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Reliability Based Design Optimization for Multiaxial Fatigue Damage Analysis Using Robust Hybrid Method

Published online by Cambridge University Press:  06 July 2017

A. Yaich*
Affiliation:
Laboratory of Mechanics, Modeling and ManufacturingNational School of Engineers of SfaxSfax, TunisiaLaboratory of Optimization and Reliability in Structural MechanicsNormandie UniversitéINSA of RouenRouen, France
G. Kharmanda
Affiliation:
Biomedical Engineering DepartmentLund UniversityLund, Sweden
A. El Hami
Affiliation:
Laboratory of Optimization and Reliability in Structural MechanicsNormandie UniversitéINSA of RouenRouen, France
L. Walha
Affiliation:
Laboratory of Mechanics, Modeling and ManufacturingNational School of Engineers of SfaxSfax, Tunisia
M. Haddar
Affiliation:
Laboratory of Mechanics, Modeling and ManufacturingNational School of Engineers of SfaxSfax, Tunisia
*
*Corresponding author (ahmed.yaich@insa-rouen.fr)

Abstract

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The purpose of the Reliability-Based Design Optimization (RBDO) is to find the best compromise between safety and cost. Therefore, several methods, such as the Hybrid Method (HM) and the Optimum Safety Factor (OSF) method, are developed to achieve this purpose. However, these methods have been applied only on static cases and some special dynamic ones. But, in real mechanical applications, structures are subject to random vibrations and these vibrations can cause a fatigue damage. So, in this paper, we propose an extension of these methods in the case of structures under random vibrations and then demonstrate their efficiency. Also, a Robust Hybrid Method (RHM) is then developed to overcome the difficulties of the classical one. A numerical application is then used to present the advantages of the modified hybrid method for treating problem of structures subject to random vibration considering fatigue damage.

Information

Type
Research Article
Copyright
Copyright © The Society of Theoretical and Applied Mechanics 2018