Fatigue life prediction based on equivalent initial flaw size for Al-Li alloy 2297 under spectrum loading

2017 ◽  
Vol 103 ◽  
pp. 39-47 ◽  
Author(s):  
Yanzeng Wu ◽  
Yaowu Xu ◽  
Xiang Guo ◽  
Rui Bao
Keyword(s):  
Fatigue Life ◽  
Life Prediction ◽  
Flaw Size ◽  
Fatigue Life Prediction ◽  
Spectrum Loading

scholarly journals Effect of Mean Stress on the Fatigue Life Prediction of Notched Fiber-Reinforced 2060 Al-Li Alloy Laminates under Spectrum Loading

2018 ◽  
Vol 2018 ◽  
pp. 1-16
Author(s):  
Weiying Meng ◽  
Liyang Xie ◽  
Yu Zhang ◽  
Yawen Wang ◽  
Xiaofang Sun ◽  
...  
Keyword(s):  
Fatigue Life ◽  
Linear Model ◽  
Life Prediction ◽  
Piecewise Linear ◽  
Forecast Accuracy ◽  
Cyclic Stress ◽  
Fatigue Life Prediction ◽  
Fiber Reinforced ◽  
Piecewise Linear Model ◽  
Spectrum Loading

This paper presents a study on the fatigue life prediction of notched fiber-reinforced 2060 Al-Li alloy laminates under spectrum loading by applying the constant life diagram. Firstly, a review on the state of the art of constant life diagram models for the life prediction of composite materials is given, which highlights the effect on the forecast accuracy. Then, the fatigue life of notched fiber-reinforced Al-Li alloy laminates (2/1 laminates and 3/2 laminates) is tested under cyclic stress, which has different stress cycle characteristics (constant amplitude loading and Mini-Twist spectrum loading). The introduced models are successfully realized based on the available experimental data of examined laminates. In the case of Mini-Twist spectrum loading, the effect of the constant life diagram on the life prediction accuracy of examined laminates is studied based on the rainflow-counting method and Miner damage criteria. The results show that the simple Goodman model and piecewise linear model have certain advantages compared to other complex models for the life prediction of notched fiber metal laminates with different structures under Mini-Twist loading. From the engineering perspective, the S-N curve prediction based on the piecewise linear model is most applicable and accurate among all the models.

scholarly journals Fatigue Life Prediction Based on Crack Growth Analysis Using an Equivalent Initial Flaw Size Model: Application to a Notched Geometry

2015 ◽  
Vol 114 ◽  
pp. 730-737 ◽  
Author(s):  
A.S.F. Alves ◽  
L.M.C.M.V. Sampayo ◽  
J.A.F.O. Correia ◽  
A.M.P. De Jesus ◽  
P.M.G.P. Moreira ◽  
...  
Keyword(s):  
Fatigue Life ◽  
Crack Growth ◽  
Life Prediction ◽  
Growth Analysis ◽  
Flaw Size ◽  
Fatigue Life Prediction ◽  
Model Application ◽  
Size Model

Fatigue life prediction based on an equivalent initial flaw size approach and a new normalized fatigue crack growth model

2016 ◽  
Vol 69 ◽  
pp. 15-28 ◽  
Author(s):  
J.A.F.O. Correia ◽  
S. Blasón ◽  
A.M.P. De Jesus ◽  
A.F. Canteli ◽  
P.M.G.P. Moreira ◽  
...  
Keyword(s):  
Fatigue Crack ◽  
Fatigue Life ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Growth Model ◽  
Life Prediction ◽  
Flaw Size ◽  
Fatigue Life Prediction ◽  
Crack Growth Model
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