Local multiaxial fatigue damage estimation for structures under random vibrations

2017 ◽  
Vol 132 ◽  
pp. 1-7 ◽  
Author(s):  
A. Yaich ◽  
A. El Hami ◽  
L. Walha ◽  
M. Haddar
Keyword(s):  
Fatigue Damage ◽  
Multiaxial Fatigue ◽  
Damage Estimation ◽  
Random Vibrations

Modeling of Plasticity in Spectral Methods for Fatigue Damage Estimation of Narrowband Random Vibrations

2011 ◽  
Author(s):  
Herve Rognon ◽  
Tony Da Silva Botelho ◽  
Imad Tawfiq ◽  
Andre Galtier ◽  
Mohamed Bennebach
Keyword(s):  
Experimental Data ◽  
Fatigue Damage ◽  
Spectral Methods ◽  
High Cycle Fatigue ◽  
Damage Evaluation ◽  
Cycle Fatigue ◽  
Damage Estimation ◽  
Random Vibrations ◽  
Plastic Behaviour ◽  
Non Linear

In this paper, we present techniques for fatigue damage evaluation using spectral methods and a model taking into account elasto-plastic behaviour. The model is associated with a non linear fatigue law, covering the whole endurance domain (low cycle and high cycle fatigue). It uses Neuber’s method and is valid for limited plasticity. To validate this modeling, we perform a correlation between spectral methods, modified spectral methods and experimental data. We present here, the results obtained in the case of narrowband random vibrations.

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

2017 ◽  
Vol 34 (5) ◽  
pp. 551-566 ◽  
Author(s):  
A. Yaich ◽  
G. Kharmanda ◽  
A. El Hami ◽  
L. Walha ◽  
M. Haddar
Keyword(s):  
Design Optimization ◽  
Fatigue Damage ◽  
Hybrid Method ◽  
Multiaxial Fatigue ◽  
Damage Analysis ◽  
Reliability Based Design Optimization ◽  
Random Vibrations ◽  
Numerical Application ◽  
Reliability Based Design ◽  
Fatigue Damage Analysis

AbstractThe 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.

Spectral analysis of sine-sweep vibration: A fatigue damage estimation method

2021 ◽  
Vol 157 ◽  
pp. 107698
Author(s):  
M. Palmieri ◽  
F. Cianetti ◽  
G. Zucca ◽  
G. Morettini ◽  
C. Braccesi
Keyword(s):  
Spectral Analysis ◽  
Fatigue Damage ◽  
Estimation Method ◽  
Damage Estimation ◽  
Sine Sweep
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