Increases in Fatigue Crack Growth Rate and Reductions in Fatigue Strength due to Periodic Overstrains in Biaxial Fatigue Loading

2008 ◽  
pp. 192-192-15 ◽  
Author(s):  
A Varvani-Farahani ◽  
TH Topper
Keyword(s):  
Growth Rate ◽  
Fatigue Crack ◽  
Fatigue Strength ◽  
Crack Growth Rate ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Fatigue Crack Growth Rate ◽  
Fatigue Loading ◽  
Biaxial Fatigue

A Novel Modified Paris’ Law Based Evaluation of Fatigue Crack Propagation of LD2 under Combination of Corrosion and Cyclic Loadings

2015 ◽  
Vol 1096 ◽  
pp. 315-318
Author(s):  
Xu Dong Li ◽  
Hang Lv ◽  
Wen Xiu Wang
Keyword(s):  
Growth Rate ◽  
Fatigue Crack ◽  
Crack Growth Rate ◽  
Fatigue Crack Growth ◽  
Crack Propagation ◽  
Crack Growth ◽  
Fatigue Crack Growth Rate ◽  
Fatigue Loading ◽  
Loading Frequency ◽  
Paris Law

The present thesis made a research to evaluate fatigue crack growth rate subjecting to corrosion and cyclic fatigue loading, with the effect of load frequency on fatigue taken into account. A modified Paris’ law based model is proposed. An exponential modified expression of proportional parameter account for fatigue frequency is proposed based on the obvious fact that low frequency loading will lead to long fatigue life, thus prolong interaction time between corrosion media and specimen which will favor for crack propagation. Loading frequency higher enough will shorten that time, thus influence of corrosion will be significantly weaken, close to pure mechanical fatigue. Crack growth rate prediction from proposed formula is proved to be in good agreement with experimental results for steadily extended corrosion fatigue crack.

Sign in / Sign up

Export Citation Format

Share Document