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http://dx.doi.org/10.9766/KIMST.2021.24.5.467

A Study on the Shape Selection of Mechanical Fastening for the Repair of Fighter Wing  

Choi, Dongsu (Department of Aerospace Engineering, Air Force Academy)
Publication Information
Journal of the Korea Institute of Military Science and Technology / v.24, no.5, 2021 , pp. 467-474 More about this Journal
Abstract
A study on optimal shape selection of a mechanical fastening for the repair of crack defect of ROK Air Force F-5 fighter wing was conducted. The crack defect occurred in the spar of the wing, and the technical manual does not specify the repair method. However, ROK Air Force decided to develop a repair technology for this defect in consideration of various logistic conditions. Three repair shapes for the proper repair were devised and the finite element analysis was performed to examine the structural safety of these three connection members. As a result of the structural safety review, two connection members except one were structurally safe with safety margins over zero because the calculated stress values were at or below the yield strength level. Therefore, two connection members were determined to be able to use for repair under the condition that the aircraft operated within the design limit load. The results of this study would be very useful if the same defect occurs in long-term aircraft operated by the ROK Air Force.
Keywords
Structural Safety; DLL/DUL; Finite Element Analysis; von-Mises/Bearing Stress; Margin of Safety;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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