Journal of the Korean Society for Advanced Composite Structures (복합신소재구조학회 논문집)

Korean Society for Advanced Composite Structures (한국복합신소재구조학회)
권호 표지

Dynamic Instability of Delaminated Composite Structures with Various Geometrical Shapes

다양한 기하학적 형상을 갖는 층간 분리된 복합신소재 적층구조의 동적 불안정성

  • 이상열 (중부대학교 토목공학과) ;
  • 장석윤 (서울시립대학교 토목공학과)
  • Received : 2010.01.31
  • Accepted : 2010.03.02
  • Published : 2010.03.31
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Abstract

The dynamic instability analysis of delaminated composite structures subjected to in-plane pulsating forces is carried out based on the higher order shell theory of Sanders. In the finite element (FE) formulation, the seven degrees of freedom per each node are used with transformations in order to fit the displacement continuity conditions at the delamination region. The boundaries of the instability regions are determined using the method proposed by Bolotin. The numerical results obtained for skew plates and shells are in good agreement with those reported by other investigators. The new results for delaminated skew plate and shell structures in this study mainly show the effect of the interactions between the radius-length ratio and other various parameters, for example, skew angles, delamination size, the fiber angle of layer and location of delamination in the layer direction. The effect of the magnitude of the periodic in-plane load on the instability regions is also investigated.

Keywords

References

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