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

• Type: Article in International Conference Proceedings Book
• Date: 2009

Authors

António, Carlos Alberto da Conceição António (Author) FEUP

Conference proceedings International

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

Initial page: 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

Scientific classification

FOS: Engineering and technology > Other engineering and technologies

CORDIS: Technological sciences

Other information

Authenticus ID: 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 14