Post‐buckling optimization of composite structures using Koiter's method |
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| Authors: | Søren R Henrichsen Paul M Weaver Esben Lindgaard Erik Lund |
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| Affiliation: | 1. Department of Mechanical and Manufacturing Engineering, Aalborg University (AAU), Aalborg East, Denmark;2. Advanced Composites Centre for Innovation and Science, Department of Aerospace Engineering, University of Bristol, University Walk, Bristol, UK |
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| Abstract: | 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. |
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| Keywords: | asymptotic post‐buckling composite structures composite optimization continuous fiber angle optimization Koiter's method post‐buckling optimization |
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