Journal of the Korea Institute of Military Science and Technology (한국군사과학기술학회지)

The Korea Institute of Military Science and Technology (한국군사과학기술학회)
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A Study of the Lug Fracture Improvement for Composite Leaf Spring Landing Gear

판스프링방식 착륙장치의 러그파손 개선 연구

  • Shim, Daisung (Sacheon Center, Defense Agency for Technology and Quality) ;
  • Jang, Deakhyeon (UAV Team, Korea Aerospace Industries, Ltd.) ;
  • Park, Chahwan (Policy Planning Department, Defense Agency for Technology and Quality) ;
  • Kim, Jounghun (Sacheon Center, Defense Agency for Technology and Quality)
  • 심대성 (국방기술품질원 사천센터) ;
  • 장덕현 (한국항공우주산업(주) UAV팀) ;
  • 박차환 (국방기술품질원 정책기획실) ;
  • 김정훈 (국방기술품질원 사천센터)
  • Received : 2015.03.13
  • Accepted : 2015.07.24
  • Published : 2015.08.05
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Abstract

This is a study for the improvement of the fractured lug structure that connects the landing gear to the fuselage of the aircraft using the composite leaf spring landing gear. The lug surface was analyzed to find out the cause of fracture. The lug was destroyed by the crack initiation and propagation under the repeated stresses. The frictional wears of the lug structure were proceeded and that affected adversely to the crack. Also, the square protrusion of the lug has a weak shape to bring about stress concentration. The design changes were conducted and the test was performed to verify changed design results.

Keywords

References

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