PSI - Issue 33

Paolo Ferro et al. / Procedia Structural Integrity 33 (2021) 198–206 P. Ferro et al./ Structural Integrity Procedia 00 (2019) 000–000

205

8

3.2. Mechanical results After welding the angle between the flange and the web obtained by the numerical model was 88.80 ° against an experimental value of 88.56± 0.17° that is a reasonable good result, given the complexity of the process modelled and the order of magitude of the deformed shape. Fig. 6 shows the deformed shape of the T-joint afeter welding.

Fig. 5. Nodes displacement U y .

After stress relief heat treatment, the distortion angle didn’t show any variation and the numerical results confirmed that experimental evidence. However, residual stress reduced significantly as shown in Fig. 6.

Fig. 6. Residual stress along upper surfece of the middle cross section starting from the weld toe.