Reliability model of cumulative fatigue damage of load-sharing parallel system

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Abstract

The conventional reliability model of parallel system is inadaptable to the parallel system where the load is transferred and shared. Analyzing the dependent failure and stepwise computing the reliability of a parallel system, the reliability model of cumulative fatigue damage of a load sharing parallel system is developed according to the total probability formula and Miner theory. Then, a simulative computation is done by the Monte Carlo method for the reliability of parallel system in which the service life of a component follows the Weibull distribution, with the explicit formula of system reliability deduced for the service life of a component that follows the logarithm normal distribution. As a result, a reliability model of cumulative fatigue damage for the parallel system under the action of varying stress is developed.

Original languageEnglish
Pages (from-to)262-265+278
JournalDongbei Daxue Xuebao/Journal of Northeastern University
Volume30
Issue number2
Publication statusPublished - Feb 2009
Externally publishedYes

Keywords

  • Cumulative fatigue damage
  • Load sharing
  • Parallel system
  • Reliability
  • Service life distribution

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