Optimal Design of Composite Stiffened Panel with Cohesive Elements using Micro-Genetic Algorithm

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A postbuckling analysis for composite stiffened structures is a representative nonlinear analysis, but is difficult to obtain analysis results and a lengthy computational time is required. In this study, an accurate and realistic postbuckling model for a stiffened composite panel is made, and optimization module is studied. In order to predict the realistic behavior in the postbuckling region, cohesive elements were introduced to the analysis model to account for skin-stiffener debonding. The global behaviors and failure loads of the analysis results were found to be similar to the experimental results. Based on this analysis model, the optimal layer design of a composite stiffened panel up to postbuckling failure was performed using micro genetic algorithm. The optimized result showed a higher maximum failure load in the postbuckling region.
Publisher
SAGE Publications
Issue Date
2008
Keywords

postbuckling; composite stiffened structure; cohesive element; optimization; micro GA

Citation

Journal of Composite Materials, Vol..42, No.21, pp.2259-2274

ISSN
0021-9983
DOI
10.1177/0021998308094967
URI
http://hdl.handle.net/10203/25434
Appears in Collection
AE-Journal Papers(저널논문)

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