Issue 49

N. Kaddouri et alii, Frattura ed Integrità Strutturale, 49 (2019) 331-340; DOI: 10.3221/IGF-ESIS49.33 338 a) b) c) Figure 9 : Variation of the J-Integral in function of the position of the default has a) Crack length =10mm, b) Crack length =20mm, c) Crack length =30mm. C ONCLUSION he analysis of the results allowed us to draw the following conclusions: - The composite patch considerably reduces the J-Integral and the stresses in the different substrates. - The stacking sequence plays a decisive role in reducing J-Integral and shear stresses in the adhesive and peeling in the patch. - The presence of defect significantly affects the value of the J-Integral and the stresses in the two substrates. - The presence of the defect of bonding, considerably affects the shear stress in the adhesive essentially if the defect is near the crack or at the free edges of the adhesive. - The rate of charge transfer increases when stresses are high at the plate and the adhesive. - The presence of the defect near a crack of considerable length considerably affects the stresses in the adhesive and J-Integral in the plate. - If the length of the crack is minimal, the position of the defect has little influence on the value of J-Integral. T