HGA Approach for reliability-based design optimization of non-linear composite structures

• Tipo: Artigo em Livro de Atas de Conferência Internacional
• Data: 2009

Autores

António, Carlos Alberto da Conceição António (Autor) FEUP

Ata de Conferência Internacional

Título: IRF’2009 – Integrity - Reliability - Failure Challenges and Opportunities

Página Inicial: 171

IRF’2009 – Integrity - Reliability - Failure Challenges and Opportunities, Third International Conference ISBN: 978-972-8826-22-2 (Book) - 978-972-8826-21-5 (CD)

Faculty of Engineering, University of Porto, Porto, Portugal, July 20-24, 2009

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Outras ciências da engenharia e tecnologias

CORDIS: Ciências Tecnológicas

Outras Informações

ID Authenticus: P-011-4K4

Abstract (EN): An approach to reliability-based design of beam reinforced composite shell structures with non-linear geometric behaviour is proposed. The formulation involves probabilistic stress, displacement and buckling constraints. The structural integrity is evaluated through the reliability index. The random variables are the mechanical properties of laminates considered as homogeneous orthotropic materials. A new methodology based on a genetic algorithm (GA) and a hierarchical decomposition searching the global most probable failure point (MPP) is presented. Simultaneously the optimal design is searched through a hierarchical genetic algorithm (HGA) based on weight/cost minimisation under prescribed reliability constraints. The design variables are the ply angle, the ply thickness, the height and the width of the cross sections of the stiffeners. Numerical examples of the new proposed developments are presented.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 14