Issue 49

N. Kaddouri et alii, Frattura ed Integrità Strutturale, 49 (2019) 331-340; DOI: 10.3221/IGF-ESIS49.33

a)

Crack lenght a= 10 mm Crack lenght a= 20 mm Crack lenght a= 30 mm

Crack lenght a= 10 mm Crack lenght a= 20 mm Crack lenght a= 30 mm

10 11 12 13 14 15 16 17 18 19 shear stress (MPa)

0,22

0,20

0,18

0,16

0,14

7 8 9

0,12

J-Integral J (mj/mm²)

0,10

0

2

4

6

8

10

0

1

2

3

4

5

6

7

8

9 10

Defect position

Defect position

b) c)

Crack lenght a= 10 mm Crack lenght a= 20 mm Crack lenght a= 30 mm

18

16

14

12

10

8

Peel stress (MPa)

6

0

2

4

6

8

10

Defect position

d) Figure 10 : a) Different position of default in the adhesive layer. b) Variation of the J-Integral in function of the position of the defect c) Variation of the Shear Stress as a function of the position of the defect. d) Variation of the Peel Stress according to the position of the defect.

339