Proceedings of the KSME Conference (대한기계학회:학술대회논문집)

The Korean Society of Mechanical Engineers (대한기계학회)
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A Study on the Adhesive Properties of Lightweight Primary Mirror

대구경 주반사경의 접착 특성에 관한 연구

  • 김현중 (한국과학기술원 기계공학과) ;
  • 서유덕 (한국과학기술원 기계공학과) ;
  • 박상훈 (한국과학기술원 기계공학과) ;
  • 윤성기 (한국과학기술원 기계공학과) ;
  • 이승훈 (한국항공우주연구원 광학탑재체 그룹) ;
  • 이덕규 (한국항공우주연구원 광학탑재체 그룹) ;
  • 이응식 (한국항공우주연구원 광학탑재체 그룹)
  • Published : 2007.05.30
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Abstract

The optical performance of the mirror for satellite camera is highly dependent on the adhesive properties between the mirror and its support. In order to design a mirror with high optical performance, the mechanical properties of adhesives should be well defined. In this research, the mechanical properties of three kinds of space adhesives are studied. In case of the materials which show nearly incompressible behavior such as space adhesives, it is important to measure shear modulus which governs deviatoric stress components. Shear moduli of the adhesives are determined by using single lap adhesively bonded joint. For the shear tests, several points have been selected from $-20^{\circ}C$ to $50^{\circ}C$ which is operating temperature range of the adhesive. The shear modulus of each adhesive is expressed as a function of temperature. Characteristics of the adhesives are discussed regarding their temperature sensitivity. The analysis results of RMS wavefront error w.r.t shear modulus are presented.

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