Uncertainty propagation in inverse reliability-based design of composite structures

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

Authors

António, Carlos Alberto da Conceição António (Author) FEUP; Luísa N. Hoffbauer (Author) FEUP

Conference proceedings International

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

Initial page: 173

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-011-4J6

Abstract (EN): Analysis of uncertainty propagation in Reliability-Based Design Optimization (RBDO) of composite laminate structures is presented. Using the Uniform Design Method (UDM) a set of design points is generated over a domain centred on the mean values of the random variables aiming to study the space variability. An approach based on optimal design of composite structures to achieve a specified reliability level is proposed and the corresponding maximum load is outlined as a function of ply angle. Using the generated UDM design points as input/output patterns an Artificial Neural Networks (ANN) is developed. The developed ANN and a Monte Carlo procedure are used to analyse the variance of structural reliability index and their relative sensitivities as a function of ply angle. Numerical examples showing the utility of the approach applied to angle-ply laminates are presented.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 18