Global–Local Optimization of Composite Structures Using Unified High-Order Finite Element Models
Alex Pereira Do Prado (EMBRAER, Politecnico di Torino, TU Delft - Aerospace Engineering)
Dario Zamani (Politecnico di Torino)
Alfonso Pagani (Politecnico di Torino)
Erasmo Carrera (Politecnico di Torino)
Saullo G.P. Castro (TU Delft - Aerospace Engineering)
Roeland De Breuker (TU Delft - Aerospace Engineering)
Pedro Higino Cabral (EMBRAER)
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Abstract
A global optimization framework with global–local verification is developed for composite wings by coupling a NASTRAN-based global finite element model with Carrera Unified Formulation (CUF)-based high-order local analyses. The proposed methodology enables the minimization of structural weight under stress and buckling constraints, while identifying critical zones of interest for multi-fidelity and hierarchical strategy. The global model based on first-order shear deformation theory identifies the critical regions where the CUF Equivalent Single Layer and Layer-Wise refinements should be introduced to provide detailed local buckling and stress analyses. This integrated global-local framework enables adaptive local fidelity global-local analysis, improving margins of accuracy while mapping the accessible design space and maintaining computational efficiency.
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