Transactions of the Korean Society for Noise and Vibration Engineering (한국소음진동공학회논문집)

The Korean Society for Noise and Vibration Engineering (한국소음진동공학회)
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A Study about the Damage Model of a Cantilever Beam with Open Crack Generated in Whole Breadth of the Beam

보의 폭 전체에서 발생된 열린 균열을 갖는 외팔보의 손상모델에 관한 연구

  • 허영철 (한국기계연구원 e-엔지니어링 연구센터) ;
  • 김재관 (서울대학교 지구환경시스템공학부) ;
  • 박성환 (한국기계연구원 e-엔지니어링 연구센터)
  • Published : 2007.10.20
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Abstract

We studied the influences of open cracks in free vibrating beam with rectangular section using a numerical model. The crack was assumed to be single and always open during the free vibration and equivalent bending stiffness of a cracked beam was calculated based on the strain energy balance. By Galerkin's method, the frequencies of cantilever beam could be obtained with respect to various crack depths and locations. Also, the experiments on the cracked beams were carried out to find natural frequencies. The cracks were initiated at five locations and the crack depths were increased by five steps at each location. The experimental results were compared with the numerical results and the comparison results were discussed.

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References

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