한국정밀공학회지 (Journal of the Korean Society for Precision Engineering)

  • 제17권10호
  • /
  • Pages.200-205
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  • 2000
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  • 1225-9071(pISSN)
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  • 2287-8769(eISSN)
한국정밀공학회 (Korean Society for Precision Engineering)
권호 표지

Laser Holography 기법에 의한 균열 박판의 결함 진전에 따른 진동 특성에 관한 연구

A Study on Vibration Characteristic of Thin Plate in Crack Propagation by Laser Holography Method

  • 발행 : 2000.10.01
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초록

This paper presents the vibration characteristics of a rectangular plate with 45$^{\circ}$oblique crack and a smooth plate subjected to a uniaxial tension. The experiment is adopted by the time-average holography method. The natural frequency and mode shape are considered accurate according to the increasement of tensile load in the study. When tensile load is zero, the vibration modes are almost agreed with the smooth and the 45$^{\circ}$obliquely cracked plate. But since then, according to the increasement of load, it is shown that vibration modes are extremely varied. The effects of the crack length in the vibration characteristic are discussed in detail. It is indicated that the increase of the crack length makes the variation of the frequencies and modes complicate in the range of even a small load.

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참고문헌

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  5. Cleghorn, W. L., 'Free vibration analysis of rectangular plates with a linear crack along central axis,' Recent Advances in Structural Mechanics : Proceedings of the 1994 International Mechanical Engineering Congress and Exposition, Chicago, IL, USA New York, NY, The American Society of Mechanical Engineers, pp. 215-220, 1994
  6. Smith, Howard Michaelm, 'Principles of Holography, 2nd Edition,' John Wiley Sons, Inc, pp. 220-267, 1975