Raju, Gangadharan, Wu, Zhangming  ORCID: https://orcid.org/0000-0001-7100-3282, White, Simon and Weaver, Paul
2018.
Optimal postbuckling design of variable angle tow composite plates.
AIAA Journal
56
(5)
, pp. 2045-2061.
10.2514/1.J056043
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Abstract
Perturbation-based approximation methods are widely used in preliminary design studies of thin-walled structures. In this paper, postbuckling analysis of a variable-angle-tow composite plate is performed using the perturbation-based asymptotic numerical method, which transforms the nonlinear problem into a set of well-posed recursive linear problems. These linear problems are solved using a novel generalized differential-integral quadrature method, and the postbuckling solutions are sought over a finite load step size around the critical buckling point using asymptotic expansions. The accuracy of the asymptotic numerical method in evaluating the initial postbuckling of variable-angle-tow plates under compression is investigated. Subsequently, a novel postbuckling optimization approach based on asymptotic numerical method results is proposed for the design of variable-angle tow laminates. The postbuckling features obtained from asymptotic numerical method are used in an efficient two level optimization framework for the design of variable-angle-tow plates. At the first level, a globally convergent method of moving asymptotes is adopted to determine the optimal lamination parameter distributions that maximize the postbuckling performance of the variable-angle-tow plate. At the second level, a genetic algorithm is used to convert the optimal lamination parameter distributions into realistic variable-angle-tow layups. The optimization studies are performed for square variable-angle-tow plates for axial/biaxial compression under different in-plane boundary conditions.
| Item Type: | Article |
|---|---|
| Date Type: | Published Online |
| Status: | Published |
| Schools: | Schools > Engineering |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) |
| Publisher: | American Institute of Aeronautics and Astronautics |
| ISSN: | 0001-1452 |
| Date of First Compliant Deposit: | 24 April 2018 |
| Date of Acceptance: | 30 December 2017 |
| Last Modified: | 26 Nov 2024 05:15 |
| URI: | https://orca.cardiff.ac.uk/id/eprint/110892 |
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