PSI - Issue 28

Romanin Luca et al. / Procedia Structural Integrity 28 (2020) 162–170 Author name / Structural Integrity Procedia 00 (2019) 000–000

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An out of plane displacement of 1.64 mm has been calculated on the outer edge. The final residual deformation at the end of cycling is 0.69 mm which is 0.06 mm higher than the deformation due to welding only. The residual stresses along the transversal direction have been read along the vertical line starting from the weld toe, named “Flange Section” of Fig. 7. The stress field is reported at different time steps, from the end of cooling after welding to the peaks and valley of the first cycles.

Fig. 7. The dotted red lines along represent where the stresses are read, the arrow indicates the direction of the curvilinear coordinate ‘s’

Residual stresses along the flange section redistributed after the first load application to then stabilize. At the weld toe, an inversion of sign has occurred as it can be noted in Fig. 8 between 0 s and 2 s.

0,0 10,0 20,0 30,0 40,0 50,0 60,0 70,0 80,0 90,0 100,0 ‐600,0 ‐500,0 ‐400,0 ‐300,0 ‐200,0 ‐100,0 0,0 100,0 200,0 300,0 400,0 s [mm] σ [MPa]

t = 0 s t = 1 s t = 2 s t = 14 s

Fig. 8. Transversal residual stresses along the “Flange Section” ‘s’ coordinate of Fig. 7