FATIGUE CRACK GROWTH FROM A CIRCULAR NOTCH UNDER HIGH LEVELS OF BIAXIAL STRESS |
| |
| Authors: | Hong Youshi M. W. Brown K. J. Miller |
| |
| Affiliation: | Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, People's Republic of China;Department of Mechanical and Process Engineering, The University of Sheffield, Mappin Street, Sheffield S1 3JD, England |
| |
| Abstract: | Abstract— A series of experiments have been conducted on cruciform specimens to investigate fatigue crack growth from circular notches under high levels of biaxial stress. Two stress levels (Δσ1= 380 and 560 MPa) and five stress biaxialities (λ=+1.0, +0.5, 0, −0.5 and −1.0; where λ=σ2/σ1 were adopted in the fatigue tests in type 316 stainless steel having a monotonic yield strength of 243 MPa. The results reveal that fatigue crack growth rates are markedly influenced by both the stress amplitude and the stress biaxiality. A modified model has been developed to describe fatigue crack growth under high levels of biaxial stress. |
| |
| Keywords: | |
|
|
