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Buckling Analysis of Angle-ply Composite and Sandwich Plates by Combination of Geometric Stiffness Matrix

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Abstract

Buckling response of angle-ply laminated composite and sandwich plates are analyzed using the global-local higher order theory with combination of geometric stiffness matrix in this paper. This global-local theory completely fulfills the free surface conditions and the displacement and stress continuity conditions at interfaces. Moreover, the number of unknowns in this theory is independent of the number of layers in the laminate. Based on this global-local theory, a three-noded triangular element satisfying C1 continuity conditions has also been proposed. The bending part of this element is constructed from the concept of DKT element. In order to improve the accuracy of the analysis, a method of modified geometric stiffness matrix has been introduced. Numerical results show that the present theory not only computes accurately the buckling response of general laminated composite plates but also predicts the critical buckling loads of soft-core sandwiches. However, the global higher-order theories as well as first order theories might encounter some difficulties and overestimate the critical buckling loads for soft-core sandwich plates.

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Authors and Affiliations

  1. State Key Laboratory for Structural Analysis of Industrial Equipment, Dalian University of Technology, Dalian, 116023, People’s Republic of China

    Wu Zhen & Chen Wanji

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  1. Wu Zhen
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  2. Chen Wanji
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Correspondence to Chen Wanji.

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Zhen, W., Wanji, C. Buckling Analysis of Angle-ply Composite and Sandwich Plates by Combination of Geometric Stiffness Matrix. Comput Mech 39, 839–848 (2007). https://doi.org/10.1007/s00466-006-0073-6

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