Probabilistic sensitivity for failure of multiple site damage in aircraft structures

Different structure crack initiation position may affect the performance of the structural safety in structures containing multiple site damage. Considering that, a method to analyze the sensitivity of failure probability with respect to the stress and crack initiation life on each site was proposed to quantify their impact on the structural safety performance. A probabilistic sensitivity analysis model for failure of multiple site damage in aircraft structures was put forward using a kernel function. The Monte-Carlo simulation results in probability analysis were used to obtain the probabilistic sensitivity with a slight increase in the amount of calculation. This method was applied in analysis of a collinear porous plate, and the site with greatest impact on structural safety was identified using the probabilistic sensitivity.