Rapid assessment of multiaxial fatigue lifetime in notched components using an averaged strain energy density approach

2019 ◽  
Vol 124 ◽  
pp. 89-98 ◽  
Author(s):  
R. Branco ◽  
P.A. Prates ◽  
J.D. Costa ◽  
L.P. Borrego ◽  
F. Berto ◽  
...  
Keyword(s):  
Energy Density ◽  
Strain Energy Density ◽  
Strain Energy ◽  
Rapid Assessment ◽  
Multiaxial Fatigue ◽  
Fatigue Lifetime ◽  
Notched Components

Strain Energy Approach for Axial and Torsional Fatigue Life Prediction in Aged NiCrMoV Steels

2003 ◽  
Vol 17 (08n09) ◽  
pp. 1665-1670
Author(s):  
Gee Wook Song ◽  
Jung Seob Hyun ◽  
Jeong Soo Ha
Keyword(s):  
Fatigue Life ◽  
Energy Density ◽  
Strain Energy Density ◽  
Strain Energy ◽  
Multiaxial Fatigue ◽  
Density Model ◽  
Total Strain ◽  
Total Strain Energy ◽  
Torsional Fatigue ◽  
Total Strain Energy Density

Axial and torsional low cycle fatigue tests were performed for NiCrMoV steels serviced low-pressure turbine rotor of nuclear power plant. The results were used to evaluate multiaxial fatigue life models including Tresca, von Mises and Brown and Miller's critical plane. The fatigue life predicted by the multiaxial fatigue models didn't correspond with the experimental results in small strain range. We proposed the total strain energy density model to predict torsional fatigue life from axial fatigue data. The total strain energy density model was found to best correlate the experimental data with predictions being within a factor of 2.

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