoist were investigated in the present study. The theoretical model of dynamic brake torque of disc brake during emergency braking was given to explore dynamic brake torque properties of disc brake. The three-dimensional thermo-mechanical coupled finite element model of brake disc–brake shoe was established to explore thermo-mechanical characteristics of disc brake during emergency braking. Effects of effective mass, hoisting acceleration and deceleration, and maximum hoisting speed on dynamic brake torques, equivalent von Mises stress, and temperature fields of disc brake during emergency braking were presented. The results show that the evolutions of brake torque, equivalent stress, and temperature of disc brake present fluctuating characteristics. The dynamic brake torque shows the largest change amplitude during emergency braking in the hoisting stage of constant speed. The largest equivalent stress and temperature are both located near the third brake shoe along the rotational direction at each side. An increase in effective mass causes overall decreases in the peak values of brake torque, equivalent stress, and temperature during emergency braking. Increases in hoisting acceleration/deceleration and maximum hoisting speed cause the increases in the maximum equivalent stress and temperature during emergency braking as compared to the slight decrease in the maximum brake torque.

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Transient Thermo-Stress Field of Brake Shoe During Mine Hoist Emergency Braking

Cited by 10 publications

References 14 publications

Pressure influence on heating of ventilating disc brakes for passenger cars

Pressure influence on heating of ventilating disc brakes for passenger cars

The probabilistic modeling and reliability analysis of brake shoes for hoist disc brake with correlated failure modes

Dynamic brake characteristics of disc brake during emergency braking of the kilometer deep coal mine hoist

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