Probabilistic Sensitivity Analysis of Fretting Fatigue (Preprint)

摘要

A probabilistic analysis of the fatigue life of specimens subject to fretting fatigue was carried out. A mechanics based fretting life analysis was applied that accounted for the local stress gradient at the edge of contact. The random variables in the analysis included the initial crack size, coefficient of friction, crack growth rate law, and the contact pad profile. The variation in pad profiles was determined through statistical analysis of seventy-seven machined pads. A probabilistic fatigue analysis was applied using Monte Carlo sampling to determine the statistics (mean and standard deviation) of the fatigue life prediction and the probabilistic sensitivities (partial derivatives of the fatigue statistics with respect to the input probability density function parameters).