Journal of Aerospace System Engineering (항공우주시스템공학회지)

The Society for Aerospace System Engineering (항공우주시스템공학회)
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Geometric Modeling of the Skin-Stringer Integrated Panel with Three-Dimensional Woven Composite

3차원 직조 복합재료 스킨-스트링거 일체형 패널의 기하학적 모델링

  • Yeonhi, Kim (Graduate School of Aerospace and Mechanical Engineering, Korea Aerospace University) ;
  • Hiyeop, Kim (Graduate School of Aerospace and Mechanical Engineering, Korea Aerospace University) ;
  • Jungsun, Park (School of Aerospace and Mechanical Engineering, Korea Aerospace University) ;
  • Joonhyung, Byun (Composite Research Division, Korea Institute of Materials Science)
  • 김연희 (한국항공대학교 대학원 항공우주 및 기계공학과) ;
  • 김휘엽 (한국항공대학교 대학원 항공우주 및 기계공학과) ;
  • 박정선 (한국항공대학교 항공우주 및 기계공학부) ;
  • 변준형 (한국재료연구원 복합재료연구본부)
  • Received : 2022.07.29
  • Accepted : 2022.11.09
  • Published : 2022.12.31
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Abstract

This paper presents a novel geometric modeling technique to predict the mechanical properties of an aircraft wing's skin-stringer integrated panel. Due to mechanical and adhesive fastening, this panel is vulnerable to stress concentration and debonding, so we designed it to integrate the skin and stringer using three-dimensional woven composites. Geometric modeling was conducted by measuring the geometric parameters of the specimen and defining the pattern of the yarns as functions. We used a weighted average model with iso-strain and iso-stress assumptions to predict the mechanical properties of the panel parts. We then compared the results of a finite element analysis with a compression test to verify the accuracy of our model. Our proposed technique proved to be more efficient than the traditional experimental method for predicting the mechanical properties of skin-stringer integrated panels.

항공기 날개에 사용되는 스킨-스트링거 패널은 기계적 체결과 접착 체결로 인하여 응력 집중과 접착 분리가 발생할 수 있다. 이를 고려하여, 3차원 직조 복합재료를 이용해 스킨과 스트링거를 일체시킨 패널을 설계하였다. 본 논문에서는 일체형 패널의 기계적 물성을 예측하기 위하여 기하학적 모델링 기법을 제안하였다. 시편의 기하학적 변수를 측정하고 섬유 다발의 패턴을 함수식으로 정의해 기하학적 모델링을 수행하였다. 이를 검증하기 위하여 iso-strain, iso-stress 가정을 사용한 가중평균모델을 통해 각 부재의 기계적 물성을 예측하고 유한요소해석을 수행해 압축시험 결과와 비교하였다. 제안한 기하학적 모델링 기법을 통해 스킨-스트링거 일체형 패널의 기계적 물성을 실험적 방법보다 효율적으로 예측하였다.

Keywords

Acknowledgement

이 논문은 2022년도 정부(교육부)의 재원으로 한국연구재단의 지원을 받아 수행된 기초연구사업임 (과제 번호: 2022R1A6A1A03056784)

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