Composites Research

The Korean Society for Composite Materials (한국복합재료학회)
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The Effect of the Fiber Volume Fraction Non-uniformity and Resin Rich Layer on the Rib Stiffness Behavior of Composite Lattice Structures

섬유체적비 불균일 및 수지응집층이 복합재 격자 구조체 리브의 강성도 거동에 미치는 영향

  • Kang, Min-Song (Department of Aerospace Engineering, Chung-Nam National University) ;
  • Jeon, Min-Hyeok (Department of Aerospace Engineering, Chung-Nam National University) ;
  • Kim, In-Gul (Department of Aerospace Engineering, Chung-Nam National University) ;
  • Kim, Mun-Guk (Department of Aerospace Engineering, Chung-Nam National University) ;
  • Go, Eun-Su (Department of Aerospace Engineering, Chung-Nam National University) ;
  • Lee, Sang-Woo (Defense and Aerospace Division, Hankuk Fiber Group)
  • Received : 2018.04.13
  • Accepted : 2018.08.27
  • Published : 2018.08.31
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Abstract

Cylindrical composite lattice structures are manufactured by filament winding process. The fiber volume fraction non-uniformity and resin rich layers that can occur in the manufacturing process affect the stiffness and strength of the structure. Through the cross-section examination of the hoop and helical ribs, which are major elements of the composite lattice structure, we observed the fiber volume fraction non-uniformity and resin rich layers. Based on the results of the cross-section examination, the stiffness of the ribs was analyzed through the experimental and theoretical approaches. The results show that the fiber volume fraction non-uniformity and resin rich layers have an obvious influence on the rib stiffness of composite lattice structure.

원통형 복합재 격자 구조체는 필라멘트 와인딩 기법으로 제작되며 제작 공정에서 발생할 수 있는 섬유체적비 불균일과 수지응집층은 구조체의 강성도 및 강도에 영향을 줄 수 있다. 구조체의 주요 요소인 후프 및 헬리컬 리브의 단면 분석을 통해 섬유체적비 불균일 및 수지응집층의 존재 여부를 확인하였으며, 단면 분석 결과를 바탕으로 후프 및 헬리컬 리브에 대한 실험 및 이론적 접근을 통해 섬유체적비 불균일 및 수지응집층이 리브 요소의 강성도에 미치는 영향을 분석하였다. 섬유체적비 불균일이 후프 리브의 굽힘 거동에 영향을 미치는 것을 확인하였으며 헬리컬 리브의 경우 섬유체적비 불균일 및 수지응집층에 의해 강성도에 변화가 있음을 확인하였다.

Keywords

References

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