A risk assessment method of aircraft structure damage maintenance interval Indexed by: considering fatigue crack growth and detection rate

Abstract

The accurate assessment of aircraft structure damage risk is the premise of establishing reasonable, economic and reliable maintenance intervals. While many studies have proposed damage risk assessment methods for aircraft structures, these methods lack the quantification of risk. This paper proposed a risk assessment method of aircraft structure damage maintenance interval considering fatigue crack growth rate and crack detection rate. The damage process of aircraft structure was simulated by Monte Carlo simulation to realize the quantitative assessment of aircraft structure damage risk and maintenance interval. Taking an aircraft fleet as an example, the damage risk of its wing structure was simulated and analyzed. The results show that if the risk is controlled within a reasonable range, the maintenance interval should be shortened to 16 flight hours. At the same time, through the analysis of the risk classification standard and the crack detection rate, the quantitative evaluation of the risk classification standard was realized.

A Comprehensive Review of Emerging Trends in Aircraft Structural Prognostics and Health Management

“…(1) Inspection and Maintenance Schedules: In these highly systematic and standardized procedures, technicians conduct meticulous physical examinations of aircraft structures at predetermined intervals [36,37]. The purpose of these checks is to identify any observable signs of structural degradation, such as corrosion, distortion, cracks, or even loose parts [38]. Given the fundamental nature of these inspections, they constitute the primary line of defense against possible structural failure, ensuring the aircraft's physical condition is maintained at its optimal state.…”

Deformation measurement system for UAV components to improve their safe operation

“…Polymer composites [15] and layered structures that are a combination of metal alloy and fibre/epoxy prepreg are also used in aviation [30]. However, in the case of aircraft structures, it is particularly important to assess fatigue crack growth rate and crack detection rate for risk evaluation [32].…”