Abstract
The properties of materials directly affect the performance of the sealing structures, among which the rubber O-ring seal is one of the most commonly used. In addition, the performance of the O-ring seal is often influenced by the randomness in structure and working conditions, which greatly reduce the reliability of the sealing structure. This paper proposes a reliability-based method to analyze the influence of the randomness in rubber material parameters on the sealing performance of the O-ring. Based on the failure mechanism of the O-ring seal, the stochastic characteristics of the parameters in O-rings are determined through experiments, and the influences of these parameters on the reliability are subsequently analyzed. Moreover, the working conditions are also taken into account to analyze their influence on the performance and reliability of the O-ring seal. The proposed method provides easy access to estimate the reliability of the rubber O-ring seal considering the uncertainty in structure and operational conditions. It is revealed that the material and geometric parameters had greater influence on the reliability of the rubber O-ring.
Highlights
Rubber O-ring seals are one of the most commonly used sealing structures in mechanical systems.In sealing structures, failure of the rubber O-ring seal may lead to catastrophic accidents [1,2]
Failure of the rubber O-ring seal may lead to catastrophic accidents [1,2]
The randomness of the parameters of these factors will have a certain impact on the reliability of the rubber O-ring seal
Summary
Rubber O-ring seals are one of the most commonly used sealing structures in mechanical systems. It is necessary to analyze the randomness of the parameters to discover the influences on the reliability of the rubber O-ring seal, so as to improve the economy and safety of their application. The aging of the rubber significantly affects the physical properties of the seal [17,18] These studies did not carry out reliability-based seal performance analysis [19], which makes it difficult for us to distinguish different reliability requirements under various conditions, and the uncertainties of the working conditions were ignored. 2. Reliability Model-Based Analysis of Rubber Materials under Application Condition. The failure mechanism of the rubber O-ring seal based on the physical model is analyzed followed by reliability modeling. The randomness from the material, geometry, and load parameters of the rubber O-ring is discussed in detail to characterize the influences on reliability
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