Composites Research

The Korean Society for Composite Materials (한국복합재료학회)
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Prediction of Fatigue Life for Composite Rotor Blade of Multipurpose Helicopter Using Strength Degradation Model

강도저하모델을 이용한 다목적헬리콥터용 복합재로터깃 피로수명예측

  • 권정호 (울산대학교 수송시스템공학부) ;
  • 서창원 (울산대학교 대학원 항공우주공학과)
  • Published : 2001.04.01
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Abstract

The predictions of residual strength evolution and fatigue life of full scale composite rotor blade for multipurpose helicopter were studied using a strength degradation model. Flight-by-flight load spectrum was developed on the basis of FELIX standard spectrum data. The laminated structural analysis was also performed to obtain corresponding local stress and/or strain spectra for each ply of laminate skin and glass roving spar structures around the blade root where fatigue damage was severely anticipated.

다목적헬리콥터용으로 설계된 복합재 무힌지 로터깃에 대하여 강도저하모델을 활용하여 비행모사 하중스펙트럼에 따라 피로파손 확률분포와 잔여강도 변화거동을 해석하여 피로수명을 예측하였다. 이때 작용하는 피로하중은 실제 헬리콥터 운용상태를 모사하는 무힌지 로터깃의 표준하중스펙트럼인 FELIX 데이터로부터 비행 대 비행 하중스펙트럼을 구성하였고 피로손상이 가장 극심하게 예상되는 깃뿌리 부근의 국부응력스펙트럼은 스킨과 스파의 적층구조해석을 수행함으로써 구하였다.

Keywords

References

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