Journal of the Computational Structural Engineering Institute of Korea (한국전산구조공학회논문집)

Computational Structural Engineering Institute of Korea (한국전산구조공학회)
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Thermal Residual Stresses and Spring back Effects on the Frequency Selective Surface Embedded Composite Laminates

주파수 선택막이 삽입된 복합재 평판의 잔류 열응력과 스프링 백 효과

  • Park, Kyoung-Mi (School of Mechanical Engineering, Yonsei University) ;
  • Seo, Yun-Seok (School of Mechanical Engineering, Yonsei University) ;
  • Chun, Heoung-Jae (School of Mechanical Engineering, Yonsei University) ;
  • Hong, Ic-Pyo (School of Information Communication Engineering, Kongju National University) ;
  • Park, Yong-Bae (School of Electrical and Computer Engineering, Ajoo University) ;
  • Kim, Yun-Jae (Agency for defense development)
  • Received : 2013.11.04
  • Accepted : 2013.12.02
  • Published : 2013.12.31
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Abstract

The residual stresses occur in the Frequency Selective Surface(FSS) embedded hybrid composite structures after co-curing due to mismatch among the coefficient of thermal expansions and stiffness values between the FSS and composite materials. The spring backs occur due to these residual stresses. Therefore, in this paper, the spring-backs caused by residual stresses in FSS embedded composite structures were studied with considering effect of symmetric and unsymmetric stacking sequence of composite laminates.

복합재료 사이에 주파수 선택적 투과막(Frequency Selective Surface)을 삽입하여 동시경화 공정을 이용하여 주파수 선택적 투과 기능을 가지는 하이브리드 복합재료를 성형하면 재료들 간의 열팽창 계수와 강성의 차이로 인해 구조 내에 잔류 열응력이 발생하게 되고, 이로 인하여 스프링 백 현상이 발생한다. 따라서 복합재의 적층에 따른 영향을 알아보기 위해 복합재료의 적층각을 선택적 투과막(Frequency Selective Surface)을 중심으로 대칭과 비대칭 적층으로 적용하여 하이브리드 구조의 잔류 열응력을 예측하고, 이에 대한 스프링 백에 대해서 연구하였다.

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References

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