The aim of this thesis is to investigate buckling, post-buckling behaviors and failure
characteristics of composite laminated plates under compressive loading with the
help of finite element method and experiments. In the finite element analyses, eigen
value extraction method is used to determine the critical buckling loads and nonlinear
Riks and Newton-Raphson methods are employed to obtain post-buckling
behaviors and failure loads. The effects of geometric imperfection amplitude on
buckling and post-buckling are discussed. Buckling load, post buckling loaddisplacement
relations, out of plane displacements and end shortening of the plates
are determined numerically. Furthermore, the numerical results are compared with
experimental findings for two different laminates made of woven fabric and unidirectional
tapes where buckling, post-buckling behavior and structural failure of
laminated plates were determined. The comparisons show that there is a good
agreement between numerical and experimental results obtained for buckling load
and post-buckling range. However, 15 % - 22 % differences are predicted between
the experimental and numerical results for failure of laminates made of woven fabric
whereas the laminates with uni-directional tapes show good agreement.
| Identifer | oai:union.ndltd.org:METU/oai:etd.lib.metu.edu.tr:http://etd.lib.metu.edu.tr/upload/12614924/index.pdf |
| Date | 01 September 2012 |
| Creators | Namdar, Omer |
| Contributors | Darendeliler, Haluk |
| Publisher | METU |
| Source Sets | Middle East Technical Univ. |
| Language | English |
| Detected Language | English |
| Type | M.S. Thesis |
| Format | text/pdf |
| Rights | To liberate the content for public access |
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