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Structural Engineering and Mechanics Volume 90, Number 4, May25 2024 , pages 391-401 DOI: https://doi.org/10.12989/sem.2024.90.4.391 |
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Effect of flexure-extension coupling on the elastic instability of a composite laminate plate |
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H. Mataich, A. El Amrani, J. El Mekkaoui and B. El Amrani
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| Abstract | ||
| The present study focuses on the effect of extension-bending coupling on the elastic stability (buckling) of laminated composite plates. These plates will be loaded under uni-axial or bi-axial in-plane mechanical loads, especially in the orthotropic or anti-symmetric cross-angle cases. The main objective is to find a limit where we can approximate the elastic stability behavior of angularly crossed anti-symmetric plates by the simple behavior of specially orthotropic plates. The contribution of my present study is to predict the explicit effect of extension-flexion coupling on the elastic stability of this type of panel. Critically, a parametric study is carried out, involving the search for the critical buckling load as a function of deformation mode, aspect ratio, plate anisotropy ratio and finally the study of the effect of lamination angle and number of layers on the contribution of extension-flexure coupling in terms of plate buckling stability. We use first-order shear deformation theory (FSDT) with a correction factor of 5/6. Simply supported conditions along the four boundaries are adopted where we can develop closed-form analytical solutions obtained by a Navier development. | ||
| Key Words | ||
| buckling; composite materials; coupling; critical load; elastic instability | ||
| Address | ||
| H. Mataich, A. El Amrani, B. El Amrani: Laboratory of Mathematics, Modeling and Applied Physics, High Normal School, Sidi Mohamed Ben Abdellah University, 30040 Fez, Morocco J. El Mekkaoui: Laboratory of Technology and Innovations, High School of Technology, Sidi Mohamed Ben Abdellah University, 30040 Fez, Morocco | ||