PSI - Issue 82

Chiara Bedon et al. / Procedia Structural Integrity 82 (2026) 65–71 Chiara Bedon et al. / Structural Integrity Procedia 00 (2026) 000–000

69 5

= , ∗ = ∙ + = - + ./ = 012.4 0 -& '' (( && ). /* 0+ ,/ = 2 + 2

(2)

(3)

(4)

(5)

(6)

Fig. 4. Reference geometrical parameters for the calculation of E g,cr .

For the present analysis, the input G int values determined from the presently reported experimental tests (i.e., identical displacement rate and temperature/humidity conditions), resulting in 2.68 MPa for EVA and 67.11 MPa for SG, respectively. In these hypotheses, the equivalent cracked modulus of the broken layer can be calculated as: , = ! − − ∗ 2 " (7) Table 1. Calculated equivalent modulus of elasticity for the cracked glass layer ( E g,cr ) in SII and SIII (average value from series of n° samples).

V1

V2

t int [mm]

t g [mm]

n°

E g,cr (± st.dev.) [GPa]

D E [%]

n°

E g,cr (± st.dev.) [GPa]

D E [%]

10

2

16.6 ±1.14

-76.3

1.52

4

1

5.31±0.13

-92.4

SII

10

2

23.65±5.38

-66.2

3

25.27±15.16

-77.4

0.76

4

2

7.62±1.28

-89.1

3

11.16±2.88

-84.1

EVA

10

4

14.08±15.04

-79.9

1.52

4

1

0.13±0.11

-99.8

SIII

10

3

31.69±6.68

-54.7

3

35.98±9.16

-71.0

0.76

4

2

2.73±1.22

-96.1

3

7.88±2.06

-99.9

10

3

13.31±4.61

-81.0

1.52

4

2

17.48±0.88

-75.0

SII

10

3

22.6±8.31

-67.7

0.76

4

3

22.75±3.16

-67.5

SG

10

3

18.46±6.56

-73.6

1.52

4

2

8.72±4.36

-87.5

SIII

10

4

15.57±3.31

-77.8

0.76

4

2

11.26±1.25

-83.9