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Free Vibrations and Buckling Loads of Axially Loaded Cross-Ply Laminated Composite Beam-Columns with Multiple Delaminations  

이성희 (한국생산기술연구원)
김형열 (한국건설기술연구원)
박기태 (한국건설기술연구원)
박대효 (한양대학교 토목공학과)
Publication Information
Journal of the Computational Structural Engineering Institute of Korea / v.15, no.3, 2002 , pp. 523-534 More about this Journal
Abstract
Free vibration and buckling analysis of multi-delaminated composite beam-columns subjected to axial compressive load is performed in the present study In order to investigate the effects of multi-delaminations on the natural frequency and the elastic buckling load of multi-delaminated beam-columns, the general kinematic continuity conditions are derived from the assumption of constant slope and curvature at the multi-dclamination tip. The characteristic equation of multi-delaminated beam-column is obtained by dividing the global multi-delauunated beam-columns into segments and by imposing recurrence relation from the continuity conditions on each sub-beam-column. The natural frequency and the elastic buck)ing load of multi-delaminated beam-columns according to the incremental load of axial compression, which is limited to the maximum elastic buckling load of sound laminated beam-column, are obtained. It is found that the sizes, locations and numbers of multi-delaminations have significant effect on natural frequency and elastic buckling load, especially the latter ones.
Keywords
multi-delaminations; laminated composite beam-columns; natural frequency; elastic buckling load; characteristic equation;
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