Original Article
  • Study on Mechanical Properties of CFRP Composite Orthogonal Grid Structure
  • Sang Min Baek, Sung June Lim, Min Sung Kim, Myung Gyun Ko, Chan Yik Park
  • Agency for Defense Development, Agency for Defense Development, Corresponding author, Department of Weapon System Engineering, Science and Technology University
  • CFRP 복합재료 직교 격자 구조의 기계적 특성 연구
  • 백상민, 임성준, 김민성, 고명균, 박찬익
Abstract
In this study, a grid panel structure in which the woven CFRP composites were stacked in the orthogonal array was proposed and the mechanical properties were analyzed and studied. The grid parts were fabricated by cutting prepregs and laminating them. The grid panel structure was fabricated by co-curing with lower laminate plate in auto-clave process. The behavior of the proposed grid panel structure was evaluated by tests under tensile, compressive, shear, and bending loads. The effect of increasing the stiffness of the orthogonal grid structure was verified through these tests. In addition, the finite element model was constructed and compared with the test results, confirming the validity and reliability of the test and analysis.

본 연구에서는 직물 탄소섬유강화플라스틱 복합재를 직교 격자 형상으로 적층한 패널 구조를 제안하고, 기계적 특성에 대한 분석 및 연구를 수행하였다. 프리프레그를 재단하여 적층하는 방식으로 직교 격자 구조를 제 작하였으며, 하부의 적층판과 오토클레이브 공정 일체 성형을 통해 격자 패널 구조를 제작하였다. 본 연구에서는 인장, 압축, 전단, 굽힘 하중을 부가하여 제안된 격자 패널 구조의 거동을 확인하였으며, 이러한 시험을 통해 본 직 교 격자 구조물의 강성 증가 효과를 입증하였다. 또한, 유한요소해석 모델을 구축하여 시험 결과와 비교하였으며, 이를 통해 시험과 해석의 타당성을 확인하였다.

Keywords: Grid panel structure, Orthogonal grid, Composite, CFRP, Carbon Fiber Reinforced Plastic, Curvature structure

Keywords: 격자 패널 구조, 직교 격자, 복합재료, 탄소섬유강화 플라스틱, 곡률 구조물

This Article

  • 2018; 31(2): 69-75

    Published on Apr 30, 2018

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