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- Type of Document: M.Sc. Thesis
- Language: Farsi
- Document No: 44388 (45)
- University: Sharif University of Technology
- Department: Aerospace Engineering
- Advisor(s): Abedian, Ali
- Abstract:
- When today’s aircrafts reach the end of their service lifes, fatigue cracks are found to have developed along rivet holes and other highly stressed regions of the aircraft. In order to extend life of these aircrafts, repairs have been made to arrest these cracks. Composite repair patches provide an innovative repair technique, which can enhance the way aircrafts are maintained. In this thesis, composite patch design is presented based on axiomatic design technique. Axiomatic design is investigated design methodology for large or complex system design. Tools to enable successful application of axiomatic design are expressed as axioms and process for axiomatic system design. The patch design system architecture is decomposed from top level requirements using the principles of axiomatic design with consideration of many design parameters and constraints. A new conceptual repair process for damaged structures has been developed with zigzagging between the domains. The full design matrix of repair process created by decomposition of the composite patch repair, and presented step by step design process in a systematic way. This involves the selection of adhesive material and its thickness, determination of patch dimension, selection of patch material, repair process and final stress analysis method. It is anticipated that the suggested repair design process will be a useful tool for engineers involved in aircraft maintenance
- Keywords:
- Patch Design ; Bonded Repair ; Axiomatic Design ; Design Matrix ; Zigzagging Method
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