Issue 50

M. Baghdadi et alii, Frattura ed Integrità Strutturale, 50 (2019) 68-85; DOI: 10.3221/IGF-ESIS.50.08

Patch with conservation of the surface and its thickness In this analysis, the repair was done by different patch shapes having the same surface (Fig. 6) and differing only in their geometry. Their effect on the level and distribution of the shear stresses in the adhesive layer are shown in Fig. 13 and 14. These results shows that in terms of relaxation of these stresses, the repair using an elliptical patch is the most effective and, whatever the plane of the structure (Fig 13a, b and c).

Figure 13: The effect of the patch shape on the shear stresses level in the adhesive layer along the crack propagation path. Repaired crack a =18mm, Applied stress = 150 MPa.

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