Reliability-based Robust Design Optimization with the Reliability Index Approach applied to composite laminate structures

• Type: Article in International Scientific Journal
• Date: 2019

Authors

Gonçalo das Neves Carneiro (Author) FEUP; Carlos Conceição António (Author) FEUP

Journal

Title: Composite Structures

Vol. 209

Pages: 844-855

ISSN: 0263-8223

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 25 Citations

ISI Web of Science

Scopus - 27 Citations

Scientific classification

CORDIS: Technological sciences > Engineering ; Physical sciences > Mathematics

FOS: Engineering and technology > Mechanical engineering ; Natural sciences > Mathematics

Other information

Authenticus ID: P-00P-X1C

DOI: 10.1016/j.compstruct.2018.11.012

Abstract (EN): In this paper a new approach to the Reliability-based Robust Design Optimization (RBRDO) of angle-ply composite laminate structures is presented. The problem is defined as a bi-objective Robust Design Optimization (RDO) problem, with deterministic and probabilistic constraints. Design optimization is considered as the minimization problem of the weight (optimality) and the determinant of the variance-covariance matrix of the response functionals of the system (robustness). Reliability assessment is executed by the Reliability Index Approach (RIA), as an inner cycle. The key concept of this methodology is the exclusive use of evolutionary algorithms with elitist strategy, allowing for global convergence in the two optimization cycles. The RIA problem was reformulated and a set of new evolutionary operators were developed. A numerical example is presented and the results compared with other RBRDO and RDO formulations. Results show that deterministic and probabilistic structural integrity measures are quite sensitive to uncertainty, for multi-component composite structures.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 12