Fatigue life prediction of high‐speed train bearings based on the generalized linear cumulative damage theory

Li, Hefei; Wei, Jia‐Liang; Li, Shaohua; Liu, Yongqiang; Gu, Xiaohui; Liu, Ze‐Chao; Yang, Shaopu

doi:10.1111/ffe.13984

Cited by 5 publications

(4 citation statements)

References 36 publications

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“…Under the same stress amplitude, specimens under different loading waveforms exhibited different levels of cyclic hardening, resulting in different magnitudes of saturated cyclic strain amplitudes. A higher level of cyclic hardening corresponded to a smaller value of the saturated cyclic strain amplitude over time, and a lower cyclic strain amplitude implied a lower rate of cyclic damage accumulation, which is beneficial to increasing the fatigue life of the specimens [18,19]. In addition, the variation in cyclic loading waveforms resulted in changes in the proportion of Zone I and Zone II, a larger area of Zone I and Zone II indicated longer crack initiation and propagation life.…”

Section: Fatigue Life Prediction Modelmentioning

confidence: 95%

Influence of Loading Waveform on the Fatigue Life of 34CrNi3MoVA Steel

Guan,

Tang,

Chen

2024

Metals

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Mechanical components often experience fatigue loading from various waveform conditions during their operational lifespan. However, the underlying mechanisms through which variations in loading waveform affect the fatigue life of components remain unclear. Thus, this study conducted tension–compression fatigue experiments on 34CrNi3MoVA steel specimens under the same stress amplitude with different waveforms (cosine, triangular, sawtooth, and reverse sawtooth) to investigate the effects of loading waveform variations on the cyclic strain hardening behaviors, the fatigue fracture failure, and the fatigue life. The results indicated that specimens under different waveforms all exhibited cyclic strain hardening. The fatigue cyclic hardening level progressively increased in the order of cosine, triangular, and sawtooth waveforms, resulting in a continuous increase in cyclic saturation strain amplitude. The analysis of fatigue fractures demonstrated a consistent increase in both the initiation and propagation zone areas in the order of cosine, triangular, and sawtooth waveforms, and the boundary between the propagation and final fracture zones gradually shifted from a straight to a curved shape. The influence mechanisms of cyclic loading waveforms on the fatigue life of specimens were analyzed based on the energy dissipation, leading to the development of a universal fatigue life prediction model applicable to different waveform conditions, the model was then verified with the reverse sawtooth wave specimens and resulted in a prediction error less than 15%. The study is expected to serve as a significant guide for predicting and evaluating the fatigue life of mechanical components under various fatigue loading conditions.

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Section: Fatigue Life Prediction Modelmentioning

confidence: 95%

Influence of Loading Waveform on the Fatigue Life of 34CrNi3MoVA Steel

Guan,

Tang,

Chen

2024

Metals

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“…The principle of fatigue damage focuses on that damage under loading conditions is a cumulative process. Miner linear accumulation criterion [34] is described as a linear approach to calculate the cumulative damage of loading. According to the S-N curve, it is known that the theoretical fatigue life of the stent is different at different stress levels, so the degree of damage suffered is also different.…”

Section: Corrosion Fatigue Algorithm Modelmentioning

confidence: 99%

Numerical Simulation of Dynamic Degradation and Fatigue Damage of Degradable Zinc Alloy Stents

Qi,

Zhang,

Chen

et al. 2023

JFB

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Current research on the fatigue properties of degradable zinc alloy stents has not yet considered the issue of the fatigue life changing with material properties during the dynamic degradation process. Therefore, in this paper, we established a fatigue damage algorithm to study the fatigue problem affected by the changing of material properties during the dynamic degradation process of the stent under the action of pulsating cyclic loading. Three models: the dynamic degradation model, the dynamic degradation model under pulsating cyclic loading, and the coupled model of fatigue damage and dynamic degradation, were developed to verify the effect of fatigue damage on stent life. The results show that fatigue damage leads to a deeper degree of inhomogeneous degradation of the stent, which affects the service life of the stent. Fatigue damage is a factor that cannot be ignored. Therefore, when studying the mechanical properties and lifetime of degradable stents, incorporating fatigue damage into the study can help more accurately assess the lifetime of the stents.

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“…Damage accumulation under variable loads is a relatively complex process. Current linear and nonlinear damage accumulation theories cannot completely match the product's actual damage accumulation trajectory, and their error sizes are generally similar [28,29]. Among them, Miner's linear damage accumulation theory is the simplest and most widely used in engineering.…”

Section: Reliable Life Consumption Remaining Reliable Life and Corres...mentioning

confidence: 99%

A Reliable Life Consumption Assessment and Individual Life Monitoring Method for Rolling Bearings

2023

Machines

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Rolling bearings are critical rotating components in aerospace and high-speed trains. The service loads of rolling bearings are generally different from each other, causing significant differences in their damage degrees and reliable life potential. To ensure bearing reliability during service, a reliable life consumption assessment and individual life monitoring method is proposed. Firstly, a small-sample reliable life evaluation method is established based on an accelerated life test conducted at a constant load or load block spectrum before delivery, by which the lower confidence limit of the reliable life of the rolling bearing under any service load can be calculated with the required confidence and reliability. Then, the confidence limits of the reliable life consumption percentage and remaining reliable life percentage for each rolling bearing can be evaluated in real time according to their online monitoring loads and Miner’s law. By this means, individual life monitoring and online life management can be conveniently realized. Compared with traditional bearing life management methods, which do not consider service load differences, this method can more effectively ensure service safety and simultaneously maximize the life potential of bearings.

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Fatigue life prediction of high‐speed train bearings based on the generalized linear cumulative damage theory

Cited by 5 publications

References 36 publications

Influence of Loading Waveform on the Fatigue Life of 34CrNi3MoVA Steel

Influence of Loading Waveform on the Fatigue Life of 34CrNi3MoVA Steel

Numerical Simulation of Dynamic Degradation and Fatigue Damage of Degradable Zinc Alloy Stents

A Reliable Life Consumption Assessment and Individual Life Monitoring Method for Rolling Bearings

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