Reliability-based design optimization for fatigue damage analysis

Reliability-based design optimization for fatigue damage analysis

The objective of reliability-based design optimization (RBDO) is to design structures which should be both economic and reliable. The existing methods lead to very high computational cost, local optima, and weak convergence stability. In this paper, we present a new methodology of RBDO, leading to g...

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Bibliographic Details
Published in:International journal of advanced manufacturing technology Vol. 76; no. 5-8; pp. 1021 - 1030
Main Authors: Ibrahim, M. Haisam, Kharmanda, G., Charki, A.
Format: Journal Article
Language:English
Published: London Springer London 01-02-2015
Springer Nature B.V
Springer Verlag
Subjects:
CAE) and Design
Computational efficiency
Computer-Aided Engineering (CAD
Computing costs
Computing time
Crack propagation
Damage assessment
Design analysis
Design optimization
Engineering
Engineering Sciences
Fatigue failure
Industrial and Production Engineering
Mechanical Engineering
Media Management
Original Article
Reliability analysis
Reliability aspects
Safety factors
Structural reliability
Reliability-based design optimization
Fatigue damage analysis
Safety factors
Online Access:Get full text
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Summary:The objective of reliability-based design optimization (RBDO) is to design structures which should be both economic and reliable. The existing methods lead to very high computational cost, local optima, and weak convergence stability. In this paper, we present a new methodology of RBDO, leading to global solutions without additional computing cost for the reliability evaluation. The safety factor formulation for linear and nonlinear cases has been used to reduce efficiently the computational time. This technique is fundamentally based on a study of the sensitivity of the limit state function with respect to the design variables. In order to demonstrate analytically the efficiency of this methodology, the optimality conditions are then used. The presented application on fatigue damage analysis shows the advantages of the optimum safety factor (OSF) for treating complex structural problems.
ISSN:0268-3768
1433-3015
DOI:10.1007/s00170-014-6325-2