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Buckling Analysis of Laminated Plates with Asymmetric Layup by Approximation Method
Katarzyna Falkowicz1, Pawel Wysmulski1, Hubert Debski1
1Department of Machine Design and Mechatronics, Faculty of Mechanical Engineering, Lublin University of Technology, Nadbystrzycka 36, 20-618 Lublin, Poland.
Materials (Basel, Switzerland)
|July 29, 2023
Summary
This study examined carbon fiber reinforced polymer (CFRP) plates with cut-outs under compression. Experimental and numerical methods confirmed the accuracy of the Finite Element Method (FEM) in predicting buckling behavior.
Area of Science:
- Materials Science
- Mechanical Engineering
- Structural Analysis
Background:
- Thin-walled composite plates are crucial structural components.
- Understanding buckling and post-buckling behavior is essential for design.
- Central cut-outs can significantly influence plate stability under axial compression.
Purpose of the Study:
- To investigate the buckling and post-buckling response of CFRP plates with a central cut-out.
- To compare experimental results with numerical simulations using the Finite Element Method (FEM).
- To validate a numerical model for predicting the critical load and post-buckling behavior.
Main Methods:
- Experimental determination of post-buckling equilibrium paths (P-u) using the straight-line intersection method.
- Numerical analysis employing FEM in ABAQUS® software.
- Linear eigenvalue analysis and non-linear analysis with initial geometric imperfections.
Main Results:
- Experimental data provided critical load values through post-buckling path analysis.
- FEM simulations accurately predicted critical loads via eigenvalue analysis.
- Non-linear FEM analysis, incorporating geometric imperfections, successfully replicated experimental findings.
Conclusions:
- The study successfully validated the use of FEM for analyzing the buckling behavior of CFRP plates with central cut-outs.
- The numerical model accurately predicts the critical load and post-buckling equilibrium paths.
- Findings confirm the reliability of the developed FEM approach for structural design and analysis.
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