Performance Degradation Prediction and Reliability Evaluation of Rubber Aging in Natural Environment Under Alternating Cyclic Thermal Load

With a focus on predicting the degradation of rubber performance in the natural environment and evaluating its reliability, the distribution law of accelerated aging life is analyzed through the accelerated aging test of hot oxygen. A Weibull distribution model is then established to verify the cons...

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Bibliographic Details
Published in:IEEE access 2019, Vol.7, p.63027-63035
Main Authors: Liu, Qiaobin, Shi, Wenku, Li, Kunhen, Chen, Zhiyong, Liu, Helong
Format: Article
Language:English
Subjects:
Accelerated aging tests
Accelerated tests
Acceleration
Aging
Aging (natural)
alternating stress
Curve fitting
Cyclic loads
Degradation
Equivalence
Mathematical model
Mathematical models
natural aging
Performance degradation
reliability
Reliability analysis
Reliability aspects
Rubber
Segmentation
Temperature distribution
Thermal analysis
Thermal stress
thermal stress amplitude coefficient
Weibull distribution
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Summary:With a focus on predicting the degradation of rubber performance in the natural environment and evaluating its reliability, the distribution law of accelerated aging life is analyzed through the accelerated aging test of hot oxygen. A Weibull distribution model is then established to verify the consistency of the accelerated aging mechanism. Through the constant stress accelerated aging test data, the aging characteristics of the rubber under alternating thermal stress load in the natural environment are inferred. The concept of thermal stress amplitude coefficient is proposed, and its numerical value is calculated by the combination of numerical simulation and single-peak curve fitting. Under the principle of time-temperature equivalence, the segmentation time equivalent method and the overall temperature equivalent method are employed to calculate the rubber performance degradation curve under natural environment aging conditions. Finally, according to the Weibull distribution, the aging reliability of the rubber over time is simulated. This research can provide a reference for the aging reliability evaluation of products under alternating stress.
ISSN:2169-3536
2169-3536
DOI:10.1109/ACCESS.2019.2917008