Kyung-Hee Choi*, Yeon-Taek Hwang*, Hee-June
Kim**, Hak-Sung Kim*,***†
* Department of Mechanical Engineering, Hanyang University
** Composite Materials & Components R&D Center, LG Hausys
***† Institute of Nano Science and Technology, Hanyang University
최경희* · 황연택* · 김희준** · 김학성*,***†
As the use of composite materials of woven structure
has expanded to various fields such as automobile and aviation industry, there
has been a need for reliability problems and prediction of mechanical
properties of woven composites. In this study, finite element analysis for
predicting the mechanical properties of composite materials with different
weaving structures was conducted to verify similarity with experimental static
properties and an effective modeling method was developed. To reflect the
characteristics of the weave structure, the meso-scale representative volume
element (RVE) was used in modeling. Three-dimensional modeling was carried out
by separating the yarn and the pure matrix. Hashin’s failure
criterion was used to determine whether the element was failed, and the
simulation model used a progressive failure model which was suitable for the
composite material. Finally, the accordance of the modeling and simulation
technique was verified by successfully predicting the mechanical properties of
the composite material according to the weave structure.
직조 구조의 복합재의 쓰임이 자동차, 항공 산업 등 여러 분야로 확장됨에 따라, 직조 복합재의 신뢰성 문제 및 물성예측에 대한 필요성이 대두되었다. 본 연구에서는 직조 구조가 다른 복합재료의 물성 예측을 위한 유한요소해석을 수행하여 실험으로 얻은 정적 물성과의 유사성을 검증하였고, 효과적인 모델링 방법을 개발하였다. 직조 구조의 특성을 반영하기 위하여 모델링은 메소 스케일의 대표 체적 요소(RVE)를 이용하였다. 섬유 다발과 순수 기지를 분리하여 3차원 모델링을 진행하였다. 하신 파괴 기준(Hashin’s failure criteria)을 적용하여 요소의 파괴 유무를 판단하였고, 해석 모델은 복합재에 적합한 점진적 파괴 모델을 사용하였다. 최종적으로, 직조 구조에 따른 복합재의 물성을 성공적으로 예측하여 본 모델링 및 해석 기법에 대한 적합성을 검증하였다.
Keywords: 직조복합재(Woven composite), 대표 체적 요소(RVE), 점진적 파괴 모델(Progressive failure model), 굴곡 각도(Crimp angle)
2019; 32(5): 206-210
Published on Oct 31, 2019
* Department of Mechanical Engineering, Hanyang University
***† Institute of Nano Science and Technology, Hanyang University