earticle

영어

Aircraft are among the most effective war weapon systems. There are many efforts to improve their service life and to ensure the safety of their structure. In the past, the deterministic approach, such as durability and damage tolerance, has been mainly used to predict the service life of an aircraft structure using fixed parameters (the initial flaw, material property, etc). The most important parameter, however, may not be the certain statistical factor for assessing the IFQ (Initial Fatigue Quality). Probabilistic analysis has recently been adopted by advanced countries as a new approach to enhancing flight safety in aerospace fields. Probabilistic analysis based on fracture mechanics can especially predict such service life and perform risk assessment using the probability of failure. In this paper, the paradigm of aircraft structural life management is reviewed and the parameter used in probabilistic fracture mechanics is analyzed. Furthermore, the new process of probabilistic risk assessment is proposed to evaluate the statistical factor. In the future, the proposed process can be used to establish aircraft maintenance policies such as RCM (Reliability-Centered Maintenance) and CBM (Condition-Based Maintenance). Aircraft structure, Service life, Fracture mechanics, Probability of failure, Probabilistic risk assessment