Journal of Vibration and Sound

Journal of Vibration and Sound

Numerical and analytical investigation of buckling behavior of a symmetric airfoil made of laminated composite Shell

Document Type : research article

Authors
Mohammad خاکباز 1
Amin Darani goldarreh 2
Alireza Ebrahimi Hesari 3
1 Master of Science in Aerospace Engineering (Structural), Faculty of Mechanical Engineering, Iran University of Science and Technology, Tehran, Iran
2 Student in Aerospace Engineering (Aero structures), Faculty of Mechanical Engineering, Iran University of Science and Technology, Tehran, Iran
3 PhD student in Mechanical Engineering (Applied Design), Faculty of Mechanical Engineering, Iran University of Science and Technology, Tehran, Iran
Abstract
This study has investigated analytically and numerically the buckling loading and buckling mode shapes of a symmetrical NACA0012 airfoil with a laminated composite skin. The mechanical properties of the composite wing shell with [(0/90/45/-45] ply and AS4/3501-6 material are considered. In this research, first, the theory of thin plate buckling is explained using the potential energy method and the governing equations for the buckling of thin shells, and then numerical modeling is performed in the finite element software Abaqus, with a selected square mesh and the S4R shell element. The results of the buckling modes show that with increasing mode number, the critical buckling load also increases. The results of the analytical and numerical solution of the buckling loading of the layers with a difference of less than 10% show that,. The section [0] suffers the lowest buckling load, while the [90] arrangement shows about 27.6 times more resistance. Also, the use of ribs and stringers significantly increases the critical load by about 10 times compared to The porcelain layer becomes quasi-isotropic, which shows the importance of using internal structural reinforcements.
Keywords
NACA0012 airfoil
buckling loading
buckling modes
composite shell
rib and stringer
Subjects
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Journal of Vibration and Sound
Volume 14, Issue 27 - Serial Number 27
September 2025
Pages 81-98