Evaluation of Bonding Parameters on Random Fatigue Life of Bonded Aluminum Joints

1982 ◽  
Vol 19 (7) ◽  
pp. 581-588 ◽  
Author(s):  
H.F. Wolfe ◽  
C.L. Rupert ◽  
H.S. Schwartz
Keyword(s):  
Fatigue Life ◽  
Bonding Parameters ◽  
Random Fatigue

Alternative Method for the Determination of a Full S-N Fatigue Profile

2016 ◽  
Vol 250 ◽  
pp. 209-216 ◽  
Author(s):  
Przemysław Strzelecki ◽  
Janusz Sempruch ◽  
Tomasz Tomaszewski
Keyword(s):  
Fatigue Life ◽  
Linear Regression ◽  
Fatigue Limit ◽  
Fatigue Curve ◽  
The Other ◽  
Staircase Method ◽  
Alternative Method ◽  
Random Fatigue

This paper presents two methods for estimating the S-N fatigue curve. The first is the traditional linear regression and staircase method. The other, alternative, method is based on random fatigue life, fatigue limit and probability. The both methods provide similar results but the latter one requires fewer test samples

scholarly journals Fatigue Life and Strength Analysis of a Main Shaft-to-Hub Bolted Connection in a Wind Turbine

Energies ◽  
2018 ◽  
Vol 12 (1) ◽  
pp. 7 ◽  
Author(s):  
Ji Kang ◽  
Haipeng Liu ◽  
Deyi Fu
Keyword(s):  
Finite Element ◽  
Fatigue Life ◽  
Wind Turbine ◽  
Ultimate Strength ◽  
High Strength ◽  
Computational Time ◽  
Strength Analysis ◽  
Main Shaft ◽  
Bolted Connection ◽  
Random Fatigue

High-strength bolts are widely used in wind turbines and play a significant role in their operation. In this paper, in order to study the ultimate strength of high-strength bolts in the connection between the hub and main shaft in a 2.5 MW wind turbine with pretension effects, two kinds of finite element models are presented: a solid bolt model and a simplified bolt model. Theoretical calculation was used to compare these models with the results of finite element methods. The ultimate strength analysis results showed that the simplified bolt model was the most efficient and useful in terms of computational time and memory usage. Based on this study, the simplified bolt model was used in the fatigue calculation considering multiple random fatigue loads, and the fatigue life of high-strength bolts was determined by combining the S–N curve of the bolt, based on the Palmgren–Miner Linear damage accumulation hypothesis.

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