A Study on the Elevator Spar Improvement for the Operating Aircraft

Shim, Daisung; Kim, Mantae; Yeom, Hyowon; Im, Dongmin; Kim, Youngjin; Uhm, Wonseop

doi:2016.19.6.675

J. KIMS Technol > Volume 19(6); 2016 > Article

Journal of the Korea Institute of Military Science and Technology 2016;19(6):675-680.
DOI: https://doi.org/10.9766/KIMST.2016.19.6.675

A Study on the Elevator Spar Improvement for the Operating Aircraft

Daisung Shim, Mantae Kim, Hyowon Yeom, Dongmin Im, Youngjin Kim, Wonseop Uhm

¹Sacheon Center, Defense Agency for Technology and Quality
²Airframe Analysis Team, Korea Aerospace Industries, Ltd.

장기 운영항공기 승강타 날개보 구조개선 연구

심대성, 김만태, 염효원, 임동민, 김영진, 엄원섭

¹국방기술품질원 사천센터
²한국항공우주산업(주) 고정익해석팀

Abstract

This is a study for the improvement of the defected elevator spar in operating aircraft. The elevator spar web holes were analyzed to find out the cause of the cracks. The fatigue striations were observed and the cracks occurred by the repetitive stresses during the elevator works. Also the outboard connection structure of the elevator and horizontal stabilizer was more weak shape than the inboard. The design changes were recommended and the analyses were performed to verify the improvement of the changed shapes.

Key Words: Elevator Spar Web, Fatigue Striation, Design Change, One-piece Lug