Aircraft Lug Failure Design Under Fatigue Loading

Abstract

For high speed systems, fatigue relevant analysis of lug-type joints plays an important role in preventing sudden hazard events. Dynamic loads are one of the main causes of system disturbance during service operations. In the present research, thus, the stress state of the lug with an elliptical corner crack-like flaw was explored, and prognostic analysis in terms of residual life was performed using a new computational framework. This study provides valuable information for both academia and industry on the detrimental effects of stress raisers for improving the optimal and safe design of fatigue-critical lug type joints.