Composites Research

The Korean Society for Composite Materials (한국복합재료학회)
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Stiffness Prediction of Spatially Reinforced Composites

공간적으로 보강된 복합재료의 강성예측

  • 유재석 (한국항공우주연구원 발사체 기술실 구조그룹) ;
  • 장영순 (한국항공우주연구원 발사체 기술실 구조그룹) ;
  • 이상의 (한국과학기술원 기계공학과 항공우주공학전공) ;
  • 김천곤 (한국과학기술원 기계공학과 항공우주공학전공)
  • Published : 2004.10.01
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Abstract

In this study, the stiffness of spatially reinforced composites (SRC) are predicted by using superposition of a rod and matrix stiffnesses in an arbitrary direction. To confirm the predicted values, the material properties of SRC are measured. The predicted values from the volume average of stiffness matrix are consistent with the tested values in a rod direction, but are inconsistent in an off-rod direction while reverse is true fur the volume average of compliance matrix. Therefore, the harmony function from superposition of stiffness and compliance matrix is introduced. The predicted values from the harmony function are consistent with the tested values in both the rod and the off-rod directions.

본 연구에서는 라드와 기지의 강성행렬의 중첩을 통해서 임의의 방향에서 공간적으로 보강된 복합재(SRC)의 강성을 예측하였다. 예측치를 실험과 비교하기 위하여 SRC의 물성치를 측정하였다. 라드방향에서는 강성행렬의 중첩을 통해서 예측된 물성치가 실험치와 일치하였고, 라드에서 벗어난 방향에서는 연성행렬의 중첩을 통해서 예측된 물성치가 실험치와 비교적 일치하였다. 이런 이유로 강성행렬과 연성행렬의 중첩을 공간적으로 조합한 물성치 조화함수를 이용하여, SRC의 모든 방향에서 물성치를 예측하였다. 이러한 물성치 조화함수를 이용한 결과, 예측치와 실험치가 라드방향과 라드에서 벗어난 방향 모두에서 일치하였다

Keywords

References

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