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http://dx.doi.org/10.5762/KAIS.2020.21.7.162

Fatigue Analysis of External Fuel Tank and Pylon for Fixed Wing Aircraft  

Kim, Hyun-Gi (Korea Aerospace Research Institute)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.21, no.7, 2020 , pp. 162-167 More about this Journal
Abstract
In this study, a fatigue analysis of an external fuel tank and pylon for fixed-wing aircraft was carried out as part of the domestic development of fixed-wing aircraft. Through structural analysis, the analysis areas were selected, and the transfer function for unit loads was established in the selected parts. For each of the continuous load profiles, stress components in the selected areas were calculated using the load of each profile and the transfer function, and the Von Mises equivalent stress was employed as the representative stress of each profile. In addition, the rainflow counting technique was used to extract individual profiles obtained from the initial large load profiles and to calculate their amplitude and average values. For life evaluation, the S-N diagram of the Metallic Materials Properties Development and Standardization (MMPDS) was applied, and the damage value was calculated by Miner's rule to assess the life of the selected area. As a result of the life assessment, the life span requirement for the selected area of the external fuel tank and the pylon was assessed as being satisfied.
Keywords
External Fuel Tank(EFT); Fatigue Analysis; MMPDS(Metallic Materials Properties Development and Standardization); Pylon; Rainflow Counting Method;
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