C. Guijt, D. Hill, J. Rausch, S. Fawaz

A significant workload for large transport aircraft is related to fuselage dent repair. This research program addresses both the effect of dents and reformed dents on durability (fatigue) and static stability. In fatigue, tension-tension loading is used, and both compression and shear loading are considered for static stability. Different dent shapes and depths in unstiffened flat sheets were subjected to fatigue loading. Reformed dents were fatigue tested as well. The current status is that although dents do decrease fatigue life, and reforming dents does somewhat restore the loss in fatigue life; none of the dents tested would shorten the fatigue life of the skin below the required life for the airframe. For fatigue loaded structures with dents, this opens the possibility to greatly reduce the workload and prevent unnecessary repairs. For static stability, representative flat stiffened aircraft panels were loaded in compression and shear. Based on the effective width of the skin in compression, which is small for the configuration tested, the dents have no effect on structural stability and do not need to be repaired. The outcome of this program is that a significant amount of time and money can be saved by avoiding unnecessary structural repairs for the typical fuselage configuration tested. These results can be applicable to similar fuselage structures of other large transports.

23rd ICAF Symposium of the international Committee on Aeronautical Fatique, 2005, Hamburg

Conference Poster

englisch

A5, 12 Seiten

DGLR-Bericht, 2005, 2005-03, 23rd ICAF Symposium of the international Committee on Aeronautical Fatique - Proceedings; S.417-428; 2005; Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V., Bonn

NA

fuselages, stability, shear stress, fatigue, compression, dents

Bestellbar

2005