Composites Research

The Korean Society for Composite Materials (한국복합재료학회)
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A Study on the Improvement of Bending Characteristics of 3D Printed Thermoplastic Structures Reinforced at the Lateral Surface using Continuous Fiber Reinforced Thermosetting Composites

열경화성 연속섬유 복합재를 이용해 외측 보강된 3D 프린팅 열가소성 복합재 구조물의 굽힘 특성 향상에 대한 연구

  • Baek, Un-Gyeong (Gumi Electronics & Information Technology Research Institute (GERI), Innovative Technology Research Division) ;
  • Nam, Gibeop (Kumoh National Institute of Technology, Advanced Material Research Center) ;
  • Roh, Jae-Seung (Kumoh National Institute of Technology, School of Materials Science and Engineering) ;
  • Park, Sung-Eun (Gumi Electronics & Information Technology Research Institute (GERI), Innovative Technology Research Division) ;
  • Roh, Jeong-U (Gumi Electronics & Information Technology Research Institute (GERI), Innovative Technology Research Division)
  • Received : 2021.04.07
  • Accepted : 2021.04.21
  • Published : 2021.04.30
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Abstract

3D printing technology has the advantage of easy to make various shapes of products without a mold. However, it has a problem such as mechanical properties vary greatly depending on materials and manufacturing conditions. Thus, the need for research of 3D printing technology on ways to reduce manufacturing cost compared to physical properties is increasing. In this study, a 3D printing thermoplastic structure was fabricated using short fiber carbon fiber reinforced nylon filaments. And a method of improving mechanical properties was proposed by reinforcing the outer surface using pultruded continuous fiber-type carbon fiber or glass fiber-reinforced thermosetting composite material. It was confirmed that the bending properties were improved according to the reinforcing position of the stiffener and the type of fiber in the stiffener.

3D 프린팅 기술은 금형이 없이 다양한 형태의 제품을 만들기 쉬운 장점이 있지만, 기존 보편화된 성형법에 비해 기계적 물성이 낮고, 소재 및 제작 조건 등에 따라 기계적 물성이 크게 달라지는 문제가 있다. 한편, 높은 물성을 구현하기 위해서는 제조비용이 높아지는 문제가 있어, 이에 대한 연구 필요성이 증가하고 있다. 본 연구에서는 단섬유 탄소섬유 보강 나일론 필라멘트를 이용하여 3D 프린팅 열가소성 구조물을 제작하였다. 또한 인발 성형된 연속섬유 형태의 탄소섬유 혹은 유리섬유 강화 열경화성 복합재를 이용해 외측면을 보강하여 기계적 물성 향상 방법을 제시하였다. 보강재의 보강 위치와 섬유의 종류에 따른 굽힘물성 향상을 확인하였다.

Keywords

References

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