Issue 55

N. Hammadi et alii, Frattura ed Integrità Strutturale, 55 (2021) 345-359; DOI: 10.3221/IGF-ESIS.55.27

Figure 12: Damage moment–rotation curve with effect of pressure values in the case of angular elbows 90° and temperature of 40°C under opening, closing and hors plans flexion moment We see in Figure (12) the same responses up to the critical moment with slightly different levels of damage, which corresponds to clearly significant angular displacements, especially for the case of the bending moment in opening and closing. The structure with the greatest pressure does not allow a large deformation capacity. The lower the pressure, the

356