Fatigue Damage and the Life of Aircraft Wheels under a Nonstationary Load

Abstract

It was established that the key operational factor that shapes the service life of aircraft wheels is the nonstationary nature of the operational load spectrum; typical characteristics of the nonstationary spectrum for aircraft wheels were determined—distances of movement at individual stages of ground movement and the degree of influence of lateral loads during typical maneuvers. It was shown that, under such conditions, to predict the service life, it is necessary to use phenomenological theories of damage accumulation that describe the kinetics of fatigue failure. A probabilistic model for predicting the service life of aircraft wheels was developed, which takes into account the stochasticity of service life indicators and makes it possible to obtain, by calculation, reliable estimates of the maximum time to failure in the conditions of limited information about the durability of full-scale wheels.