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Failure Rate Modeling of Mechanical Components and Systems

In: Advances in Reliability and Maintainability Methods and Engineering Applications

Author

Listed:
  • Liyang Xie

    (Northeastern University)

Abstract

For products subjected to many times of load action during service, product life is dominated by load and its capability against load, referred to as strength. This chapter introduces load-strength interference analysis based failure rate modelling method, develops component and system failure rate models, and illustrates the causal relation between failure rate curve shape and load/strength characteristics. For the majority of mechanical components and systems, service load can be described as a random process, material property degrades during load actions, and the dynamic load-strength relationship makes the failure rate change continuously. As failure occurs on load exceeding strength, failure rate models are developed by analyzing the competition behavior between load and strength. By such failure rate models, the effects of load uncertainty, strength uncertainty and strength degradation pattern on failure rate curve shape are demonstrated. Meanwhile, the three stages of the bathtub curve are interpreted in terms of stochastic load-strength competition behavior, the roller coaster type failure rate curve is attributed to the strength diversity of the products in a population.

Suggested Citation

  • Liyang Xie, 2023. "Failure Rate Modeling of Mechanical Components and Systems," Springer Series in Reliability Engineering, in: Yu Liu & Dong Wang & Jinhua Mi & He Li (ed.), Advances in Reliability and Maintainability Methods and Engineering Applications, pages 133-154, Springer.
    • Handle: RePEc:spr:ssrchp:978-3-031-28859-3_6
    DOI: 10.1007/978-3-031-28859-3_6
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