Composites Research

The Korean Society for Composite Materials (한국복합재료학회)
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Thermal Residual Stresses in the Frequency Selective Surface Embedded Composite Structures and Design of Frequency Selective Surface

주파수 선택적 투과막이 결합된 복합재료의 잔류응력평가 및 선택적 투과막 설계

  • 김가연 (연세대학교 기계공학과 대학원) ;
  • 전흥재 (연세대학교 기계공학과 대학원) ;
  • 강경탁 (연세대학교 기계공학과 대학원) ;
  • 이경원 (연세대학교 전기전자공학과) ;
  • 홍익표 (국립공주대학교 정보통신공학부) ;
  • 이명건 (국방과학연구소)
  • Published : 2011.02.28
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Abstract

In this paper, Particle Swarm Optimization(PSO) is applied to the design of the Frequency Selective Surface(FSS) and residual stresses of hybrid radome is predicted. An equivalent circuit model with Square Loops arrays was derived and then PSO was applied for acquiring the optimized geometrical parameters with proper resonant frequency. Residual stresses occur in the FSS embedded composite structures after cocuring and have a great influence on the strength of the FSS embedded composite structures. They also effect transmission quality because of delamination. Therefore, the thermal residual stresses of FSS embedded composite structures were analyzed using finite element analysis with considering the effects of FSS pattern, and composite stacking sequence.

본 연구에서는 최적화 알고리즘 중 하나인 PSO기법을 이용하여 주파수 선택적 표면을 설계하였으며, 설계된 주파수 선택구조를 적용한 하이브리드 레이돔의 잔류응력을 예측하였다. 주파수 선택 구조로서 Square Loop의 등가회로모델에 PSO를 적용하여, K-band(23GHz)에서 차단특성을 갖는 최적의 설계값을 구하였다. 또한 FSS와 복합재료의 하이브리드 레이돔을 제작할 때 발생하는 잔류응력의 효과가 클 경우 구조적 안정성이 떨어질 뿐만 아니라 층간분리가 발생하여 FSS의 전파투과특성에 영향을 미칠 수 있으므로, 하이브리드 레이돔의 제작 시에 동시경화 후 상온으로 냉각되는 과정에서 발생하는 잔류 열응력에 대하여 예측하였으며, FSS패턴과 복합재료의 적층각 변화에 따른 영향을 비교하였다.

Keywords

References

  1. Mittra, R., Chan, C.H. and Cwik T., "Techniques for analyzing frequency selective surfaces-A review," Proceedings of the IEEE, Vol. 76, No. 12, 1988, pp. 1593-1615. https://doi.org/10.1109/5.16352
  2. Grounds, P.W. and Webb, K.J., "Numerical analysis of finite frequency selective surface with rectangular patches of various aspect ratios," IEEE Transactions on Antennas and Propagation, Vol. 39, 1991, pp. 569-575. https://doi.org/10.1109/8.81482
  3. Wu, T.K., Frequency selective surface and grid array, Wiley, New York. 1995.
  4. Kim, P.C., Chin, W.S., Lee, D.G. and Seo, I.S., "EM Characteristics of the RAS Composed of E-Glass/Epoxy Composite and Single Dipole FSS Element," Journal of Composite Materials, Vol. 75, 2006, pp. 601-609.
  5. Kim, P.C. and Lee, D.G., "Improvement of Bonding Characteristics Between the Frequency Selective Surface and E-glass/epoxy Composite," Journal of Adhesion Science and Technology, Vol. 23, 2009, pp. 215-227. https://doi.org/10.1163/156856108X369570
  6. Marcuvitz, N., Waveguide Handbook, McGraw-Hill, New York, 1951.
  7. Anderson I., "On the Theory of Self-Resonant Grids," Bell system Technical Journal, Vol. 54, 1975, p. 1725-1731. https://doi.org/10.1002/j.1538-7305.1975.tb03551.x
  8. Langley, R. J., Drinkwater, A. J., "An Improved Empirical Model for the Jerusalem Cross," IEE Proceedings H-Microwaves Optics and Antennas, Vol. 129, No. 1, 1982, pp. 1-6. https://doi.org/10.1049/ip-h-1.1982.0001
  9. Langley, R. J., Parker, E. A., "Equivalent Circuit Model for Arrays of Square Loops," Electronics Letters, Vol. 18, No. 7, 1982, pp. 294-296. https://doi.org/10.1049/el:19820201
  10. Langley, R. J., Parker, E. A., "Double Square Frequency Selective Surfaces and Their Equivalent Circuit.," Electronics Letters, Vol. 19, No. 17, 1983, pp. 675-677. https://doi.org/10.1049/el:19830460
  11. Lee, C. K., Langley, R. J., "Equivalent- Circuit Models for Frequency Selective Surfaces at Oblique Angles of Incidence," IEE Proceedings H-Microwaves Optics and Antennas, Vol. 132, 1985, pp. 395-399. https://doi.org/10.1049/ip-h-2.1985.0070
  12. Parker, E. A., "The Gentleman's Guide to Frequency Selective Surfaces," Presented in 17th Q.M.W. Antenna Symposium, London (UK), 1991.
  13. 서일성, 김진규, 최일, 이대길, "Hybrid 구조의 FSS 접합 특성 영향," 한국군사과학기술학회 2010년 종합학술대회학회지, 2010, pp. 581-584.
  14. Munk, B.A., (2000), Frequency Selective Surfaces: Theory and Design, John Wiley & Sons, Inc., New York, 2000.
  15. Lee, C.K. and Langley, R.J., "Equivalent-Circuit Models for Frequency Selective Surfaces at Oblique Angles of Incidence," IEE Proceedings H Microwaves, Vol. 132, 1985, pp. 395-399. https://doi.org/10.1049/ip-h-2.1985.0070
  16. Parker, E.A., "The Gentleman's Guide to Frequency Selective Surfaces," 17th QMW Antenna Symposium, London(UK), 1991.
  17. 김가연, 전흥재, 홍익표, 강경탁, 이명건, "주파수 선택적 투과막이 결합된 복합재료의 잔류응력평가," 국방과학연구소 창설 40주년기념 종합 학술대회 학회지, 2010.

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  1. Thermal Residual Stresses and Spring back Effects on the Frequency Selective Surface Embedded Composite Laminates vol.26, pp.6, 2013, https://doi.org/10.7734/COSEIK.2013.26.6.475