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Buckling Analysis of Thin-Walled Laminated Plates Considering In-Plane and Out-of-Plane Coupling Effects Under
Zbigniew Kolakowski1, Andrzej Teter2
1Department of Strength of Materials (K12), Lodz University of Technology (TUL), Stefanowskiego 1/15, 90-924 Lodz, Poland.
Materials (Basel, Switzerland)
|August 13, 2026
Summary
This study examines the buckling of laminated plates under complex loads. Including the B-submatrix in analysis decreases critical buckling loads, highlighting its importance in structural stability.
Area of Science:
- Mechanical Engineering
- Materials Science
- Structural Analysis
Background:
- Investigates the buckling behavior of thin-walled rectangular laminated plates.
- Assumes linear variations in normal transverse load components and parabolic variations in shear load components on plate edges.
- Utilizes classical laminated plate theory (CLPT) as the theoretical foundation.
Purpose of the Study:
- To analyze the buckling behavior of laminated plates under complex in-plane loading.
- To investigate the influence of non-zero laminate coupling stiffness B-submatrix components.
- To determine the effect of specific B-submatrix components on the stability of rectangular laminated plates.
Main Methods:
- Employs classical laminated plate theory (CLPT).
- Analyzes six distinct in-plane loading scenarios in the pre-buckling stage.
- Tests ten general laminate plate examples with varying stacking sequences and uniform thickness.
Main Results:
- Eigen-problem solutions for laminated plates under complex in-plane loading were obtained.
- Demonstrates that the B-submatrix significantly affects bifurcation loads.
- For all investigated cases, the inclusion of the B-submatrix led to a decrease in bifurcation loads.
Conclusions:
- The B-submatrix plays a crucial role in the buckling stability of laminated plates.
- Accurate assessment of buckling loads requires detailed analysis of all stiffness matrix components and reduction coefficients.
- Structural design must account for the coupling effects within laminates to ensure stability.
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