Interval dynamic reliability analysis of mechanical components under multistage load based on strength degradation

To further study the law of strength degradation, the residual strength degradation model is established based on the definition of fatigue damage, considering the interaction of various uncertain factors and time factors in service environment. Combined with equivalent damage model, a nonlinear cum...

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Bibliographic Details
Published in:Quality and reliability engineering international 2021-03, Vol.37 (2), p.567-582
Main Authors: Jiang, Changjie, Liu, Xintian, Wang, Xiaolan, Wang, Xu, Su, Shengchao
Format: Article
Language:English
Subjects:
Component reliability
Cumulative damage
Damage accumulation
Damage assessment
Degradation
dynamic reliability
Equivalence
Fatigue failure
Interval models
Load
loading sequence
Mechanical components
Prediction models
Reliability analysis
Residual strength
strength degradation model
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Summary:To further study the law of strength degradation, the residual strength degradation model is established based on the definition of fatigue damage, considering the interaction of various uncertain factors and time factors in service environment. Combined with equivalent damage model, a nonlinear cumulative damage model is proposed, which takes the interaction among loading loads into account and improves the accuracy of calculation. Additionally, the equivalent transformation of multistage load is studied using interval theory. According to the interval dynamic nonprobability reliability prediction model, a dynamic reliability analysis of the interval model is carried out. Dynamic reliability of the component is analyzed under multistage load accumulation damage to verify the effectiveness of the method.
ISSN:0748-8017
1099-1638
DOI:10.1002/qre.2749