PSI - Issue 28

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

169

8

The stress redistribution of the first load application is much more evident in the weld, nevertheless after the first cycle the residual stresses are stabilized (see Fig. 9).

10,0 12,0 14,0 16,0 18,0

t = 0 s t = 1 s t = 2 s t = 14 s

0,0 2,0 4,0 6,0 8,0

s [mm]

‐400,0 ‐350,0 ‐300,0 ‐250,0 ‐200,0 ‐150,0 ‐100,0 ‐50,0 0,0 50,0 100,0

σ [MPa]

Fig. 9. Stresses perpendicular to the “Weld Section” along ‘s’ coordinate of Fig. 7

An unexpected residual stresses redistribution occurred also in the web section, the line remained elastic but to maintain equilibrium a different stress field has been calculated (Fig. 10).

10,0 12,0 14,0 16,0

t = 0 s t = 1 s t = 2 s t = 14 s

0,0 2,0 4,0 6,0 8,0

s [mm]

‐350,0 ‐300,0 ‐250,0 ‐200,0 ‐150,0 ‐100,0 ‐50,0 0,0

50,0 100,0

σ [MPa]

Fig. 10. Stresses perpendicular to the “Web Section” along ‘s’ coordinate of Fig. 7

4. Conclusions An overview of the seismic analysis has been performed. The focus has been set on material modelling, based on literature kinematic hardening has been identified as the best compromise in terms of solution accuracy and data