Progress in Superconductivity and Cryogenics (한국초전도ㆍ저온공학회논문지)

The Korean Society of Superconductivity and Cryogenics (한국초전도저온학회)
권호 표지
DOI QR코드

DOI QR Code

Calibration of Strain Gauge for Thermal Expansion Coefficientof Fiber Reinforced Composites at Cryogenic Temperature

극저온 환경에서의 섬유강화 복합재료의 열팽창 계수 측정을 위한스트레인 게이지의 보정에 관한 연구

  • 이원오 (한국기계연구원 부설 재료연구소) ;
  • 이상복 (한국기계연구원 부설 재료연구소) ;
  • 이진우 (한국기계연구원 부설 재료연구소) ;
  • 엄문광 (한국기계연구원 부설 재료연구소)
  • Received : 2010.08.03
  • Accepted : 2010.09.05
  • Published : 2010.09.30
Download PDF
⟨ Previous Next ⟩

Abstract

Since the fiber reinforced polymeric (FRP) composites are considered in next generation of space transportation systems, reliable thermal expansion properties should be well provided for structural design of composite materials. To obtain accurate mechanical behaviors at a cryogenic temperature, precise strain measurement and calibration must be provided. In this work, apparent strains (or thermal output) of temperature self-compensated strain gages were deliberately investigated for epoxy, CTBN modified epoxy and carbon fabric composite system from room temperature to liquid nitrogen temperature. Also, fourth-order thermal output curves were presented for the further calibration. The results showed that the thermal output is heavily dependent on test materials and a large amount of apparent strains were observed for the polymer resins.

Keywords

References

  1. 김명곤, 강상국, 김천곤, 공철원, "극저온 환경에서 탄소섬유강화 복합재료의 수지 조성 변화에 따른 인장 물성 측정" 한국복합재료학회지, 제 20권, 제4호, pp. 1-8. 2007.
  2. S. Kanagaraj, S. Pattanayak, "Measurement of the thermal expansion of metal and FRPs", Cryogenics, Vol. 43, No.7, pp. 399-342, 2003. https://doi.org/10.1016/S0011-2275(03)00096-1
  3. F. Lanza di Scalea, "Measurement of thermal expansion coefficients of composite using strain gages", Experimental mechanics, Vol. 38, No.4, pp. 233-241, 1998. https://doi.org/10.1007/BF02410384
  4. 주진원, 김갑순. "극저온 환경에서 스트레인 게이지의 겉보기 변형률 특성에 관한 연구". 대한기계학회논문집, 제 16권, 제 6호, pp. 1099-1107, 1992.
  5. K. Matthew, H. Kowalkowski, W. Kevin River and Russel, Thermal Output of WK-Type Strain Gauges on Various Materials at Cryogenic and Elevated Temperatures, NASA/TM-1998-208739, 1998.
  6. C. Ferrero, "Stress analysis down to liquid helium temperature", Cryogenics, Vol. 30, No.3, pp. 249-254, 1990. https://doi.org/10.1016/0011-2275(90)90086-R
  7. 김주식, 윤광준. "탄소섬유 복합재료의 온도변화에 대한 열팽창계수 특성 변화 규명". 한국복합재료학회지, 제12권, 제6호, pp. 1-7, 1999.
  8. G. Hartwig, "Thermal expansion of fibre composites", Cryogenics, Vol. 28, No.4, pp. 255-266, 1998.
  9. A. Kaufman, "Investigation of Strain Gages for Use at Cryogenic Temperatures", Experimental Mechanics, Vol. 3, No.8, pp. 177-183, 1963. https://doi.org/10.1007/BF02325791
  10. BS 6888: 1988, "Methods for Calibration of Bonded Electrical Resistance Strain Gauges", 1998.
  11. ASTM E251-92, "Standard Test Methods for Performance Characteristics of Metallic Bonded Resistance Strain Gages", 2009.
  12. C. Ferrero, C. Marinari and E. Martino, "Calibration systems for strain gauges to be used at cryogenic temperatures", Sensors and Actuators A, Vol. 31, pp. 125-129, 1992. https://doi.org/10.1016/0924-4247(92)80091-G