Issue 49

E. Abdelouahed et alii, Frattura ed Integrità Strutturale, 49 (2019) 698-713; DOI: 10.3221/IGF-ESIS.49.63 710 Figure 17 : Damage moment-rotation curve under opening moment in the case of a) middle position with effect of their type and in the case of b) all thickness section default with effect of their position. As in the previous section, in the case of closing bending moment, the effect of defect quality is not important. The same response is always obtained with the same level of critical moment of flexion in opening. The defect by its position is always stressed in excessive compression, which is why the damage occurs at low values of the critical moment. Fig. (17) shows that the defect location in the composite elbow with the presence of pressure and that of temperature has a significant effect on the structure response and on the critical moment level for damage to the moment case. Bending in opening, with values shifted up to 3000Nm. Figure 18 : Hashin damage representation in structure with elbows of 60° under opening moment, type (2).