Reliability prediction of helicopter transmission systems using stress–strength interference with underlying damage accumulation

Abstract

This paper describes research into the development of reliability prediction models for rotor transmission systems in which component failure is caused by underlying aging processes such as fatigue, wear or corrosion. Reliability prediction is based on the stress–strength interference methodology, with stress related to surface damage and strength to the limit of allowable damage. The paper describes how damage accumulation and system failure logic is incorporated within the stress and strength functions. For fatigue‐dominated processes, damage grows with number of cycles in response to applied load and environmental conditions. The concept of ‘operating state’ is used to model statistical damage accumulation. Operating states describe load and lubrication conditions and associated statistical damage accumulation rate parameters. Growth rate variance is related to operating state transitions and can be modelled using stochastic techniques. Fatigue strength is obtained from S–N data. Formulated in this way, reliability can be predicted from design and operational parameters rather than historical failure data. Copyright © 1999 John Wiley & Sons, Ltd.

Probabilistic Modeling of Fatigue Damage Accumulation for Reliability Prediction

“…The well-known stress-strength interference model considers product reliability from the probabilistic point of view. This concept has been used by many researchers for developing models to predict product reliability in the past [11,[22][23][24]. Liao et al [11] have classified existing cumulative fatigue damage models for reliability prediction into two groups based on fundamental assumptions and hypothesis as: (i) static statistical models and (ii) dynamic statistical models.…”

Modeling and Analysis of Performance Degradation Data for Reliability Assessment: A Review

“…The stress-intensity model is developed by deriving the relationship between stress loading and material strains [123]. In the past, Place et al [128] employed this model to describe the degradation of a helicopter transmission system where the effects of the degradation accumulation on system failures are obtained based on strain-stress functions (S-N curve).…”

Reliability Model Construction for Complex System Based on Common Cause Failure Network

“…However, "relevance" is a common feature of mechanical system failures. If the system failure correlation was ignored and the assumption that the various components of system failure are independent was conducted, large errors or even wrong conclusions will reach during the process of system reliability analysis and calculation [12][13][14][15].…”