13th International Conference on Fracture June 16–21, 2013, Beijing, China -3- -100 0 100 200 300 -40 -30 -20 -10 0 10 20 30 40 Longtidial of residual stress y res MPa Distance from weld line center x mm Weld line of FSW (a) Base metal (b) FSW panel (Large size specimen) (c) FSW panel (Small size specimen) Figure 2. Specimen’s dimensions Figure 3. Relationship between longitudinal of residual stress and distance from weld line center 400 mm 1000 mm 700 mm Part connected to fatigue testing machine 400 mm Φ 3 m Φ 3 m L 1000 mm 700 mm 1 mm Holes needed to install extensometer Φ2 mm Notch Weld line center 155 mm Φ 3 mm Φ 3 mm L 580 mm 300 mm 5 mm Holes needed to install extensometer Φ2 mm Weld line of FSW Notch Weld line center x y
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