Passenger Vehicle Clutch Reliability Optimization Based on the Stress-Strength Interference Model

Yan, Zhengfeng; Li, Gai Hua

doi:10.4028/www.scientific.net/amm.509.86

Cited by 3 publications

(2 citation statements)

References 1 publication

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“…A system-level load-strength interference model was introduced by Wu considering dependent failure and multiple failure models for reliability estimation of shiplift gear systems [7]. Yan applied the stress-strength interference model to the reliability analysis and the optimization design of passenger car clutch [8]. In the case where accurate probability density functions of stress and strength cannot be available, Guo proposed an interval discrete stress-strength interference model to determine the lower and upper bounds of component reliability [9].…”

Section: Introductionmentioning

confidence: 99%

Generalized Reliability Analysis of Mechanical Systems with Imperfect Maintenance

Gao

Xie

2022

Mathematical Problems in Engineering

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Generalized reliability models and failure rate models of mechanical systems are developed in this paper according to the system working mechanism, which take the design parameters as input. The models consider strength degradation and imperfect maintenance. Besides, the models take into account the failure correlation caused by homologous load effect and the maintenance correlation owing to group maintenance. Unlike traditional reliability models, the models do not rely on empirical assumptions when considering failure correlation and maintenance correlation and have clear physical meaning. Moreover, the correctness and effectiveness of the models are verified by Monte Carlo simulations. Finally, the influences of failure correlation and maintenance correlation on generalized reliability, the influences of failure correlation on maintenance correlation, and the influences of maintenance correlation on failure correlation are analyzed via numerical examples. The results show that failure correlation and maintenance correlation have great influences on generalized reliability, and the interaction between the two correlation shows obvious time-varying characteristics.

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Section: Introductionmentioning

confidence: 99%

Generalized Reliability Analysis of Mechanical Systems with Imperfect Maintenance

Gao

Xie

2022

Mathematical Problems in Engineering

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“…Methods that consider stress and fatigue strength as random variables and basing the reliability of structural strength on stress–strength interference theory are widely used. 5–11 Zhu, 12 according to the measured stress spectrum, analysed the stress distribution of the maximum fatigue damage point of the bolster and side frame. Assuming that the stress distribution is a truncated Normal distribution, the maximum likelihood estimation can be used to estimate the distribution parameters, and the accuracy of the distribution function is verified.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the dynamic response and fatigue reliability of a full-scale carbody of a high-speed train

Lü

Dang

Zhang

et al. 2018

Proceedings of the Institution of Mechanical Engineers, Part F:

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For a vehicle operating under different line conditions, coupled with track irregularity and many other factors, the carbody is subjected to extremely complex random loads, and the load mainly exists in the form of an alternating load; therefore, the primary type of failure is fatigue failure. With the continuous improvement in train speed, lightweight designs of carbody structures and the application of high-strength aluminium alloy, the safety and reliability of a carbody require more attention. An investigation of the dynamic fatigue reliability of a full-scale carbody of a high-speed train under random load conditions is carried out. A dynamics model of the vehicle system has been established for acquiring the time history of forces acting on the carbody by each air spring (hereinafter referred to as 'the load-time history'). A surrogate model (a simple model instead of a complex carbody model) of the carbody is established based on the Box-Behnken matrix design and the polynomial fitting method; then, the load-time history is transformed to the stress-time history of the points of concern, and the results are compared with the results of the transient analysis, which verify the accuracy and effectiveness of the surrogate model. Then, a stress block spectrum is obtained by rain flow counting, and the stress probability distribution is determined. Combined with the probability distribution of fatigue strength, a dynamic stress-strength interference model (the area of interference between strength and stress in the model changes over time) is established. The failure rate and dynamic reliability of the points of concern for two cases are analysed: without considering the strength degradation and considering the strength degradation. The results show that without considering the strength degradation during service, with increased service mileage, the fatigue strength reliability of the points of concern decreases continuously, and the corresponding failure rate of the points of concern decreases with time and reaches a steady value, which has the characteristics of the first two stages of the bathtub curve. By considering the strength degradation during service, the reliability of the points of concern decreases gradually, and the corresponding failure rate of the points of concern decreases and then increases, with all the features of the bathtub curve. In addition, compared with the base metal region, the fatigue resistance of the welded structure decreases due to welding. Under the same service conditions, the reliability of the welded region is relatively low, and fatigue failure is more likely to occur.

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Fatigue reliability analysis of the brake pads considering strength degradation

Zhang¹,

Jiang²,

Wu³

et al. 2020

Eksploatacja i Niezawodność – Maintenance and Reliability

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Reliability prediction of the brake pads is indispensable to guarantee their safety. In the paper, the fatigue reliability of brake pads is analyzed by dynamic stress-strength interference (SSI) model considering strength degradation. Firstly, reliability model of the brake pads was established based on stress-strength interference model considering the influence of impact load. Then reliability of the brake pads was predicted under different impact load frequency and initial strength. Finally, the influence of random degradation strength on reliability was studied by contrast. The analysis results show that random strength degradation, impact load and initial strength have great influence on reliability prediction for the brake pads. Therefore, the reliability prediction of the brake pads fatigue strength considering strength degradation is more in line with the actual situation and the calculation accuracy is higher.

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Passenger Vehicle Clutch Reliability Optimization Based on the Stress-Strength Interference Model

Cited by 3 publications

References 1 publication

Generalized Reliability Analysis of Mechanical Systems with Imperfect Maintenance

Generalized Reliability Analysis of Mechanical Systems with Imperfect Maintenance

Analysis of the dynamic response and fatigue reliability of a full-scale carbody of a high-speed train

Fatigue reliability analysis of the brake pads considering strength degradation

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