H.-J. Schmidt

Fatigue and damage tolerance analysis and testing became one of the key means during development, design and maintenance of aircraft structure. This is the result of the increased requirements regarding structural reliability, low weight, low manufacturing costs and low operating costs. Furthermore, any new structure has to fulfill the more stringent actual airworthiness requirements, which will be advanced again to further improve the reliability of the aircraft by providing the so-called large damage capability. This behavior is an additional mean to detect critical structural damages, which were not found during normal maintenance. This lecture gives a brief overview about fatigue and damage tolerance analysis methods for conventional fuselage structure for local and multiple damages as well as examples of major development and certification tests, e.g. curved panel tests, barrel tests and full scale fatigue tests. The increased requirements and expectations led to significant efforts in developing more efficient structures by using advanced monolithic and hybrid materials, new assembly methods and, in the future, by possible application of structural health monitoring. The lecture describes advanced materials, fiber metal laminates, laser beam welding, friction stir welding, bonding I metal laminates and structural health monitoring. The major advantages and disadvantages of these technologies regarding fatigue and damage tolerance are discussed including examples of application. Important fatigue and damage tolerance test results are presented as well as the improved analysis methods, which take into account the new characteristics of the advanced materials and technologies.

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

Conference Paper

englisch

A5, 41 Seiten

DGLR-Bericht, 2005, 2005-03, 23rd ICAF Symposium of the international Committee on Aeronautical Fatique - Proceedings; S.1-41; 2005; Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V., Bonn

NA

fatigue life, regulations, damage tolerance, welding technologies, structural health monitoring

Bestellbar

2005