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Patch materials selection for ageing metallic aircraft structure using digital quantitative materials selection methods

Fouladi, E ; Sharif University of Technology

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  1. Type of Document: Article
  2. Abstract:
  3. When aircrafts reach the end of their service life,fatigue cracks are found to have developed along rivet holes andother highly stressed regions of aircrafts.In order to extend the life of these aircrafts, repairs should be made to arrest these cracks.Composite doublers or repair patches provide an innovative repair technique,which can enhance the waywhich aircrafts are maintained.Bonded repair of metallic aircraft structure is used to extend the life of flawed or under-designed components at reasonable cost.Such repairs generally have one of three objectives: fatigue enhancement,crack patching or corrosion repair.Repair of cracked structure may be performed,by bonding an external patch to the structure,toeither stop or slow crack growth.The selected material must be able to withstand the expected conditions in the damaged area.The material selected for the patch will almost always be either metallic or composite and within these classes,there are many different materials with different advantages and disadvantages associated with their use. Applying materials selection methods would make it possible to select the best material considering every important participating factorsand their level of importance.Materials selection is a multidisciplinary research, which integrates a large number of knowledge fields.It can help to have a good choice in design patch for damaged components.Here,two new digital logic methods will be examined to the above task
  4. Keywords:
  5. Aging ; Boron/epoxy ; Graphite/epoxy ; Materials selection ; Patch ; Cracked structures ; Different materials ; Digital logic methods ; Metallic aircraft structures ; Multi-disciplinary research ; Repair techniques ; Aerodynamics ; Aging of materials ; Aircraft ; Aircraft manufacture ; Airframes ; Cracks ; Repair
  6. Source: 27th Congress of the International Council of the Aeronautical Sciences 2010, ICAS 2010, 19 September 2010 through 24 September 2010 ; Volume 3 , 2010 , Pages 1873-1881 ; 9781617820496 (ISBN)
  7. URL: http://www.icas.org/ICAS_ARCHIVE/ICAS2010/ABSTRACTS/181.HTM