Geometrically nonlinear static deflection of stiffened composite plates: A fifth-order equivalent model
- Authors
- Bui, Tuan Anh; Kim, Jun-Sik; Park, Junyoung
- Issue Date
- Nov-2023
- Publisher
- ELSEVIER SCI LTD
- Keywords
- Non-intrusive model order reduction; Geometric nonlinearity; Proper orthogonal decomposition; Composite plate
- Citation
- COMPOSITE STRUCTURES, v.323
- Journal Title
- COMPOSITE STRUCTURES
- Volume
- 323
- URI
- https://scholarworks.bwise.kr/kumoh/handle/2020.sw.kumoh/21765
- DOI
- 10.1016/j.compstruct.2023.117508
- ISSN
- 0263-8223
- Abstract
- Nonlinear reduced-order models (NLROM) have been developed to predict the geometrically nonlinear behaviour of structures with low computational cost. NLROMs built using non-intrusive methods are compatible with commercial FE software and have the potential for wide application in engineering. The challenge of nonintrusive NLROMs is to accurately reproduce the internal force of structures. In literature, the internal force has been assumed to be a cubic polynomial function of generalized coordinates. However, this assumption is effective only for structures with small rigid rotations but not for structures with significant rigid rotations such as cantilever structures. In this paper, we propose a fifth-order polynomial approximation of the internal force for such cases. The nonlinear stiffness tensors of the reduced-order model are built using explicit formulas, ensuring applicability to all structures. Our proposed reduced-order model accurately predicts the nonlinear static deflection of composite plates with complex geometries.
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- Appears in
Collections - School of Mechanical System Engineering > 1. Journal Articles
- Department of Mechanical Design Engineering > 1. Journal Articles
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