Thermo-mechanical design optimization of symmetric and non-symmetric sandwich plates with ceramic-metal-ceramic functionally graded core to minimize stress, deformation and mass

• Type: Article in International Scientific Journal
• Date: 2021

Authors

Moleiro, F (Author) Other; Madeira, JFA (Author) Other; Carrera, E (Author) Other; Ferreira, AJM (Author) FEUP

Journal

Title: Composite Structures

Vol. 276

ISSN: 0263-8223

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 5 Citations

Scopus - 19 Citations

Other information

Authenticus ID: P-00V-J3Q

DOI: 10.1016/j.compstruct.2021.114496

Abstract (EN): This work explores the multiobjective design optimization of symmetric and non-symmetric sandwich plates with ceramic-metal-ceramic functionally graded (FG) core, along with ceramic faces (if included), under thermo-mechanical loadings. The FG core is made of two functionally graded material (FGM) layers, each with the volume fractions of the constituent phases defined by a power-law function through-thickness, with the interface between them metal-rich and the core outer surfaces ceramic-rich. In line with symmetric or nonsymmetric sandwich plates, the design variables involve the thickness of each FGM layer of the core and the index of its power-law function, along with the thickness of each ceramic face. The thermal and mechanical problems are fully coupled using a layerwise mixed least-squares model with multi-field independent variables, including, most importantly, displacements, temperature and transverse stresses. The FG core z-continuous effective properties are also fully described by high-order z-expansions, as demonstrated adopting the rule of mixtures. The multiobjective optimization problem is solved by Direct MultiSearch derivative-free method, minimizing mass, transverse displacement and the stress field, measured by Tsai-Hill failure criteria, all together. Numerical results provide optimal symmetric and non-symmetric sandwich plates with ceramicmetal-ceramic FG core, considering distinct constituent materials and including three-dimensional approximate solutions for validation.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 21