Reliability analysis of dependence-failure system for wire cables

The reliability of wire cables is modeled analyzing their mechanical properties during applications, thus evaluating the reliability. The cable is simplified to be a parallel-series model first, considering both Weibull effect and Daniels effect on its mechanical properties. Then, an expression of Weibull distribution of the strength of the series system with Weibull effect is deduced from order statistic, and an analysis is made to the strength computation formula of the parallel system Daniels effect and relevant distribution function. Assuming that there is no independence-failure, as a result, the reliability model of wire cables is developed by conditional probability and stepping computation. The result shows that the reliability model developed provides a reference to the reliability design of wire cables with dependence failure revealable.