Issue 49

E. Abdelouahed et alii, Frattura ed Integrità Strutturale, 49 (2019) 698-713; DOI: 10.3221/IGF-ESIS.49.63 708 quality which results in critical moment values up to 200Nm difference. Fig. (13) shows that in the case where the defect is in the middle of the thickness of the elbow, failure is more favored. This one is much more stressed with the torsion forces which damage the fibers after the total damage of the matrix of the composite than in the case where the defect is in the free surface. Because the latter is absorbed by the angular displacements. The effect of the location of defects on the response and the critical moment in bending out of planes depends on the approach towards the zones of tension or excessive compression from where the disordered one illustrated in the Fig. (13). Figure 13 : Damage moment-rotation curve under hors plans 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. Figure 14 : Hashin damage representation in structure with elbows of 60° under hors plans moment, type (3).