Post-buckling optimization of composite structures using Koiter's method

Summary Thin‐walled structures, when compressed, are prone to buckling. To fully utilize the capabilities of such structures, the post‐buckling response should be considered and optimized in the design process. This work presents a novel method for gradient‐based design optimization of the post‐buck...

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Bibliographic Details
Published in:International journal for numerical methods in engineering 2016-11, Vol.108 (8), p.902-940
Main Authors: Henrichsen, Søren R., Weaver, Paul M., Lindgaard, Esben, Lund, Erik
Format: Article
Language:English
Subjects:
Asymptotic methods
asymptotic post-buckling
composite optimization
Composite structures
continuous fiber angle optimization
Design analysis
Design engineering
Design optimization
Koiter's method
Mathematical models
Optimization
post-buckling optimization
Square plates
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Summary:Summary Thin‐walled structures, when compressed, are prone to buckling. To fully utilize the capabilities of such structures, the post‐buckling response should be considered and optimized in the design process. This work presents a novel method for gradient‐based design optimization of the post‐buckling performance of structures. The post‐buckling analysis is based on Koiter's asymptotic method. To perform gradient‐based optimization, the design sensitivities of the Koiter factors are derived, and new design optimization formulations based on the Koiter factors are presented. The proposed optimization formulations are demonstrated on a composite square plate and a curved panel where the post‐buckling stability is optimized. Copyright © 2016 John Wiley & Sons, Ltd.
ISSN:0029-5981
1097-0207
DOI:10.1002/nme.5239