Probabilistic Damage Tolerance Method for Metallic Aerospace Structure.

摘要

Damage tolerance analysis, based on fracture mechanics, is an important tool for ensuring the safety of flight of airframes. Traditionally, these analyses are deterministic in nature, but probabilistic methods have been applied to damage tolerance analysis in limited cases. The purpose of this dissertation is to formulate probabilistic damage tolerance analyses for metallic structural components, based on U.S. Air Force damage tolerance philosophy for slow crack growth and fail safe components. A survey of the literature was conducted on probabilistic durability and damage tolerance methods. The important elements of the methods are covered; including the initial fatigue quality, the variability in crack growth rate, and the probability of crack detection. Probabilistic Methods, Damage Tolerance, Metallic Structures. (JES)