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Finite Element Vibration Analysis of Laminated Composite Folded Structures With a Channel Section using a High-order Shear deformation Plate Theory  

유용민 (서울시립대학교 토목공학과)
장석윤 (서울시립대학교 토목공학)
이상열 (MIT토목환경공학과)
Publication Information
Journal of the Computational Structural Engineering Institute of Korea / v.17, no.1, 2004 , pp. 21-30 More about this Journal
Abstract
This study deals with free vibrations of laminated composite structures with a channel section using finite element method. In this paper, the mixed finite element method using Lagrangian and Hermite interpolation functions is adopted and a high-order plate theory is used to analyze laminated composite non-prismatic folded plates with a channel section more accurately for free vibration. The theory accounts for parabolic distribution of the transverse shear stress and requires no shear correction factors supposed in the first-order plate theory. An 32×32 matrix is assembled to transform the system element matrices from the local to global coordinates using a coordinate transformation matrix, in which an eighth drilling degree of freedom (DOF) per node is appended to the existing 7-DOF system. The results in this study are compared with those of available literatures for the conventional and first-order plate theory. Sample studies are carried out for various layup configurations and length-thickness ratio, and geometric shapes of plates. The significance of the high-order plate theory in analyzing complex composite structures with a channel section is enunciated in this paper.
Keywords
laminated composite; channel section; a high-order plate theory; in-plane rotational degrees of freedom; coordinate transformation matrix; finite element method;
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Times Cited By KSCI : 2  (Citation Analysis)
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