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Buckling of soft-core sandwich plates with angle-ply face sheets by means of a C0 finite element formulation

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Abstract

In order to avoid using C1 interpolation functions in finite element implementation of the previous zig–zag theories, artificial constraints, in which the first derivatives of transverse displacement will be replaced by the assumed variables, are usually employed. However, such assumption will violate continuity conditions of transverse shear stresses at interfaces. Differing from previous work, this paper will propose a C0-type zig–zag theory for buckling analysis of laminated composite and sandwich plates with general configurations. The first derivatives of transverse displacement have been taken out from a displacement field of the proposed zig–zag theory. Thus, the C0 interpolation functions are only required in finite element implementations of the proposed model. Without use of any artificial constraints, an eight-node quadrilateral element based on the proposed model is presented by incorporating the terms associated with the geometric stiffness matrix. In order to verify performance of the proposed model, several buckling problems of sandwich plates with soft core have been analyzed. Numerical results show that the proposed model is able to predict accurately buckling loads of the soft-core sandwich plates with varying fiber orientations of face sheets.

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Authors and Affiliations

  1. Key Laboratory of Liaoning Province for Composite Structural Analysis of Aerocraft and Simulation, Shenyang Aerospace University, Shenyang, 110136, China

    Ren Xiaohui & Wu Zhen

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  1. Ren Xiaohui
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  2. Wu Zhen
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Correspondence to Wu Zhen.

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Xiaohui, R., Zhen, W. Buckling of soft-core sandwich plates with angle-ply face sheets by means of a C0 finite element formulation. Arch Appl Mech 84, 1173–1188 (2014). https://doi.org/10.1007/s00419-014-0876-4

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  • DOI: https://doi.org/10.1007/s00419-014-0876-4

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