Authors: Boljanović, Slobodanka 
Title: Computational modeling of aircraft lugs failure under fatigue loading
Journal: International Journal of Fatigue
Volume: 114
First page: 252
Last page: 261
Issue Date: 1-Sep-2018
Rank: M21
ISSN: 0142-1123
DOI: 10.1016/j.ijfatigue.2018.05.022
In the present paper, a computational model of failure is developed to assess the fatigue behaviour of damaged aircraft lugs. In such a fracture mechanics-based analytical/numerical research work, the residual strength of lugs with either a through-the-thickness crack or a quarter-elliptical corner crack is estimated, and then, through the experimental observations found in the literature, some applications are discussed. A stress field of pin-loaded linkage is numerically analyzed by using the finite element method. The failure resistance of lugs is quantified through the Huang-Moan crack growth concept in terms of fatigue life and crack path. The relevant crack driving forces are examined through a new analytical model, taking into account the effect of a lug head and the width-to-diameter ratio effect.
Keywords: Aircraft lug | Crack path | Fatigue strength | FEM | Quarter-elliptical/through cracks
Publisher: Elsevier
Project: Dynamics of hybrid systems with complex structures. Mechanics of materials. 

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