Finite element analysis of rectangular composite plates subjected to a uniformly distributed load
This project is meant to study the maximum bending deflections of composite laminates when subjected to uniform loading and in various configurations, namely with varying laminate thicknesses, stacking sequences and boundary conditions. Anti-Symmetric Cross Ply and Symmetric Cross Ply laminates wi...
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| Format: | Final Year Project |
| Language: | English |
| Published: |
Nanyang Technological University
2024
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| Online Access: | https://hdl.handle.net/10356/177864 |
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| Institution: | Nanyang Technological University |
| Language: | English |
| Summary: | This project is meant to study the maximum bending deflections of composite laminates when subjected to uniform loading and in various configurations, namely with varying laminate thicknesses, stacking sequences and boundary conditions.
Anti-Symmetric Cross Ply and Symmetric Cross Ply laminates with 2-ply to 16-ply
thicknesses are modelled using the Finite Element Analysis software ANSYS to study the
effect of bending-extension coupling on laminate bending deflections. Bending-extension
coupling terms B11 are present in Anti-Symmetric Cross Ply laminates but not in Symmetric
Cross Ply laminates. Previous studies indicate that coupling effect increases the bending
deflection of a laminate. This study reveals that only the 2-ply Anti-Symmetric laminate
shows a higher bending deflection due to coupling effect, with the other ply thicknesses of the
Anti-Symmetric laminate having a lower bending deflection than the Symmetric laminate.
The effects of the various simply supported boundary conditions S1 to S4 are analysed and it
shows that S1 conditions largely correspond with S3 conditions, whereas S2 conditions largely
correspond with S4 conditions, even when the boundary conditions are mixed.
Overall, the results from Finite Element Analysis are validated by theoretical calculations
using previously derived formulas and the MATLAB software to a high degree of accuracy.
Therefore, the findings from ANSYS can be deemed to be reliable.
This study reveals certain phenomenon that can be used to gain a deeper understanding of
composite materials, such as the convergence of maximum bending deflection after the ply
thickness exceeds 6-ply. |
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