Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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A Study on the Shear Characteristics of Adhesives in Primary Mirror Supports of Satellite Camera

인공위성 카메라 주반사경 지지부에 적용되는 접착제의 전단 특성 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 : 2007.07.01
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Abstract

The optical performance of the mirror fur satellite camera is highly dependent on the adhesive properties between the mirror and its support. Therefore, 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. Also the experiment should be performed in circumstances similar to real manufacturing process of mirror, because extra factors such as size effects, the adhesion effects of primer and reactions between adhesive and primer affect the properties of adhesive regions. In this research shear moduli of the adhesives are determined by using a single lap adhesively bonded joint. For the shear tests, several temperatures have been selected from $-20^{\circ}C$ to $55^{\circ}C$ which is operating temperature range of the adhesive. In the case of linear behavior materials, shear moduli are calculated through a linear curve fitting. Shear stress-strain relation is obtained by using an exponential curve fitting for material which shows non-linear behavior. The shear modulus of each adhesive is expressed as a function of temperature. Characteristics and adaptability of the adhesives are discussed regarding their temperature sensitivity.

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References

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