The detail fatigue property of aluminum alloy curved panel formed by unilateral shot peen forming was studied. As the shot peen formed panel with curved shape

the detail fatigue performance of curved surface sample was evaluated based on SWT model. The local load-bearing stress and strain characteristics on surface of sample during fatigue process were analyzed by means of point cloud mapping modeling

finite element simulation and resistance strain gauge monitoring. The results show that: under the same condition of axial loading 180 MPa nominal stress

the peak stress of flat plate is 263 MPa

and the local peak stress of curved plate is close to 400 MPa. The DFR cut-off value (DFRcutoff) of original flat plate is 184.6 MPa; The DFRcutoff of curved sheet formed by unilateral shot peening is 182.4 MPa by direct measurement

and is 221.6 MPa by SWT model evaluation. The DFRcutoff value of shot peening flat plate (bilateral shot peening) is 241.4 MPa

which is slightly higher than the SWT model evaluation value (error less than 10%)

because the work hardening effect is not considered in the SWT evaluation. Therefore

SWT model is an effective method to evaluate the detail fatigue performance of shot peened panel.