Journal of the Korean Society for Aeronautical & Space Sciences (한국항공우주학회지)

The Korean Society for Aeronautical and Space Sciences (한국항공우주학회)
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Thermal Deformation Measurement of Notched Structure Using Global-local Multi-DIC System

전역-국부 다중 DIC 시스템을 이용한 노치 구조물의 열변형 계측

  • Xin, Ruihai (Department of Aerospace Information Engineering, Konkuk University) ;
  • Doan, Nguyen Vu (Department of Aerospace Information Engineering, Konkuk University) ;
  • Goo, Nam Seo (Department of Aerospace Information Engineering, Konkuk University)
  • Received : 2021.01.28
  • Accepted : 2021.06.17
  • Published : 2021.08.01
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Abstract

During supersonic flight of vehicles, the thermal behavior of structures under high-temperature environment is important for thermal-structural design. In this study, full-field thermal deformation and stress concentration of the notched structure was performed using global-local multi-digital image correlation (multi-DIC) systems. This techniques were developed and implemented by multi-DIC systems consists of 2D DIC system and 3D DIC system. The specimen was heated in a heating chamber to achieve the thermal expansion behavior. Then the images of structure's deformation and stress concentration at various temperature were recorded and analyzed by multi-DIC system. Afterward, full-field thermal deformation of the notched structure was determined with DIC technique and stress concentration at the notched structure was calculated by further processing. Finite element analysis of the notched structure is performed in ABAQUSTM and the results of the experiments show good agreement with those obtained from simulation. The results achieved in this study show the efficiency of the muilti-DIC method in thermal deformation as well as stress concentration of notched structure.

비행체의 초음속 비행 중 고온 환경에서의 열 거동은 비행체의 열 구조 설계에 중요하다. 본 연구에서는 전역-국부 다중 디지털 이미지 상관기법을 사용하여 노치 구조물의 전 영역의 열변형 및 응력집중 현상에 대해 관찰/분석하였다. 다중 DIC 시스템은 2D DIC 시스템과 3D DIC 시스템으로 구성되었다. 가열 챔버를 이용하여 노치 시편을 가열하였으며 여러 온도에서 다중 DIC 시스템을 사용하여 구조물의 변형 이미지를 촬영하고 분석하였다. 다중 DIC 기법을 사용하여 노치 시편의 전 영역 변형률과 노치 부위의 응력집중 현상을 계측/분석하였으며 ABAQUSTM 프로그램을 이용하여 노치 시편에 대해 유한요소해석을 진행하고 실험결과와 비교 분석하였다. 본 연구를 통해 다중 DIC 시스템의 열변형 계측과 응력 집중 현상의 연구 분석에서의 활용 가능성을 보여주었다.

Keywords

Acknowledgement

본 연구는 2018년도 정부(미래창조과학부)의 재원으로 우주핵심기술개발사업(NRF-2018M1A3A3A02065278)의 지원을 받아 수행된 연구이며, 지원에 대해 진심으로 감사드립니다.

References

  1. Thornton, E. A., "Thermal structures for aerospace application," Reston, Virginia, USA, American Institute of Aeronautics and Astronautics, 1996.
  2. Farinelli, C., Kim, H. I. and Han, J. H., "Feasibility Study to Actively Compensate Deformations of Composite Structure in a Space Environment," International Journal Aeronautical and Space Sciences, Vol. 13, 2012, pp. 221~228. https://doi.org/10.5139/IJASS.2012.13.2.221
  3. Weiland, R., Lupton, D. F., Fischer, B., Merker, J., Scheckenbach, C. and Witte, J., "HighTemperature Mechanical Properties of the Platinum Group Metals," Platinum Metals Rev., Vol. 50, 2006, p. 12.
  4. Mehrara, H., Eskin, D., Petrov, R., Lalpoor, M. and Katgerman, L., "Linear Contraction Behavior of Low-Carbon, Low-Alloy Steels During and After Solidification Using Real-Time Measurements," Metallurgical and Materials Transactions A, Vol. 45, 2014, pp. 1445~1456. https://doi.org/10.1007/s11661-013-2089-9
  5. Lyons, J. S., Liu, J. and Sutton, M. A., "HighTemperature Deformation Measurements Using Digital-Image Correlation," Experimental Mechanics, Vol. 36, 1996, pp. 64~70. https://doi.org/10.1007/BF02328699
  6. Chen, X., Xu, N., Yang, L. and Xiang, D., "High Temperature Displacement and Strain Measurement Using a Monochromatic Light Illuminated Stereo Digital Image Correlation System," Measurement Science and Technology, Vol. 23, 2012.
  7. Yang, X., Liu, Z. and Xie, H., "A Real Time Deformation Evaluation Method for Surface and Interface of Thermal Barrier Coatings During 1100℃ Thermal Shock," Measurement Science and Technology, Vol. 23, No. 10, 2012.
  8. Jin, T. L., Lee, S. H. and Goo, N. S., "Thermal Stress Measurement of a Double Ring Structure Using Digital Image Correlation Method," Experimental Techniques, Vol. 40, No. 1, 2016, pp. 195~205. https://doi.org/10.1007/s40799-016-0022-z
  9. Jin, T., Ha, N. S., Le, V. T., Goo, N. S. and Jeon, H. C., "Thermal Buckling Measurement of a Laminated Composite Plate Under a Uniform Temperature Distribution Using the Digital Image Correlation Method," Composite Structures, Vol. 123, 2015, pp. 420~429. https://doi.org/10.1016/j.compstruct.2014.12.025
  10. Chen F. X., Chen X., Xie X., Feng X. and Yang L. X., "Full-field 3D measurement using multicamera digital image correlation system," Optics and Lasers in Engineering, Vol. 51, No. 9, 2013, pp. 1044~1052. https://doi.org/10.1016/j.optlaseng.2013.03.001
  11. Genovese, K., Cortese, L., Rossi, M. and Amodio, D. "A 360-deg digital image correlation system for materials testing," Optics and Lasers in Engineering, Vol. 82, 2016, pp. 127~134. https://doi.org/10.1016/j.optlaseng.2016.02.015
  12. Zhao, T. J., Le, V. T. and Goo, N. S. "Global-local deformation measurement of stress concentration structures using a multi-digital image correlation system," Journal of Mechanical Science and Technology, Vol. 34, No. 4, 2020, pp. 1655~1665. https://doi.org/10.1007/s12206-020-0328-8
  13. DIC Algorithm, http://www.ncorr.com/index.php/dic-algorithms
  14. Bing, P., Kemao, Q., Huimin, X. and Anand, A., "Two-dimensional digital image correlation for in-plane displacement and strain measurement: a review," Measurement Science and Technology, Vol. 20, No. 6, 2009, pp. 1~17.
  15. Peter, W. H. and Panson, W. F., "Digital Image techniques on experimental stress analysis," Optical Engineering, Vol. 21, 1982.
  16. Helm, J. D., "Digital Image Correlation for Specimens with Multiple Growing Creaks," Society for Experiment Mechanics, Vol. 48, No. 6, 2008, pp. 753~762. https://doi.org/10.1007/s11340-007-9120-2
  17. ASTM E1820-17, Standard Test Method for Measurement of Fracture Toughness, ASTM International, West Conshohocken, PA, 2017, www.astm.org
  18. Le, V. T., Goo, N. S. and Kim, J. Y., "Thermo mechanical Behavior of Superalloy Thermal Protection System Under Aerodynamic Heating," Journal of Spacecraft and Rockets, Vol. 56, 2019, pp. 1432~1448. https://doi.org/10.2514/1.A34400
  19. Le, V. T. and Goo, N. S., "A Study on Design and Characterization of a Metallic Thermal Protection System for Hypersonic Vehicle," Ph.D. Dissertation, 2019.
  20. Le, V. T., Ha, N. S., Jin, T., Goo, N. S. and Kim, J. Y., "Thermal interaction of a circular plate-ring structure using digital image correlation technique and infrared heating system," Journal of Mechanical Science and Technology, Vol. 30, No. 9, 2016, pp. 4363~4372. https://doi.org/10.1007/s12206-016-0750-0
  21. ARAMIS User Manual-Software: ARAMIS v6.3 and higher, GOM-Optical Measuring Techniques, Germany, 2011.