Moment methods for C/SiC woven composite components reliability and sensitivity analysis

摘要

A kind of reliability analysis method for C/SiC woven composite components was proposed, which is based on moment methods. Moment methods combining with perturbation method, the central difference method, as well as the Edgeworth series are applied to calculate the reliability of complex component for its effectivity and accuracy. The results computed by moment methods are sensitive to the distribution of parameters; thus, reliability sensitivity analysis has been performed. The reliability and sensitivity information of the complex components can be accurately and quickly obtained using a practical computer program. Finally, the proposed reliability-sensitivity analysis method is applied to CMCs components design. By comparing with Monte Carlo simulation, the numerical results demonstrate that the proposed approach provides accurate, convergent, and computationally efficient for finite element method-based reliability analysis in engineering practice.