Predicting fatigue crack growth under variable amplitude loadings with usage monitoring data

摘要: For complex engineering systems, there is an increasing interest in the use of structural health monitoring systems to estimate current state damage (diagnosis) and predict behavior future (prognosis). fatigue crack growth, one challenge prognosis dynamic stress history at location damage. In this article, a method predicting growth aircraft panels proposed under variable amplitude loading. A simple analytical–numerical calculate from usage data. analysis then conducted through model with extended finite element method. Numerical examples show that effect underload overload significant growth. It also indicated rate direction can significantly change multi-axial loading environment.