Journal of the Korean Society for Aeronautical & Space Sciences (한국항공우주학회지)

The Korean Society for Aeronautical and Space Sciences (한국항공우주학회)
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Fatigue Analysis to Determine the Repair Limit for the Damaged Fastener Hole of Aging Aircraft(P-3CK)

노후항공기(P-3CK) 패스너 홀 손상 수리 한계 설정을 위한 피로해석

  • Kim, Young-Jin (Sacheon Regional Center, Defense Agency for Technology and Quality) ;
  • Kim, Hyeung-Geun (Sacheon Regional Center, Defense Agency for Technology and Quality) ;
  • Kim, Chang-Young (Sacheon Regional Center, Defense Agency for Technology and Quality) ;
  • Chang, Joong-Jin (Sacheon Regional Center, Defense Agency for Technology and Quality) ;
  • Lee, Mal-Young (Sacheon Regional Center, Defense Agency for Technology and Quality)
  • Received : 2013.08.09
  • Accepted : 2013.11.12
  • Published : 2013.12.01
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Abstract

In this study, based on P-3CK project using aging aircraft without any design information, the structural assessments of fastener holes to repair the short edge distance defects are investigated. For this purpose, the nacelle longeron which has many defects is selected and then conservative stress is calculated by performing the static analysis of 1.5ED, 1.8ED, 2.0ED defects of longeron fastener holes. This result applies to TWIST standard load spectrum to generate flight load spectrum. Then the crack growth analysis is performed by using flight load spectrum. Through this, the validity of a repaired fastener hole is evaluated. Finally, the standard of repair and the period of maintenance for a defected fastener hole are established.

이 논문에서는 설계정보가 없는 노후 항공기를 사용한 P-3CK 해상초계기 사업을 바탕으로, 끝단거리 부족 결함 수리를 위한 패스너 홀 구조특성 연구를 수행하였다. 이를 위해 끝단거리 결함이 많이 발생했던 낫셀 론저론 부분을 선택하고, 1.5, 1.8, 2.0배 끝단거리에 대한 정적 해석을 수행하여 보수적인 응력을 구하였다. 이 응력을 바탕으로 TWIST의 표준하중 스펙트럼을 적용하여 비행하중을 생성하고, 이 비행하중을 이용하여 균열성장 피로해석을 수행하였다. 이 결과를 통하여 P-3CK 사업 중 수리된 패스너 홀의 유효성을 평가하고 정비주기 및 기준을 설정하였다.

Keywords

References

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