Post-buckling and modal analysis of composite panels in thermal environment

Cunxian Cao

doi:10.1117/12.3007025

25 October 2023 Post-buckling and modal analysis of composite panels in thermal environment

Cunxian Cao

Proceedings Volume 12801, Ninth International Conference on Mechanical Engineering, Materials, and Automation Technology (MMEAT 2023); 1280105 (2023) https://doi.org/10.1117/12.3007025
Event: Ninth International Conference on Mechanical Engineering, Materials, and Automation Technology (MMEAT 2023), 2023, Dalian, China

Abstract

Based on the Mindlin plate theory and the von Karman nonlinear strain-displacement relationship, the nonlinear static equation and its iterative format of the composite siding structure in thermal environment are constructed. The 8-node serendipity unit is used to construct the structural finite element model. Buckling equilibrium path of composite siding structure is analyzed under typical boundary conditions. The results show that in the thermal environment, the thermal stress caused by the thermal expansion of the constrained structure reduces the structural stiffness, and the structural deformation after buckling increases the bending stiffness of the structure, and the natural frequency decreases first and then increases with the temperature rise. In the post-buckling stage, the thermal load causes the frequency to agglomerate. The first-order mode shape is sequentially exchanged with the adjacent higher-order modes in order of temperature rise, that is, the modal transition phenomenon, and the process and mechanism of the modal transition are analyzed.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Cunxian Cao "Post-buckling and modal analysis of composite panels in thermal environment", Proc. SPIE 12801, Ninth International Conference on Mechanical Engineering, Materials, and Automation Technology (MMEAT 2023), 1280105 (25 October 2023); https://doi.org/10.1117/12.3007025

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